BE493591A - - Google Patents

Description

       

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  NATIONAL INTER-URBAN NUMBERING SYSTEM
The present invention relates to interurban interconnection systems, in particular those which serve a large territory, comparable to that of a country or several neighboring countries.



   Until now, long-distance long distance calls between remote localities within a country were routed from an interurban switchboard located in an outgoing office or central to an interurban switchboard located in a tandem office, then to a trunk board from another tandem office if necessary, and thence to a trunk board at an incoming office, and finally routed from the trunk board at the incoming office to the called subscriber station.

   This routing of long distance calls not only takes a considerable amount of time and requires repeated handling by the operators of the long distance tables in the various offices, but also involves many risks of errors and is also costly and inefficient.
The present invention therefore generally aims to establish an improved long-distance telephone interconnection system serving a wide area, a system in which the operator of the trunk switchboard of any outgoing office has access to the switching and telephone equipment. control so that it can route a long distance call directly to any called subscriber station at any incoming office,

   without the help of an operator of a trunk switchboard of any other office and regardless of the relative positions of the departure and arrival offices in the telephone system.



   The invention. further aims to establish, in a long distance telephone interconnection system of the aforementioned type, an apparatus accessible to an operator of an interurban switchboard of any office of departure, apparatus which can be controlled in accordance with determined fixed digits , with a view to routing a long distance call to a requested subscriber station in an incoming office, regardless of the relative positions of the outgoing and incoming offices in the telephone system.

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   The invention also aims to establish a telephone system of the aforementioned type, endowed with a determined long distance numbering program and applicable uniformly throughout the system and without regard to the relative positions of the originating exchanges and of the terminating exchanges involved in the system. the various long distance calls to be established in this system.



     The invention also aims to establish, in an inter-city interconnection telephone system, an improved arrangement of the inter-city switchboard and of the recording equipment in each long-distance office of the system.



   The invention further aims to establish, in a long-distance telephone interconnection system, an improved recorder-translator equipment located in a long-distance office and capable of distinguishing between long-distance calls intended respectively for nearby offices and far offices.



   The invention further aims to establish, in a long-distance telephone interconnection system, an improved recorder-translator equipment, located in a long-distance office and which can be selectively controlled with a view to establishing a long-distance communication by means of a long-distance telephone. a nearby office and in order to make a long distance call intended to be established in a distant office, to another recorder-translator device located in a tandem long-distance office provided between the long-distance office in question and the distant office.



   Other characteristics of the invention form part of the general arrangement of the elements of the circuit of the telephone system, making it possible to achieve the operating characteristics of this system indicated above, as well as other additional characteristics.



   Chapter 1.



   GENERAL PROVISION OF THE TELEPHONE SYSTEM,
The invention, both as regards its general arrangement and its mode of operation, as well as its other objectives and advantages, will be better understood by referring to the following description, considered with reference to the appended drawings, in which:
Fig. 1 is a schematic view of part of the territory served by a telephone system comprising the present invention, this view showing a number of interurban networks into which the territory is divided, as well as the network of junctions or external lines. between these networks.



   Figs. 2 to 8 inclusive, taken together, represent the general arrangement of the equipment incorporated in several of the offices forming part of several of these networks.



     Fig. 9 indicates the way of combining figs. 2 to 8 included in order to form a single diagram.



   Figs. 10 to 15 inclusive, taken together, show the details of some of the apparatus incorporated in one of the trunk offices forming part of one of the trunk networks of the telephone system, which apparatus comprises the features of the invention as briefly indicated herein. -above.



   Fig. 16 shows how to combine figs 10 to 15 inclusive, in order to form a single diagram.



   More especially the lower part of FIG. 2 schematically shows part of the equipment provided at the office at Blue Ridge (or BR); the upper part of figs 2 and 3 schematically shows part of the equipment provided at the Amber Town (or AT) office; the left part of fig 4 shows schematically part of the apparatus provided at the office of Maroon Lea (or ML); the right part of fig. 4 schematically represents part of the equipment provided at the

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 Orange Bay (or OB); the lower part of FIG. 5 schematically shows part of the equipment provided at the Green Field (or GF) office;

   the upper part of figs. 5 and 6 schematically show part of the equipment provided at the Gold Hill (or GH) intercity office; the upper left part of fig. 7 schematically shows part of the equipment planned for the office of Tan Stone (or TS); the upper right part of FIG. 7 schematically shows part of the equipment provided at the Vermillion Rock (or VR) office; the lower part of FIG. 7 schematically shows part of the equipment provided at the Red Gap (or RG) office; and, fig. 8 schematically shows part of the equipment provided at the interurban office of Rose Land (or RL).



   More specifically, the upper part of FIG. 10 shows part of the details of the operator position circuit 1003 arranged at the automatic switchboard 1000 of the AT office, as well as one of the interior junctions associated therewith, provided with an answer switch 1081 and a switch d. 'call 1082; upper part of fig. 11 shows the details of one of the. national interurban circuits 1100 arranged at the interurban office AT, as well as the researcher 1150 associated therewith: and, the upper part of FIG. 12 shows the details of one of the trunk selectors 1200 arranged at the trunk office AT and individually associated with the national trunk circuit 1100.

   Finally, the lower parts of figs 10, 11 and 12 and figs 13, 14 and 15 show details of one of the recorder-translators 1300 arranged at the AT long distance office and accessible to researcher 1150.



   As shown more specifically in FIG. 1 of the accompanying drawings, the telephone system shown here serves a large territory comparable to that of a country, for example such as the United States. This territory is divided into a large number of trunk networks assigned individual network codes. As shown, the trunk networks located respectively in the left part, in the central part and in the right part of this territory is assigned respectively network codes 218, 614 and ¯319; other intermediate trunk networks - being located between trunk networks 218 and 614 and between trunk networks 614 and 319.

   In the arrangement shown, the territory is so extensive that virtually each trunk network indeed has a tandem position with respect to every other trunk network, although the simplified diagram of FIG. 1 gives the impression that the trunk networks 218 and 319 are extreme networks, which was not considered. Each interurban network in this territory may be comparable to a single city in it or to an entire State, depending on the number of subscribers served by the interurban network in question.



   Each of the long distance networks includes a long distance office and one or more other offices. Thus, the interurban networks 218, 614 and 319 respectively comprise the interurban office AT, GH, and RL, and respectively comprise the other offices BR, GF and RG. In addition, the intermediate trunk networks located between trunk networks 218 and 614 include offices ML and OB; while the intermediate trunk networks located between the trunk networks 614 and 319 comprise the TS and VR offices. Each office in each network is assigned a prefix or office code.

   Thus, the code for the AT trunk office may be AM7 or only 267; the office code BR can be BL6 or only 256; the GH trunk code can be G04 or just 464; the GF office code can be GR5 or just 475; the area code of the interurban office RL can be R02 or only 762; and, the RG office code may be RE3 or only 733. Each office serves a number of subscriber lines, namely, a maximum of 10,000; and, in each office, each subscriber line is assigned an individual line number.

   Thus, the office BR serves a subscriber station T1 connected to the subscriber line assigned the line number 1234; the long distance office AT serves the subscriber station T2 connected to the subscriber line affected by line number 1234; the GF office serves the subscriber station T3 connected to the subscriber line assigned line number 1234;

   the long distance office GH serves the T4 subscriber station connected to the

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 subscriber line assigned line number 1234; the office RG serves the subscriber station T5 connected to the subscriber line assigned with line number 1234; the long distance office RL serves the subscriber station T6 connected to the subscriber line assigned with line number 12340
The various offices of the different trunk networks are interconnected by groups or trunks of trunk and trunk lines.



  Thus, the BR and AT offices are connected by a group of trunk lines, including the trunk line 101; offices GF and GH are connected by a group of trunk lines, including trunk line 107; and the RG and RL offices are connected by a group of trunk lines, including trunk line 112.

   The AT and GH offices are connected by a group of interurban lines, including the 102o interurban line. The AT and OB offices are connected by a group of interurban lines, including the 103 interurban line; the AT and ML offices are connected by a group of interurban lines, including interurban line 105; the GH and OB offices are linked by a group of interurban lines, including interurban line 104; and, the OB and ML offices are connected by a group of interurban lines, including the interurban line 1060. Similarly, the GH and RL offices are connected by a group of interurban lines, including the interurban line 108; the GH and TS offices are connected by a group of trunk lines, including trunk line 109;

   the TS and VR offices are connected by a group of interurban lines, including interurban line 110; and the VR and RL offices are connected by a group of trunk lines, including trunk line 111.



   In accordance with the interconnection program by junctions or external lines, each interurban network in the territory is assigned an individual three-digit code, the first digit of which may be from 2 to 9, of which the second digit may be 1 or 0 , and whose third digit can be 1 to 0.

   Each office in each long distance network is assigned an individual three-digit code, the first digit of which may be from 2 to 9, the second digit of which may be from 2 to 9 and the third digit of which may be from 1 to 0. Each subscriber line of each office is assigned an individual line number, the number of digits of which is appropriate to the importance of this office, the line numbers of offices with 10,000 com - taking four digits, the line numbers of offices with 10,000 lines comprising three digits, etc.

   In addition, and according to the trunk interconnection program, the trunk switchboard of each trunk office is assigned the number 110 and can be reached by any subscriber station in any office. of the interurban network by dialing the number 110. Likewise, the numbers 112, etc .... are assigned to the information table, etc ..., of each interurban office of each interurban network.

   Therefore, it will be understood that the national call number for each subscriber line in the territory includes a three-digit network code, a three-digit office code and a multi-digit line number, depending on the capacity of the office. ; so that each subscriber line of a 100,000-line office is assigned a ten-digit national call number, since it includes a four-digit line number.
As shown in figs 2 to 8 inclusive, the subscriber line 201 going to the subscriber station T1 of the office BR ends on a line circuit 202 provided with a distributor 203 and is accessible to a group of researchers, including researcher 204,

     the latter being wired in pair with a first local selector 205. In addition, the subscriber line 201 is accessible to a group of long distance connectors, including the long distance connector 218; which in turn is accessible to a group of second selectors, including the second selector 217, which in turn is accessible to a group of first selectors, including the first selector 216, which is in turn accessible to a group of input office selectors, including the input office selector 215. One end of trunk line 101 terminates in a trunk 210 provided at office BR and individually connected to the office selector input 215 and accessible to the various first local selectors 205, etc ...

   Likewise, the subscriber line 501 terminating at the pos-

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 The subscriber T3 of the GF office ends on a line circuit 502 fitted with a distributor 503 and is accessible to a group of researchers, including the researcher 504, the latter being wired in pair with a first local selector 5050 In addition, the subscriber line 501 is accessible to a group of long distance connectors, including the long distance connector 518, which in turn is accessible to a group of second selectors, including the second selector 517; which is in turn accessible to a group of first selectors, including the first selector 516; which in turn is accessible to a group of office input selectors, including the office input selector 515.

   One end of trunk line 107 terminates at trunk line 510 located at office GF and individually connected to office input selector 515, and accessible to various local first selectors 505, etc. Similarly, line 701 to subscriber station T5 in the RG office terminates on a line circuit 702 provided with a distributor 703 and is accessible to a group of searchers, including searcher 704, the latter being wired in pair with a first local selector 705.

   Furthermore, the subscriber line 701 is accessible to a group of trunk connectors, including the trunk connector 718, which in turn is accessible to a group of second selectors, including the second selector 717; is in turn accessible to a group of first selectors, including the first selector 716, which in turn is accessible to a group of office input selectors, including the office input selector 715. One end of the line Junction 112 terminates in a junction circuit 710 arranged at office RG and individually connected to office input selector 715 and accessible to the various first local selectors 705, etc.,.



   The subscriber line 221 terminating at the subscriber station T2 of the AT office terminates on a line circuit 222 provided with a distributor 223 and is accessible to a group of researchers, including the seeker 224, the latter being wired in pair with a first local selector 225. Additionally, subscriber line 221 is accessible to a group of trunk connectors, including trunk connector 254; which in turn is accessible to a group of second selectors, including the second selector 253; is in turn accessible to a group of first selectors, including the first selector 252.



  The first local selector 225 has access to a group of special selectors, including the special selector 226; which in turn has access to a group of trunks leading to an information table 227. In addition, the AT office comprises an automatic long distance switchboard 1000 provided with a series of operator position circuits, including the first attendant position circuit 1003 and a traffic distributor 245. The attendant position circuit 1003 has a series of interior junctions, one of which is shown, and includes a response switch 1081 and a call switch 1082, as well as an associated starter circuit 243 and an interior junction distributor 244.

   Further, the attendant position circuit 1003 includes a set of keys 235, an associated sender or sender control circuit 236, and a connected transmitter 237, as well as a connected recorder 238.



   The trunk board 1000 are also associated with incoming trunk circuits, comprising the incoming trunk circuit 241 and a group of direct traffic trunk circuits, including the direct traffic trunk circuit 242. In addition, a group of exchange switches. delayed calls, including switch 234, is accessible to the various answering switches 1081, etc ... Direct traffic trunk circuits 242, etc ... are accessible to special selectors 226, etc ... and to a group of special input selectors, including selector 251. In addition, special selectors 251, etc., have access to the junctions leading to information table 227.

   One end of trunk line 101 terminates on trunk circuit 211 individually joined to special input selector 2510
One end of trunk line 102 terminates at a repeater circuit 303 with an individual tone system 304 and an input trunk selector 323, individually connected. Finally, one end of the trunk line 105 terminates on a repeater circuit 306 provided with an individual tone device 307 and a trunk selector.

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 arrival 326, individually connected. In addition, the AT office includes a group of national trunk circuits, including circuit 1100, which has an individual searcher 1150 and an individually connected trunk selector 1200.

   In addition, the AT desk includes a group of recorder-translators, including the recorder-translator 1300, accessible to researchers 1150, etc. Finally, the AT desk includes a group of desktop arrival selectors, including selector 332, and a group of access selectors, including selector 331. Response switches 1081, etc ..., have access to incoming trunk circuits 241, etc ... and to trunking circuits with traffic direct 242, etc ... Call switches 1082, etc ..., and delayed call switches 234, etc ..., have access to national interurban circuits 1100, etc ..., to selectors access 331, etc ..., to repeater circuits 301, etc ..., to repeater circuits 303, etc ..., and to repeater circuits 306, etc ...

   The incoming trunk selectors, 321, 323, 326, etc ..., have access to trunk circuits 211, etc ..., to incoming trunk circuits 241, etc ..., and to input selectors of office 332, etc ... The input selectors of office 332, etc ..., have access to the first selectors 252, etc ... while the access selectors 331, etc ..., have access to the circuits of junctions 211, etc ..., and to office input selector 332, etc ... The trunk selectors 1200 have access to repeater circuits 301, etc ..., to repeater circuits 303, etc ..., and to repeater circuits 306, etc ...



   The subscriber line 601 terminating at the subscriber station T4 of the office GH terminates on a line circuit 602 provided with a distributor 603 and is accessible to a group of researchers including the finder 604, the latter being wired in pair with the first local selector 605. In addition, the subscriber line 601 is accessible to a group of connectors, including the trunk connector 654, accessible in turn to a group of second selectors 653, accessible in turn to a group of first selectors, including the first selector 652. The first local selector 605 is accessible to a group of special selectors, including the selector 606, which in turn has access to a group of junctions going to an information table 607.

   In addition, the GH office includes an automatic trunk panel 630 with a series of attendant positions, including the first attendant position 631 and a traffic distributor 645. The attendant position circuit 631 has an attendant position circuit. series of interior junctions, one of which is shown and has an answer switch 632 and a call switch 633, as well as an associated starter circuit 643 and an interior splice distributor 6440 This attendant position circuit has furthermore a set of keys 635, an associated transmitter control circuit 636 and a connected transmitter 637, as well as a connected recorder 638.

   Trunk switchboard 630 is also associated with a group of incoming trunk circuits, including circuit 641, and a group of direct traffic trunk circuits, including circuit 642. In addition, a group of delayed call switches, including switch 634, is accessible to the various response switches 632, etcooo Direct traffic trunk circuits 642, etc ... are accessible to special selector 606, etc ..., and to a group of special selectors input, including selector 527; in addition, the special input selectors 527, etc., have access to the junctions going to information table 607.

   One end of trunk line 107 terminates on trunk circuit 511 individually connected to special input selector 527.



   One end of trunk line 102 terminates in a repeater circuit 521 with an individual tone device 522 and an input trunk selector 525, individually connected. Likewise, one end of trunk line 104 terminates at a repeater circuit 523 provided with an individual tone device 524 and an input trunk selector 526. Likewise, one end of trunk line 108 terminates at a repeater circuit 541 provided with an individual tone device 542 and an input trunk selector 543, individually connected. Likewise, one end of trunk line 109 terminates on a repeater circuit 546 provided with an individual tone device 547 and an input trunk selector 548.

   In addition, the GH office has a group of

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 national trunk circuits, including circuit 529, the latter comprising an individual searcher 530 and an individually connected trunk selector 549. The GH office also includes a group of recorder-translators, including the recorder-translator 531, accessible to researchers 530, etc. Finally, this office includes a group of entry code selectors, including selectors 528, and a group of access selectors, including selector 651.

   Answer switches 632, etc ... have access to incoming trunk circuits 641, etc ..., and direct traffic trunk circuits 642, etc ... Call switches 633, etc. .., and delayed call switches 634, etc ..., have access to national trunk circuits 529, etc ..., access-selectors 651, etc ..., repeater circuits 521 , etc ..., to repeater circuits 541, etc ..., to repeater circuits 523, etc ..., and to repeater circuits 546, etc ... The input trunk selectors 525, 526, 543 , 548, etc ... have access to junction circuits 511, etc ...

   to incoming trunk circuits 641, etc ..., to entry office selectors 528, etc ..., and to national trunk circuits 529, etc ... to entry office selectors 528, etc ... , have access to the first 652 selectors, etc ..., while the 651 access selectors, etc ..., have access to trunk circuits 511, etc ..., and to entry office selectors 528, etc ... Long distance selectors 549, etc ..., have access to repeater circuits 521, etc ..., 541, etc ..., 523, etc ..., 546, etc ...



   The subscriber line 801 terminating at the subscriber station T6 of the office RL terminates on a line circuit 802 provided with a distributor 803 and is accessible to a group of researchers including the searcher 804, wired in pair with a first selector local 805. The subscriber line 801 is also accessible to a group of trunk connectors, including connector 858, itself accessible to a group of second selectors, including the second trunk selector 857, accessible in turn to a group of first selectors, including the first selector 856. The first local selector 805 has access to a group of special selectors, including the selector 806, which itself has access to a group of junctions going to an information table 807.

   The RL office also has an automatic trunk switchboard 830 'with a series of attendant positions, including the first attendant position circuit 831, and a traffic distributor 845. The operator position circuit. operator 831 comprises a series of interior junctions, one of which is shown and has an answer switch 832 and a call switch 833 as well as an associated starting circuit 843 and an interior junctions distributor 844. The position circuit Operator 831 comprises a set of keys 835, an associated transmitter control circuit 836 and a connected transmitter 837, as well as a connected recorder 838.

   The trunk switch board 830 is also associated with a group of incoming trunk circuits, including circuit 841, and a group of direct traffic trunk circuits, including circuit 842. In addition, a group of delayed call switches , including switch 834, is accessible to the various response switches 832, etc. Direct traffic trunk circuits 842, etc., are accessible to special selectors 806, etc., and to a group of Special input selectors, including selector 854. Special selectors 854, etc ..., have access to the junctions going to information table 807.

   One end of the rush-line. tion 112, terminates on a junction circuit 811, individually connected to the special input selector 854.



   One end of trunk line 108 terminates in a repeater circuit 821 with an individual tone device 822 and an input trunk selector 823. Likewise, one end of trunk line 111 terminates on a repeater circuit 825 provided with an individual tone device 826 and an input trunk selector 827, individually connected. The RL office also includes a group of national trunk circuits, including circuit 850, provided with an individual searcher 851 and a trunk selector 860, individually connected.

   This office also comprises a group of recorder-translators, including the recorder-translator 852, accessible to researchers 851, etc. 'Finally, this office comprises a group of input desk selectors including the selector 855 ,

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 and a group of access selectors, including selector 853. Answer switches 832, etc ..., have access to incoming trunk circuits 841, etc.,., and direct traffic trunk circuits 842, etc ...

   Call switches 833, etc., and delayed call switches 834, etc., have access to national trunk circuits 850, etc., access selectors 853, etc. ,., to repeater circuits 821, etc ..., and 825, etc ...



  Entry long distance selectors 823, 827, etc ..., have access to trunk circuits 811, etc ..., to incoming trunk circuits 841, etc ..., and to office entrance selectors 855, etc ... The 855 entry office selectors, etc ..., have access to the first 856 selectors, etc ..., while the 853 access selectors, etc ..., have access to the trunk circuits
811, etc ..., and 855 entry desk selectors, etc ... 860 trunk selectors have access to repeater circuits 821, etc ..., and 825, etc ...



   At the ML office, one end of the trunk line 105 terminates on a repeater circuit 401 with an individual tone device 402 and an input trunk selector 403, individually connected.



  Likewise, one end of trunk line 106 terminates in a repeater circuit 404 with an individual tone device 405 and an input trunk selector 406, individually connected. The input long distance selectors 403, etc ..., have access to: - repeater circuits 404, etc ..., while the entry long distance selectors 406, etc ..., have access to the repeater circuits 401, etc. ..



   At office OB, one end of trunk line 103 terminates at a repeater circuit 410 provided with an individual tone device 411 and an input trunk selector 412, individually connected. Likewise, one end of trunk line 106 terminates on a repeater circuit 413 provided with an individual tone device 414 and an input trunk selector 415, individually connected. Finally, one end of trunk line 104 terminates at a repeater circuit 416 provided with an individual tone device 417 and an input trunk selector 418, individually connected.

   The input long distance selector 412, etc ..., and the input long distance selectors 415, etc ..., have access to the repeater circuits 416, etc ..., while the entry long distance selectors 418, etc. ..., have access to repeater circuits 410, etc ..., and 413, etc ...



   At office TS, one end of trunk line 109 terminates at a repeater circuit 721 with an individual dial tone device 722 and an input trunk selector 723, individually connected. Likewise, one end of trunk line 110 terminates at a repeater circuit 725 provided with an individual tone device 726 and an input trunk selector 727, individually connected. Input long distance selectors 723, etc ..., have access to repeater circuits 725, etc ..., while input long distance selectors 727, etc ..., have access to repeater circuits 721, etc ...



   At the VR office, one end of trunk line 110 terminates at a repeater circuit 731 with an individual tone device 732 and an input trunk selector 733, individually connected. Likewise, one end of trunk line 111 terminates at a repeater circuit 735 with an individual tone device 736 and an input trunk selector 737 individually connected. Input toll selectors' 733, etc ..., have access to repeater circuits 735, etc ... while entry toll selectors 737, etc ... have access to repeater circuits 731, etc. .



   Chapter 2.



   THE EQUIPMENT INCORPORATED IN THE TELEPHONE SYSTEM,
Preferably, the automatic long distance switchboards 1000, 630 and 830, arranged respectively in the long distance offices AT, GH and RL, are substantially identical to that described in US Pat. No. Harvey W. Balzer No. 20353,212 granted on July 11, 1944, except certain secondary modifications which have been made to the circuits of o-

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 Periators 1003, etc ..., to answering switches 1081, etc ..., and calling switches 1082, etc ..., as shown in fig. 10.

   More specifically, each attendant position circuit 1003, etc., is slightly modified by the addition of a national trunk key K1002, a national trunk relay R1025, a rear dialing relay. or answer switch R1010 and two control relays R1015 and R1020, while each answer switch 1081, etc ..., and each call switch 1082, etc ..., are modified slightly so as to include respective test leads C1033 and C1032, for a purpose which will be fully explained below.

   In addition, each delayed call switch 234, etc ...;, has been modified slightly in accordance with the modifications made to each of the call switches 1082, etc ..., for the purpose stated and explained more fully in after.

   In addition, and as shown in fig. 10, the call switch 1082 comprises a Strowger mechanism fitted with an M1071 ascension solenoid, an M1072 rotation solenoid and an M1073 release solenoid, as well as a relay group comprising one line relay R1040, one bonding relay R1050 and one connection relay R1060. Thus, for example, it will be understood that the trunk switch board 1000 of the AT office has the attendant position circuit 1003, the answering switch 1081, the call switch 1082, the delayed call switch 234, the call switch key set 235, the transmit control circuit 236, the transmitter 237, the recorder 238, the incoming trunk circuit 241, the direct traffic trunk circuit 242,

   the starting circuit 243, the internal junction distributor 244, the traffic distributor 245, corresponding respectively to these same elements, as described in the aforementioned Balzer patent.



   Preferably, the repeater circuits 301, etc. of the office AT, the repeater circuits 521, etc., of the office GH and the various other corresponding repeater circuits of the other offices are identical to those shown in FIGS. 4-6 Read the related US patent application of John Wicks and Otho Do Grandstaff, Ser. No. 749.758 filed May 22, 1947.

   This repeater circuit described in the aforementioned patent application by Wicks and Grandstaff constitutes a direct improvement over the repeater circuit described in American patent John Wicks No. 2,155,176, granted April 18, 19390 Likewise, it It is preferable that the tone devices 302, etc., 522, etc., associated respectively with the repeater circuits 301, 521, etc., be identical to those described in the related US patent application by Otho D.



  Granastaff Ser. No. 738,194 filed March 29, 1947. This tone device described in the aforementioned Grandstaff patent application constitutes a direct improvement over the tone device described in US Patent Otho D. Grandstaff No. 2,159,081 issued on 23 May 1939. More specifically, each pair of repeater circuits 301-521, etc., and associated pairs of tone devices 302-522, etc., are of the energized, voice-controlled type , while trunk lines 102, etc., terminating on the respective pairs of repeater circuits, may include voice-frequency repeaters, not shown, of the vacuum-tube-to-tube-type, self-controlling. volume.

   In other words, the repeater circuits of a pair are able to operate in conjunction with a trunk line which in turn includes voice frequency and vacuum lamp tube repeaters.



   Each subscriber line in each office is provided with an automatic telephone set, and the various searchers and selectors are of the conventional Strowger type, unless otherwise specified. Likewise, in each office, the junction circuits 211, etc., the distributors 223, etc., and the line circuits 222, etc., may be of any suitable type. In addition, in each long distance office, inquiry table 227, etc., can be of any suitable manual type. It will be noted in passing that, in each office, the first selectors 225, etc., are of the conventional type, falling after the first digit.



   Preferably, the national trunk circuits 1100, etc ... of the various trunk offices are identical. As shown in fig. 11, the national intercity circuit 1100 comprises a group of relays, one of which is re-

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 lines R1110, one bonding relay R1120, one connection relay R1130 and one connection cut-off relay R1140, while the individually associated 1150 seeker includes five individual wipers 1151 to 1155 included, fitted with a rotation electro associate M1156.



   Preferably, the long distance selectors 1200, etc., individually associated with the national long distance circuits 1100, etc., of the various offices, are identical. As shown in fig. 12, the interurban selector 1200 comprises a group of relays, including an R1210 line relay, an R1220 bonding relay, an R1230 series relay, an R1240 step-action relay and an R1250 connection relay. In addition, the trunk selector 1200 has a Strowger mechanism comprising an M1225 ascension electro, M1226 rotation electro and M1228 release electro. Associated with the Strowger mechanism are two sets of springs or switching contacts S1261 and 51233, which are actuated when the slide carriage is moved vertically away from its vertical rest position.

   With this mechanism are also associated two sets of switching contacts S1234 and S1235, actuated when the carriage is separated by eleven rotating steps with respect to its horizontal rest position.



   Preferably, the recorder-translators 1300, etc., provided in the various offices are identical. As shown in figs. 12 to 15 inclusive, the recorder-translator 1300 comprises three network recorders A1, A2, and A3, called to record respectively the first, the second, and the third digits of the three-digit network code, thus. if that three office code recorders 01, C2 and 03, designed to record the first, second and third digits of the three-digit office code, and finally ', respectively. four digital recorders N1, N2, N3 and N4, called to record respectively the first., the second, the third and the fourth digits of a four-digit line number.

   The first network code recorder A1 is a small switch comprising a single wiper A11, a control solenoid A12, a release solenoid A13 and a set of working switching springs A15.



  The second network code recorder A2 is a small switch comprising two wipers A21 and A24, a control solenoid A22, a release solenoid A23 and a set of working switching springs A25, and, The network code A3 is a small switch comprising, a single wiper A31, a control solenoid A32, a release solenoid A33 and a set of working switching springs A35. The first office call sign recorder 01 is a small switch consisting of a single slider 011, a control solenoid 012, a release solenoid 013 and two sets of work switching springs 015 and 016.

   The second office code recorder 02 is a small switch comprising two wipers 021 and 024, a control solenoid 022, a release solenoid 023 and a set of work switching springs 025; and, the third office code registrar 03 is a small switch comprising a single wiper 031, a control solenoid 032, a release solenoid 033 and a set of work switching springs 035. The first registrar digital N1 is a small switch comprising a single wiper N11, a control electro N12, a release electro N13 and two sets of working switching springs N14 and N15.

   The second digital recorder N2 is a small switch comprising a single slider N21, a control solenoid N22, a release solenoid N23 and a set of working switching springs N25; and the third digital recorder N3 is a small switch comprising a single slider N31, a control solenoid N32, a release solenoid N33 and a set of working switching springs N35; and, the fourth digital recorder N4 is a small switch comprising a single trotter N41, a control solenoid N42, a release solenoid N43, and a set of working switching springs N45.



   On the other hand, the recorder-translator 1300 includes a Strowger type AC network code composite switch, comprising two wipers AC1 and AC2, an AC3 ascension electro, an AC4 rotation electro and a release AG5, A set of working switching springs AC6, associated with the wiper carriage of the Strowger mechanism, is actuated when this

  <Desc / Clms Page number 11>

 carriage is separated by a vertical step from its vertical rest position.

   The AC switch is moved vertically step-by-step according to the number recorded in the first network code recorder A1, and is moved horizontally step by step according to the number registered in the third network code recorder A3 and, one of the two wipers of the AC network code composite switch is selected according to the number stored in the third network code recorder A2. Likewise, the recorder-translator 1300 includes a Strowger-type desktop indicative composite switch, comprising eight wipers OC1 to OC8 included, an ascension electro OC9, a rotation electro OC10, and an electro release OC11.

   A set of OC12 working switching springs is associated with the strowger mechanism slider carriage and is actuated when the latter is moved one step away from its vertical rest position. The composite OC office code switch is not advanced. stepwise in the vertical direction according to the digit recorded in the first office code recorder 01 and is advanced stepwise in the rotary direction according to the digit recorded in the third office code recorder O3; and, one of the eight rubbers of the composite office code switch OC is selected in accordance with the digit stored in the second office code recorder O2.

   Further, the recorder-translator 1300 includes a routing-network switch AR controlled by the composite AC-network code switch. The network routing switch AR is of the Strowger type comprising a vertical control slider AR1 and seven rotary sliders AR2 to AR8 included, an ascension electro AR9, an AR10 rotation electro and an AR11 release electro. A set of working switching springs AR12, associated with the sliding carriage of the Strowger mechanism, is actuated when the latter is moved one step away from its vertical rest position.

   Likewise, the recorder-translator 1300 includes an OR routing-office switch, controlled by the OC office-sign composite switch. The OR-routing-office switch is of the Strowger type with a OR1 vertically controlled slider and seven OR2 to OR8 rotary sliders included, an OR9 ascension electro, an OR10 rotation electro and an OR11 release electro. A set of working switching springs OR12, associated with the sliding carriage of the Strowger mechanism, is actuated when the latter is moved a vertical step away from its vertical rest position.



   In addition, the 1300 recorder-translator has a small RS recorder sequential switch fitted with two RS1 and RS2 wipers, an RS3 control solenoid, an RS4 release solenoid and a set of res. - RS5 working switching spells. The RS recorder sequential switch has access to the control electros A12, etc ..., of the ten personal recorders A1, etc ... In addition, the recorder 1300 includes an SS transmission sequential switch of the rotary type comprising three sliders SS1 to SS3 included, an SS4 control electro and a set of SS6 working switching springs.

   The SS transmit sequential switch has selective access to the five included wipers AR4 and AR8, of the AR network routing switch, and to the five OR4 to OR8 inclusive wipers, of the OR office-routing switch, as well as a access to the slider A11, etc ..., of the ten individual recorders Al, etc ... In addition, the recorder-translator 1300 comprises a dialing switch-transmitter DS of the rotary type comprising two sliders DS1 and DS2 and an electro DS3 command. The DS dial transmitter-switch has access to the ten marker conductors forming part of an associated marker cable 1344 and is used to monitor the value of each digit sent, as explained more clearly below.



   Finally, the 1300 recorder-translator includes a relay group comprising an R1310 series relay, an R1320 step-action relay, an R1330 network relay, an R1325 erase relay, an R1080 rise test relay, a relay R1085 rotation test relay, one office relay R1430, one climb test relay Rl180, one rotation test relay Rl185, two counting relays R1510 and R1520, one busy relay R1530, one attack relay R1540 , a shunt relay R1550 and an emission stop relay R1560, To loggers-translators 1300, etc ..., of the group is also associated a chain circuit comprising a to-

  <Desc / Clms Page number 12>

 tale R1270 used to signify the occupation of all national interurban circuits 1100, etc ..., of the group,

   when all the recorder-translators 1300, etc., of this group are busy, as explained more fully below. Finally, the recorder-translator 1300 includes a motor driven pulse emitting cam 1566, not shown, this cam being capable of emitting approximately ten pulses per second, as well as two pulse cams 1088 and 1188, powered by motors not shown, and capable of emitting pulses at a frequency of approximately 15 to 20 pulses per second.



   The connections and arrangement of the apparatus included in this telephone system will be better understood by considering the establishment of communications requiring the intervention of the various offices or exchanges.



   Chapter 3.



     DIRECT TRAFFIC COMMUNICATIONS AND INQUIRIES
AT THE 3R AND AT OFFICES.



   It will now be assumed that it is a question of establishing a communication between the calling subscriber station T1 of the office BR and the automatic long distance switchboard 1000 of the int @rbain office AT. In this case, the subscriber of the calling station T1 first goes off hook, thus controlling the circuit of the lines 202 on the subscriber line 201, so that the distributor 203 is actuated so as to perform a free searcher, for example the seeker 204, in order to cause the latter to search for subscriber line 201.

   The subscriber of the calling station Tl then forms the operator code 110, so that the first local selector 205 responds to the first digit 1 and then falls back to its initial position, after which it responds to the second digit 1. , to select the group of trunk circuits, including circuit 210, and then to select a free trunk circuit in this group. In the event that the first local selector 205 selects the junction circuit 210, the junction circuit 211 is controlled by the junction line 101 so as to drive the special input selector 251. The latter reacts to the third digit 0, to select the group of direct traffic trunk circuits, including circuit 242, and then. to select a free circuit in this group.

   In the event that the special input selector 251 selects the direct traffic trunk 242, the starter circuit 243 controls the traffic distributor 245, so as to assign an available operator position to the automatic trunk switch 1000. When the first attendant position circuit 1003 is assigned, the interior junction distributor 244 is controlled to assign one of the interior junctions associated with it. for example the junction comprising the answer switch 1081 and the call switch 1082. The circuit. start switch 243 and inside trunk distributor 244 then control response switch 1081 to cause it to select direct traffic trunk 242.

   The operator of the position circuit 1003 then answers the call, talks with the subscriber of the calling station Tl, and learns the nature of the desired communication.



   In view of the foregoing, it will be understood that a call initiated at the calling subscriber station T2 of the long distance office AT can end at the automatic long distance table 1000 of this office in a substantially identical manner. More specifically, the call is initiated from the calling subscriber station T2 by the formation of the operator code 110, and can be answered at the first operator position 1003 of the operator. automatic trunk switch 1000, this connection comprising subscriber line 221, line circuit 222, finder 224, first local selector 225, special selector 226, direct traffic trunk 242 and answering switch 1081 .

   On the other hand, the operator of the position circuit 1003 of the automatic trunk panel 1000 is informed by the subscriber of the calling station T2 of the desired destination of the communication,
Further, and in view of the foregoing, it will be understood that an inquiry call can be made from the calling subscriber station T1 of the office BR to the inquiry table 227 of the long distance office AT in a substantial manner. identical, following the formation of the informative code

  <Desc / Clms Page number 13>

 ment 112.

   By activating this call, the special input selector 251 reacts to the third digit 2, to select the group of junctions going to the information table 227, and then to select a free junction in this group, The operator of this table answers on the call and converses with the subscriber of the calling set Tl, offering him all the information and assistance possible.



   Likewise, a request for information can be directed from the calling subscriber station T2 of the long distance office AT to the information table 227 of this office, in a substantially identical manner, following the formation of the code. of information table 112. In making this call, the special selector 226 responds to the third digit 2, to select the group of trunks going to the information table 227, and then to select a free trunk in that group. The way in which the attendant then answers this call from information table 227 is the same as that described above,
Chapter 4.



   DIRECT TRAFFIC AND INFORMATION CALLS TO GF AND GH OFFICES.



   It will now be assumed that a call must be made from the calling subscriber station T3 of the office GF to the automatic trunk table 630 of the long distance office GH. In this case, the subscriber of the calling station T3 first initiates the call by controlling the line circuit 502 through the subscriber line 501, so that the distributor 503 is controlled in such a way. assigning a free seeker, for example seeker 504, in order to cause the latter to search for subscriber line 501. The subscriber of the calling station T3 then forms the operator code 110, so that the first selector local 505 reacts to the first digit 1 and falls back, to react then to the second digit 1 in order to select the group of trunk circuits, including circuit 510, and then, to select a free circuit in this group.



  Assuming that the first local selector 505 selects the trunk circuit 510, the trunk circuit 511 is controlled on the trunk line 107, to drive the input special selector 527. The latter then reacts to the third digit 0, to select the direct traffic trunk group, including the forward traffic trunk 642, and then to select a free direct traffic trunk from that group. Assuming that the input special selector 527 selects the direct traffic trunk 642, the starter circuit 643 controls the traffic distributor 645, to assign an available operator position from the automatic trunk switch 630.

   Assuming that the first attendant position circuit 631 is assigned, the trunk distributor 644 is controlled to assign one of the associated trunks, for example the interior trunk comprising the answer switch 632 and the call switch. 6330 The starter circuit 643 and the internal trunk distributor 644 then control the answer switch 632, in order to cause it to select the direct traffic trunk circuit 642. The operator of the position circuit 631 then responds to the call. call and converse with a subscriber of the calling station T3 and thus learns the destination of the desired communication.



   It emerges from the foregoing that a call made from the calling subscriber station T4 of the long distance office GH can be routed to the automatic long distance table 630 of this office, in a substantially identical manner.



  More specifically, the call is routed from the calling subscriber station T4 following the formation of the operator code 110 and can be answered from the first operator position 631 of the automatic trunk table 630, which connection can be answered. include subscriber line 601, line circuit 602, finder 604, first local selector 605, special selector 606, direct traffic trunk 642, and answer switch 632. On the other hand , the operator of the position circuit 631 of the automatic toll table 630 is informed by the calling subscriber of the set T4 as to the nature of the required communication.



   In addition, it emerges from the foregoing that a request for information can be directed from the calling subscriber station T3 of the GF office to the station.

  <Desc / Clms Page number 14>

 information table 607 of the long distance office GH, in a substantially identical manner, following the formation of the information table code 112. During the routing of this call, the special selector 527 reacts to the third digit 2, to select the group of trunks going to the information table 607 and to select a free trunk in this groupo The operator of the information table 607 then answers the call, and converses with the subscriber of the calling set T3, offering him all the information and assistance possible.



   Likewise, a request for information can be directed from the calling subscriber station T4 of the long distance office GH to the information table 607 of this office, in a substantially identical manner, following the formation of the code. of information table 112. When this call is routed, the special selector 606 reacts to the third digit 2, to select the group of trunks going to the information table 607 and then to select a free trunk in this trunk. group. The manner in which the operator of the information table 607 responds subsequently to this call is identical to that described above.



   Chapter 5.



   DIRECT TRAFFIC AND OFFICE INQUIRIES
RG AND RL.



   It will now be assumed that a call is to be directed from the calling subscriber station T5 of the RG office to the automatic trunk table 830 of the long distance office RL. In this case, the subscriber of the calling station T5 first initiates the call which controls the line circuit 702 on the subscriber line 701, so that the distributor 703 is commanded to assign a free pager, for example the seeker 704, in order to get the latter to search for subscriber line 701. The subscriber of the calling station T5 then forms the operator code 110, so that the first local selector 705 responds to the first digit 1 and drops out, and then reacts to the second digit 1, to select the group of trunk circuits, including circuit 710, and then to select a free trunk circuit in this group.

   Assuming that the first local selector 705 selects the junction circuit 710, the junction circuit 811 is checked on the junction line 112, to drive the special input selector 854. The latter then reacts to the third digit 0, to select the group of direct traffic trunk circuits, including circuit 842, and then to select a free direct traffic trunk in that group. Assuming that the input special selector selects the direct traffic trunk circuit 842, the starter circuit 843 controls the traffic distributor 845, to assign an attendant position available in the automatic trunk switch board 830.



  Assuming that the first attendant position circuit 831 is assigned, the interior trunk distributor 844 is controlled to assign one of the interior trunks associated with it, for example the trunk comprising the answer switch 832 and the call switch 833. The start circuit 843 and the internal trunk distributor 844 then control the answer switch 832, to cause it to select the direct traffic trunk circuit 842. The operator of the posit ion circuit 831 then responds to the call. 'call and converse with the subscriber of the calling station T5, learning the destination of the desired communication.



   In view of the above, it will be understood that a call initiated at the calling subscriber station T6 of the long distance office RL can be sent to the automatic trunk table 830 of that office, in a substantially identical manner.



  More specifically, this call leaves the calling subscriber station T6 following the formation of the operator code 110, and can be answered by the first operator position 831 of the table. automatic trunk 830, which connection may include subscriber line 801, line circuit 802, finder 804, first local selector 805, special selector 806, direct traffic trunk 842 and answer switch 832.

   On the other hand, the operator of the position circuit 831 of the automatic trunk panel 830 is informed by the subscriber.

  <Desc / Clms Page number 15>

 born caller from set T6 as to the desired destination of the communication,
In addition and in view of the above, it will be understood that a request for information can be directed from the calling subscriber station T5 of the office RG to the information table 807 of the long distance office RL in a substantially identical manner, following the formation of the 1120 information prefix When initiating this call, the special input selector 854 reacts to the third digit 2, to select the trunk group going to the information table 807, and then to select a free junction in this group.

   The operator of the information table 807 then answers the call and converses with the calling subscriber of set T5, offering him all possible information and assistance.



   Likewise, a request for information can be initiated from the calling subscriber station T6 of the long distance office RL to the information table 807 of this office, in a substantially identical manner, following the formation of the code. 112. When initiating this call, the special selector 806 responds to the third digit 2, to select the trunk group going to the information office 807, and then to select a free trunk in that group. The manner in which the operator of the information table 807 responds to the result of this call is the same as that described above.



    Chapter
INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN SWITCH PANEL
FROM THE AT OFFICE TO THE SUBSCRIBER STATIONS OF THE GF OFFICE.



   Assume now that the operator of the position circuit 1003 of the automatic trunk panel 1000 of the AT trunk office has answered a direct traffic call using the answering switch 1081, and which is to be routed to the subscriber station. requested T3 from office GF.



  In this case, the operator of the calling position circuit 1003 first activates the interurban dial key forming part of her position equipment, in order to bring the call switch 1082, connected to the position circuit. - tion 1003, to operate at this time automatically and to select the group of national trunk circuits, including the national trunk circuit 1100, and then a free national trunk in this group. Assuming that call switch 1082 selects national trunk 1100, associated finder 1150 operates to select a free recorder-translator from the associated group, eg, recorder-translator 1300.



  When the call was answered by the operator of the position circuit 1003, the sender control circuit 236 was automatically connected to this position circuit, so that the Sender or transmitter 237 and recorder 238 were armed and keypad 235 was conditioned to control recorder 238.



   Therefore, at this moment, the operator of the position circuit 1003 operates the keypad 235 according to the national number of the called subscriber set T3, that is to say 614-475-12340 This number includes the code network 614, office code 475 and line number 1234.

   When the operator of the position circuit 1003 activates the keypad 235 in accordance with the ten individual digits of the national number, the recorder 238 reacts and records the aforementioned individual digitsa This recorder is of the reflex or forward type, reacting to the first digit recorded , to control the sender or sender 237, so that the first digit stored is transmitted through the call switch 1082 to the national trunk circuit 1100, whereupon this circuit repeats the first digit on the searcher 1150 to the recorder-translator 1300, so that this figure is recorded in the latter.

   The other nine digits are stored in succession in recorder 238, in order to determine the operation of sender 237 to send these digits, as explained above, to recorder-translator 1300. L The recorder 238 is controlled directly from the keypad 235, to record the aforementioned ten digits and to command the sender 237 to send these ten digits, without translation.



  Thus, the ten digits of the national number dialed by the keypad 235 are in-

  <Desc / Clms Page number 16>

 recorded directly in recorder 238 and transmitted directly by sender 237, and finally recorded again in recorder-translator 1300. After the operator of position circuit 1003 has recorded the ten digits of the number national, it activates the red button of the keyboard 235, so as to condition the transmitter control circuit 236, in order to cause the subsequent release of this circuit, of the sender 237 and of the recorder 238, when the last digit stored in logger 238 was sent by sender 237.



   The recorder-translator 1300 responds to network code 614 to determine whether the requested trunk network is far or near to the trunk network 218 of the requesting trunk office AT. In the event that the recorder-translator 1300 determines that the requested trunk network is remote from the trunk 218 of the calling trunk AT office, it will be controlled to transmit one or more network switch digits, in order to direct the connection to a long distance office in a tandem long distance network, and then retransmit the national long distance number, as stored, so that subsequent routing of the connection - can be performed under the control of the switchgear of the interurban office of the aforementioned tandem interurban network.

   On the other hand, in case the recorder-translator 1300 determines that the requested trunk network is close to the trunk network 218 of the requesting office AT, it will react to the callsign of the requested office in order to. transmit one or more office switch digits. In this case, the recorder-translator 1300 also determines whether the office code, as recorded, is needed for the subsequent routing of the connection, and transmits this code as recorded, if it is necessary, and then the number of the requested line.

   Therefore, in the case where it has been determined that the requested trunk network is close to the trunk network 218 of the requesting trunk office AT, the recorder = translator-translator 1300 completes the routing of the connection directly to subscriber set requested
In the present example, the requested trunk network 614 is close to the trunk network 218 of the calling trunk AT office. Thus, the recorder-translator 1300 routes the connection directly to the called subscriber station T3 of the called office GF of the requested trunk network-614.



  More specifically, the recorder-translator 1300 registers the national long distance number 614-475-1234 and initiates the transmission of the office code digits, as indicated above. In this example, there are three routes between the requesting toll office AT and the toll office GH of the requested toll network 614, these routes respectively constituting a first, second and third choice route.

   The first choice or normal route represents the direct route between the AT trunk office and the GH trunk office via a trunk group comprising line 102; the second choice routing passes through the office OB located between the interurban office AT and the interurban office GH, via groups of interurban lines, comprising respectively the interurban lines 103 and 104; the third choice routing goes through the ML and OB offices located between the AT interurban office and the GH interurban office, through groups of interurban lines, comprising respectively lines 105, 106 and 104.



   Therefore, the recorder-translator 1300 tends to obtain the first choice channel, by not transmitting any office routing digits, followed by the 475 code of the requested office and the number 1234 of the line. . If this first choice or normal channel is available, the interurban selector 1200 can react to the first office code digit 4, to select the repeater circuit group, including circuit 301, and then a free circuit. in this group. The trunk selector 1200 may elect the repeater circuit 301 such that the latter controls the repeater circuit 521 on the trunk line 102, to drive the input trunk selector 525.

   The latter can react to the second office code number 7, to select the group of trunk circuits, including circuit 511, and then to select a free circuit in this group. The

  <Desc / Clms Page number 17>

 Entrance trunk selector 525 can select trunk circuit 511, so that the latter controls trunk circuit 510 on trunk line 107, so as to drive office entrance selector 515. The latter can react to trunk line 107. third digit 5 of the office code, to select a group of first selectors, including selector 516, and then to select a first free selector in this group. The office input selector 515 can select the first selector 516.

   The latter can react to the first numerical digit 1, to select a group of second selectors, including the selector 515, and then to select a second free selector in this group. The first selector 516 can select the second selector 517. The latter can react to the second numerical digit 2, to select the group of connectors comprising the connector 518, and then a free connector in this group. The second selector 515 can choose the connector 518. The latter reacts to the third digital digit 3 and then to the fourth digital digit 4, to select the subscriber line 501 going to the called subscriber station T3.

   This last connector then determines by test whether this subscriber line is free or busy, by sending an inrush current on this line if this set is free at this time, and by ensuring the return of a signal. busy on the switch train in case this line is busy at this time. If the set is free, the inrush current is sent to the subscriber line 501 from the connector 518; and, when the subscriber of the called station T3 answers the call, a connection is established between the calling operator position circuit 1003 of the automatic trunk switchboard 1000 of the trunk office AT and the called subscriber station. T3 from office GF.

   The operator of the position circuit 1003 notifies the subscriber of the called subscriber station T3 of the long distance call which is intended for him and then operates his position device in order to route the communication by the telephone. interior trunk comprising answering switch 1081 and calling switch 1082, to exclude the attendant position circuit 10030
In the event that, during the operation of the recorder-translator 1300, the trunk selector 1200 encounters a state of full occupation of trunks on the normal channel, following the first digit 4 of the office code, this recorder-translator is commanded to attempt the second choice route, by transmitting the office routing digit 7 followed by the requested office code 475 and the requested line number 1234.



  In the event that the second choice channel is available, switching takes place in a manner substantially identical to that described above, and may include trunk selector 1200, repeater circuit 303, trunk line 103 , the repeater circuit 410, the input trunk selector 412, the repeater circuit 416, the trunk line 104, the repeater circuit 523, the input trunk selector 526, and the trunk circuit 511, as well. than the other elements of the train of switches going to the called subscriber station T3.

   When, while operating the recorder-translator 1300, the trunk selector 1200 encounters a state of full trunk busy on the second choice channel, following the first office routing digit 7, the recorder-translator 1300 is ordered from. to attempt the third choice route, transmitting the office routing digits 8 and 5, followed by the requested office code 475 and the requested line number 1234.

   If this third choice route is available, the connection is made in a substantially identical manner to that described above, and may include trunk selector 1200, repeater circuit 306, line trunk 105, repeater circuit 401, input trunk selector 403, repeater circuit 404, trunk line 106, repeater circuit 413, input trunk selector 415, repeater circuit 416, trunk line 104, repeater circuit 523, ingress trunk selectors 526, and trunk circuit 511, as well as other elements of the switch train going to called subscriber station T3.

   If, during the operation of the registrar-translator 1300, the trunk selector 1200 encounters a state of full trunk occupation on the third choice channel, following the first office routing digit 8, the recorder-translator 1300

  <Desc / Clms Page number 18>

 is not commanded to attempt a route of another choice. More specifically, if the trunk selector 1200 encounters a state of total occupation of the junctions on the third choice channel, this selector returns a signal of total occupation of the junctions to the operator position circuit 1003 of the automatic trunk panel. 1000, indicating the state of affairs described.



   In addition, if, during the routing of the call on any of the channels, a subsequent trunk selector acting on this channel encounters a state of total occupation of the junctions, a corresponding signal of total occupation of the junctions. trunks will be returned to the operator position circuit 1003 of the automatic trunk table 1000, to indicate this situation. Finally, if, during the establishment of a connection, a trunk connector having access to the requested subscriber line, establishes by test that this line is busy, a corresponding line busy signal will be sent on the line. connection to the operator position circuit 1003 of the automatic trunk panel 1000, in order to indicate this situation.

   The total trunk busy signal has 120 pulses per minute, while the line busy signal has 60 pulses per minute. Therefore, the supervisory lamp of the operator position circuit 1003 of the automatic trunk board 1000 turns on either at the frequency of 120 times per minute or at the frequency of 60 times per minute, thereby indicating respectively the states of occupation mentioned above.



   After having transmitted all the different digits, the recorder-translator 1300 is released, and the national trunk circuit 1100 is connected. The manner in which the various repeaters 301,521, etc., are controlled by the associated tone devices, 02, 522, etc., respectively, is set forth in ample detail in the aforementioned related patent application of Wicks et al. Grandstaff. However, it should be noted in passing that this control is based on the transmission of 1000-period current surges on the associated trunk line, for numbering purposes, and the transmission of short and long current surges of 2000 periods modulated to 60 periods, for supervision purposes.

   This arrangement allows the transmission of digits and supervision signals over the trunk line extending between two repeater circuits, notwithstanding the fact that the trunk line may include vacuum lamp repeater devices for voice frequency, not shown. As this type of apparatus is well known and is described in the aforementioned Wicks patent, its description will be omitted here for the sake of brevity.



   We will now consider in more detail and with reference to FIGS. 10 to 15 inclusive, the operations of the operator position circuit 1003 of the automatic trunk panel 1000, of the call switch 1082, of the national trunk circuit 1100, of the trunk selector 1200 and of the recorder-translator 1300, when of the routing of the call considered here from the operator position circuit 1003 of the automatic trunk panel 1000 of the AT trunk office to the called subscriber station T3 of the GF office. position operates first and then returns to idle the national trunk dial key K1002 in order to actuate the national trunk relay R1025 and the control relay R1020.

   By attracting, the relay R1025 closes by the pads 1027 a bonding circuit comprising the pads'-301'7, to-stick this relay and the control relay R1020 after the key K1002 has been put back to rest. On falling, the latter relay closes to the pads 1021 a circuit comprising the pads 1016 and 1012 to apply an earth potential to the control conductor C1032. In addition, the national long distance relay R1025 closes at the pads 1026 an excitation circuit of the coil of the control relay R1015, in order to attract the latter shortly after, this relay being of the combined type with delayed attraction and release.

   By attracting, this last relay cuts by the pads 1017 the bonding circuit of the national interurban relay R1025 and of the control relay R1020; and cuts through pads 1016 the earth potential application circuit to test lead C1032. When falling, the national long distance relay R1025 cuts at the pads 1026 the excitation circuit of the coil of the control relay R1015, to drop the latter shortly after, the latter being of the type

  <Desc / Clms Page number 19>

 biné with delayed attraction and release.

   Therefore, the ground potential is first applied to the test conductor C1032, and then removed from it, following the actuation and reset of the national trunk dial key K1012, to so that the ascent electro M1071 of the Strowger mechanism incorporated in the call switch 1082 is actuated and then released in order to drive the slider of the Strowger mechanism with a vertical step from its vertical position of rest. The M1072 rotation electro of this mechanism then intervenes, so that the call switch 1082 selects a free trunk in the group, including trunk 1160, going to the national trunk circuit 1100.

   In the event that the Strowger mechanism incorporated in call switch 1082 attacks trunk 1160, connection relay R1060 pulls in, thus closing a loop between sender 237 associated with attendant position circuit 1003 and them. line conductors C1162 and C1161 from junction 1160, and therefore via pads '1131 and 1137 to the upper and lower windings of line relay R1110 included in the national interurban circuit 1100, so that the latter. deny relay draws.



   By attracting, the line relay R1110 closes a circuit for attracting the R1120 bonding relay to the studs 1111. By attracting, the latter closes at the pads 1121 a circuit for the unapplication of earth potential to the test conductor C1163 of the junction 1160, in order to signify the occupation of the national trunk circuit 1100 to the other switches which have access to it.

   In addition, this relay closes to the pads 1123 a test circuit comprising the pads 1157, 1135 and 1143, between the friction pad 1152 of the searcher 1150 and the rotation electro M1156, so that the latter is actuated in the event that the friction pad Finder 1150 test 1152 relies on a sticking conductor going to a busy recorder-translator. More specifically, the ground potential appears on the sticking conductors going to busy recorders-translators; while the battery potential appears, on the bonding conductors going to the free recorders-translators. Therefore, the M1156 rotation electro is actuated like a buzzer, if necessary to select a bonding conductor going to a free recorder-translator.



  If the 1300 recorder-translator is the first free recorder-translator in the associated group, the M1156 rotation electro is actuated like a buzzer, to bring the 1151 rubbers, etc. searcher 1150, to select C1401 conductors etc., going to the recorder-translator
 EMI19.1
 1300. At this moment, a battery potential is, ca.f1.1: '.. 1.iqu.e J:;' J ... 1 .. The intermediary of the winding of the R1540 drive relay to the bonding conductor C1402, by closing a circuit substantially identical to that described above for the short-circuiting of the electro-rotation M1156, in order to prevent its subsequent operation.

   In addition, at this moment, a circuit is established comprising the pads 1134 and 1122, for the excitation of the coil of the connection relay R1140 in series with the rotation electro M1156 and the coil, connected in multiple, of the relay. attack R1540, so that the connection relay R1140 attracts.



  By attracting, the latter cuts at the pads 1143 the circuit indicated above for the ex-. quotation of its own winding and that of the R1540 drive relay; however, relay R1140 is bonded by the closed bonding circuit serving to energize its winding in series with the M1156 rotation electro. In addition, the latter relay closes a circuit to the pads 1142 for the application of direct earth potential to the test wiper 1152 of the researcher 1150, and therefore to the bonding conductor C1402, to attract the drive relay R1540.



  In addition, the connection relay R1140 establishes at terminals 1141, 1144, 1145 and 1146, communications with the wipers 1151, 1153, 1154 and 1155 of the researcher 1150, and therefore with the conductors C1401, C1403, C1404 and C1405 going to the recorder-translator 1300.



   By attracting, the attack relay R1540 cuts at the pads 1542 a circuit of application of earth potential to the release conductor C1346; and prepares at the pads 1541 a point in the chain circuit, including the chain conductor C1543, for the attraction of the full occupancy relay R1270. It can therefore be seen that, when all the 130G recorders-translators, etc., of the group are occupied, the chain circuit closes, causing the occupancy relay R1270 to be drawn.

   By attracting, the latter closes

  <Desc / Clms Page number 20>

 at pads 1271, etc ..., direct circuits for the unapplication of earth potential to test conductors C1163, etc ..., of the various junctions 1160 ;, etc ..., going to the various national trunk circuits 1100, etc. .. Thus, when all the recorders-translators 1300, etc ..., are busy, all the national trunk circuits 1100, etc ... ,, are artificially meant as being busy at the various switches having access to them.

   It goes without saying that when any one of the recorder-translators 1300, etc., of the group becomes free, the chain circuit is interrupted, so that the total occupancy relay R1270 drops out and eliminates the occupancy markings. - artificial connection of national interurban circuits 1100, etc ...



   We will now continue with the description of the operation of the national interurban circuit 1100. When the pulse conductors C1403 and C1404 are connected by the attraction of the connection relay R1140, a loop is established comprising the pads 1531, 1551 1251 and 1257, to attract the line relay R1210 of the interurban selector 1200. By attracting, this last relay closes to the pads 1211 a circuit comprising the pads 1255, to attract the sticking relay R1220. By attracting the latter closes a multiple circuit to the pads 1221 to apply the earth potential to the test conductor C1163 of the junction 1160.

   At this time, the first digit stored in recorder 238 is sent by sender 237 through call switch 1082 and line conductors C1162 and C1161, to line relay R1110 of the national trunk circuit 1100, so that this last relay follows the impulses of this first digit. Each time the line relay R1110 drops and then attracts, it cuts and then closes, by its pads 1111, the bonding circuit of the bonding relay R1120, which is thus stuck during the Pulses, since it is delayed release.

   In addition, each time the line relay R1110 drops and then attracts, it closes and then cuts by its pads 1113 a circuit comprising the pads 1141 and the friction 1151 of the searcher 1150, then apply a ground potential to the conductor of pulses C1401, thus establishing and breaking a circuit, comprising the wiper RS1, of the sequential recording switch RS and the first engaged pins of the associated bank, as well as the first conductor of the cable 1342, for the energization of the winding of the series relay R1310, in series with the control electro A12 of the network recorder A1.

   Therefore, the series relay R1310 attracts and is stuck during the pulses, being delayed release, while the control electro A12 of the network recorder Al attracts and falls intermittently. More specifically, the first digit 6 of the network code is repeated from the line relay R1110 to the control unit A12 and is recorded accordingly in the first network recorder A1.



   More specifically, the wiper A11 of the network recorder A1 releases the idle pin and drives the sixth pin of the associated bank, thereby disconnecting the first conductor of the 1341 cable from the step-acting conductor C1341, and by connecting the first conductor of cable 1341 to the sixth conductor of marking cable 1344, all for a purpose which will be more fully explained below. In addition, when the slider All of the first network recorder A1 is commanded to release the rest pin of the associated bench .. the set of switching springs A15 is actuated so as to prepare the release electro A13 for the purpose of its subsequent actuation, via the release conductor C1346.



   By attracting, the R1310 series relay closes at its 1311 pads a control circuit of the R1320 step-action relay. At the end of the first digit 6 of the network code, the line relay R1110 is stuck, causing the release of the series relay R1310 shortly after, the latter being delayed release. On falling, the latter relay closes to the pads 1312 a circuit comprising the pads 1321, to energize 1 1 control electro RS3 of the sequential recording switch RS. In addition to falling, this same relay cuts at the pads 1311 the bonding circuit of the step-action relay R1320, so that the latter drops out shortly after, being with delayed release.

   When it drops out, this last relay cuts off at pads 1321 the excitation circuit of the RS3 control electro, so that this electro returns to

  <Desc / Clms Page number 21>

 rest. Thus, the latter attracts and then falls, moving the trotters RS1 and RS2 away from the sequential recording switch RS by a step counterclockwise. At this moment, the RS1 wiper of the RS switch moves away from the first pin and engages on the second pin of the associated bank, so that the rotation electro A22 of the network recorder A2 is selected via the second conductor included in the 1342 cable.



   Thus, it can be seen that the first digit 6 of the network code has been recorded in the first network recorder A1 while the recording sequential switch RS occupied its first position; further sees that at the end of this recording, the network sequential switch RS was set to its second position.

   Likewise, the line relay R1110 repeats the second digit 1 and the third digit 4 of the network code to the respective network recorders A2 and A3, and, of course, the three digits of the office code and the four line number digits are recorded respectively in the three desktop recorders 01 to 03 inclusive, and in the respective digital recorders Nl to N4 inclusive Thus, the digits of the national number 614-475-1234 are recorded in the respective network recorders A1 , A2 and A3, the respective office recorders 01, 02 and 03, and the respective digital recorders N1, N2, N3.

   At this moment, the sender control circuit 236 and the position circuit 1003 of the automatic trunk board 1000 are released, assuming that the attendant has operated the red button on the keypad 2350.
Following the recording of the first digit 6 of the network code in the first network recorder A1, the control unit A12 controls the contacts A14, so that the number 6 is repeated on the unit. AC3 rise of the AC composite network switch. Likewise, following the recording of the third digit 4 of the network code in the third network recorder A3, the control unit A32 checks the contacts A34, so that the digit 4 is repeated. to the electro of rotation.

   AG4 of the AC network composite switch. In addition, while the second digit 1 of the network code is stored in the second network recorder A2, the wiper A24 is actuated to select the first pin in the associated bank going to the first wiper AC1 of the commu. - composite AC network generator.

   Thus, when the network code digits 6, 1 and 4 are registered, the AC composite network switch is set to its sixth vertical position and its fourth rotary position, and an earth potential is applied to the first contactor AC1. of this switch, such that a ground potential is applied through the jumper field 1301 between the pin bank of the AC network composite switch and the pin bank of the AR network routing switch in a goal which will be explained more fully below.



   When the first digit 4 of the desktop identifier is stored in the first desktop recorder 01, the switching spring set 016 is actuated, applying a ground potential to the pulse cam 1088 actuated by the associated motor, not shown, so that earth pulses are transmitted by the pads 1087 and 1083 to the ascension elsctro AR9 of the network routing switch AR. Therefore, the strowger mechanism wiper carriage incorporated in this switch is stepped vertically under the control of the ascent slider AR1 and the associated R1080 ascent test relay.

   When this carriage is advanced by a number of vertical steps corresponding to the pin marked in the associated bank, an excitation circuit is established for the right winding of the rise test relay R1080, which attracts , and cuts at the pads 1083 the above-mentioned circuit for the excitation of the vertical electro AR9.

   and closes to the pads 1082 a substantially identical circuit for the transmission of pulses to the rotational electro AR10o For example, in the present case, the fourth pin of the sixth level from below the pin bank of the network switch composite AC is connected by a jumper to the second pin of the first level from the bottom of the AR network turnout switch bench, so that the ascent control slider AR1 meets this potential of

  <Desc / Clms Page number 22>

 earth, via the associated resistor, following the first vertical step of the network point switch contactor carriage
AR.

   The aforementioned circuit is established as follows: the second pin of the first level from below, earthed, of the bank of the network routing switch AR network, the associated resistance, the control slider of ascension AR1, and the first pin engaged in the ascension control pin bank, the right winding of the ascension test relay R1080, the ascension electro AR9, battery potential.

   This circuit is established when the first pulse coming from the pulse cam 1088 fades. By attracting, the rise test relay R1080 establishes at the pads 1081 a sticking circuit via the conductor of bonding to earth C1402, for excitation of the left winding of this relay
Therefore, at this time, earth pulses from pulse cam 1088 are transmitted to the rotation electro AR10, so that the sliding carriage of the Strowger mechanism incorporated in the turnout switch. mains is removed step by step in the rotary direction under the control of the rotation control slider AR2 and the rotation test relay R1085. In this example,

   when the sliding mechanism of the mechanism
Strowger has been moved two rotary steps from its rest position, the second spindle of the first level from below of the associated bank is engaged, so that the earth potential applied through the control friction rotation AR2 is sent to energize the right winding of the rotation test relay R1085 in series with the rotation electro AR10.



   This circuit is established when a second pulse transmitted from the pulse cam 1088 to the rotation electro AR10 subsides. When the R1085 rotation test relay is thus energized, it attracts, to close at the pads
1086 a bonding circuit for the excitation of its left winding via the C1402 bonding conductor which is earthed.

   In addition, the R1085 rotation test relay cuts at the 1087 pads the circuit for the transmission of pulses to the AR10 rotation electro.It should be noted in passing that the R1085 rotation test relay is of the marginal type, in order to '' prevent its incorrect operation between the rotary steps of the Strowger mechanism incorporated in the AR network switcher, while waiting for the second pin of the first level from below, directly earthed, to be engaged by the control slider associated rotation AR2. This is ensured using the two resistors connected in series and interposed in the excitation circuit of the right winding of the rotation test relay R1085 prior to the aforementioned engagement of the marked pin, by the wiper. of rotation test AR2.

   Thus, at this time, the R1080 ascent test relay and the R1085 rotation test relay checked the operation of the sliding carriage of the Strowger mechanism incorporated in the network switch AR, so as to place this carriage in second position of the first level from below, position connected by a jumper, via the jumper system 1301, to the fourth position of the sixth level from below of the wiper carriage of the Strowger mechanism incorporated in the control switch. AC composite network. Therefore, this latter switch is moved according to the three digits of network code 614 and, in turn, causes the movement of the network switch AR to establish routing to the network according to that code.



   More specifically, at this time, the network dispatcher AR determines whether the code 614 relates to a called network near or far from the requesting trunk office AT. This determination depends on the bare wire links established in the spindle bank of the Strowger mechanism associated with the rotation slider AR3 going to the network identification relay R1330. In the present example, the requested network identified 614 is close to the requesting office AT, so that the earth potential is applied, by means of a jumper, to the pin engaged by the rotary wiper AR3, c ' that is, the second pin of the first level from below of the associated bank, which establishes a circuit for the energization of the coil of the network relay R1330.

   Shortly thereafter, the latter attracts, being delayed attraction, in order to prevent its improper operation between the rotating steps of the wiper carriage of the Strowger mechanism incorporated in the network switch AR.

  <Desc / Clms Page number 23>

 



   Thus, the operation of the network relay R1330 indicates that the requested network 614 is close to the requesting office AT. By attracting, this relay closes to the pads 1334 a bonding circuit for the excitation of its own winding, by the bonding conductor C1402 earthed.

   In addition, the network relay cuts at pads 1336, etc ..., the connections between the five wipers AR4 to AR8 included, of the Strowger mechanism incorporated in the AR network switcher on the one hand and the respective first five pins of the bench associated with wiper SS3 of the sequential transmission switch SS; and establishes at pads 1335, etc ..., analogous connections between the five wipers OR4 to OR8 included, of the Strowger mechanism incorporated in the OR desktop switcher on the one hand, and the first five respective pins of the bench associated with the wiper SS3 of the SS send sequential switch.

   In addition, the network relay R1330 prepares at the 1331 pads a circuit indicated below, for the excitation of the office relay R1430, and earths the 6th, 7th and 5th pins of the bank associated with the SS1 wiper, of the switch sequential SS transmission, for a purpose which will be fully explained below.



   Following the recording of the first office code number 4 in the first office (code) recorders 01, the control unit 012 actuates the contacts 014, so that the number 4 is repeated. to the OC9 ascension electro of the OC composite desktop switch.



  Likewise, following the recording of the third digit 5 of the office code in the third office recorder 03, the control electro 032 actuates the contacts 034, so that this digit is repeated on the electro OC10 Rotation of the OC Composite Desktop Switch. In addition, when the second digit 7 of the office code is registered in the second office recorder 02, the slider 042 is operated to select the 7th pin of the associated bank, connected to the 6th slider OC6 of the OC desktop composite switch.

   Thus, when the digits 4, 7 and 5 of the office code are registered, the office composite switch OC is placed in the fifth position of its fourth level from below, and the ground potential is applied to its sixth contactor OC6, so that a ground potential is applied through the jumper system 1401 between the pin bank of the OC composite office switch and the pin bank of the OR office switch, for a purpose which will be fully exposed later.



   When the first digit 1 of the row number is recorded in the first digital recorder N1, the switch spring set N14 is actuated, applying a ground potential to the pulse cam 1188 actuated by the associated motor, not shown. , so that earth pulses are transmitted by the pads 1187 and 1183 to the ascension electro OR9 of the OR office switcher.

   Therefore, the stringer mechanism slider carriage incorporated in the OR desktop switcher is stepped vertically under the control of the OR1 ascent slider and the associated ascent test relay R1180. When the wiper carriage of this Strowger mechanism is driven a number of steps in the vertical direction, in accordance with the pin marked in the associated bank, a drive circuit of the right winding of the relay is established. of ascension test R1180, which attracts, and cuts, at the pads 1183 the circuit indicated above for the excitation of the electro of ascension OR9, and establishes at the pads 1182 a substantially identical circuit for transmit pulses to the OR10 rotation electro.

   For example, in this case, the fifth pin of the fourth level from below of the OC composite office switch bench may be jumpered to the second pin of the first level from below the bench of the OR office switcher, so that the control wiper OR1 meets this earth potential, through the associated resistance, on the first vertical step of the wiper carriage of the OR office switcher. The aforementioned circuit is established: the second pin of the first level from below, grounding of the bench of the OR office switchman, the associated resistance, the ascent control slider OR1, the first pin engaged in the associated ascension control bench, the right winding of the ascension test relay R1180, the ascension electro OR9, battery potential.



  This circuit is established when the first pulse from the pulse cam

  <Desc / Clms Page number 24>

 sions 1188 goes out. By pulling, the rise test relay R1180 establishes a bonding circuit to pads 1181 via the grounded bonding conductor C1402, for energizing the left winding thereof.



   So, at this moment, earth pulses coming from the pulse cam 1188 are transmitted to the rotation electro OR10, so that the wiper carriage of the Strowger mechanism incorporated in the office switch OR is stepped in rotation under the control of the rotation control slider OR2 and the rotation test relay R1185. In the present example, when the sliding carriage of the Strowger mechanism has been rotated two steps from its normal rotary position, the second spindle of the first level from below, of the associated bench, is engaged. , so that an earth potential is applied through the rotation control wiper OR2, to energize the right winding of the rotation test relay R1185 in series with the rotation electro OR10.

   This circuit is established when the second pulse transmitted from the pulse cam 1188 to the rotation electro OR10 goes out. When energized, the rotation test relay R1185 attracts, and closes at the pads 1186 a bonding circuit for the excitation of its own left winding via the bonding conductor C1402 which is grounded. , this relay cuts to pads 1187 the pulse transmission circuit to the OR10 rotation electro.

   It should be noted in passing that the R1185 rotation test relay is of the marginal type, in order to prevent its incorrect operation between the steps of the Strowger mechanism incorporated in the OR desktop switcher, and while waiting for the second The first level spindle from below, directly earthed, or engaged by the associated rotation control slider OR2. This is done by the two resistors connected in series, included in the excitation circuit of the right winding of the rotation test relay Rl185, prior to the engagement of the aforementioned marked pin by the rotation test wiper. tion OR2.

   Thus, at this time, the R1180 ascent test relay and the R1185 rotation test relay checked the operation of the scrubber carriage of the Strowger mechanism incorporated in the OR desktop switcher, in the same way. Bringing into the second position of the first level from below, connected by the garter system 1401 to the fifth position of the fourth level from below of the scrub carriage of the Strowger mechanism incorporated in the office composite switch OC. Therefore, this latter switch is moved according to the three digits of the office code 475 and in turn causes the OR office switch to move to establish the route to the requested office according to that code.



   More specifically, at this time, the OR office routing switch determines whether or not the registered office call sign should be sent by the recorder-translator 1300, which is done under the control of the relay. office R1430.



   More specifically, in the present example, the registered office code 475 is to be sent by the recorder-translator, so that the office relay R1430 does not attract. This determination is based on whether the OR3 rotation slider meets, in. the associated bench, a pin connected to the battery potential, in which case an excitation circuit is established for the coil of the office relay R1430, which attracts shortly after, being with delayed attraction, in order to prevent its operation incorrect between the steps of the sliding trolley of the Strowger mechanism incorporated in the OR desktop switcher.

   In the event that it attracts, the office relay R1430 establishes at the pads 1432 a bonding circuit for the excitation of its own winding, by the bonding conductor grounded C1402; and establishes at the pads 1431 a circuit for applying a ground potential to the 9th, 10th, and 11th pins of the bank associated with the slider SS1 of the transmission sequential switch SS, for a purpose which will be more fully explained later.

   However, as noted above, in this example, the office relay R1430 is not drawn when the registered office code 475 is to be sent by the recorder-translator 1300. Additionally, the activated office switch OR sets any desired office referral digits, no office referral digits are required herein.

  <Desc / Clms Page number 25>

 example. Since no office switch digit is needed in this example, the pins engaged by the five wipers OR4 to OR8 included are wired through the jumper system associated 1402 to the erase conductor C1345 in a goal which will be explained more fully below.



   In the present example, an earth potential is applied from the sequential resign switch SS via the wiper SS3 and the first engaged pin of the associated bank, and the pads 1335, to the wiper OR4 of the office switcher. OR, and from there to the 01345 erase conductor, to attract the R1325 erase relay. By attracting, the latter closes at the pads 1326 a circuit for applying earth potential to the stop conductor C1327, to attract the emission stop relay R1560. By attracting, the latter closes at the pads 1561 an additional shunt between the pulse conductors C1403 and C1404 going to the line relay R1210 of the interurban selector 1200,

   thus positively preventing the sending at this moment of a digit from the recorder-translator 1300, via the pulse conductor C1403 and C1404. In addition, the emission stop relay R1560 cuts at the pads 1565 a point in a circuit indicated below, for the actuation of the rotation electro DS3 of the digit sending switch DS. Furthermore, the application of the earth potential to the erase conductor C1345 has the effect of establishing a circuit comprising the pads SS5, to attract the rotation electro SS4 of the emission sequential switch SS. The SS4 rotation electro attracts, in order to interrupt its own excitation circuit at the SS5 pads, so that the SS4 rotation electro falls back.

   When the latter attracts and falls thus, the wipers SS1 to SS3 inclusive of the transmission sequential switch SS are driven one step clockwise to engage the second pins of the associated banks. When the wiper SS3 releases the first pin of the associated bench, it cuts the aforementioned circuit comprising the wiper OR4 of the office switcher OR3, for the application of an earth potential to the erasing conductor C1345; and, when the wiper SS3 engages the second pin of the associated bank, an earth potential is applied by the pads of the network relay attracted R1330 to the wiper OR5 of the office switcher OR.

   However, as the 1402 jar system connects the OR5 wiper to the C1345 erase conductor, the earth potential will, in this example, be applied again to the C1345 erase conductor, to bond the erase relay. R1325 and to perform another attraction and release of the rotation electro SS4 of the emission sequential switch SS.

   In the present example and given that the OR4 to ORS wipers included are connected by the jumper system 1402 to the erasing conductor C1345, the SS4 rotation electro works like a buzzer, to automatically drive the aforementioned wipers clockwise five step SS transmit sequential switch and engage them on the sixth pins of the associated banks.

   At this moment, the SS1 slider engages the sixth pin of the associated bank, included in the earth multiplication due to the network relay R1330 attracted, establishing a substantially identical circuit to again attract the rotation electro SS4. . More specifically, and since the network relay R1330 occupies its attracted position, the SS4 rotation electro is automatically attracted by three more steps, so that the aforementioned wipers of the SS emission sequential switch engage the ninth. pin of the associated bench.

   At this time, the wiper SS3 engages the ninth pin of the associated bench, thus applying a ground potential to the wiper 011 of the first desktop recorder 01; and, the slider SS1 which engages the ninth pin of the associated bench performs the test, to determine whether the office relay R1430 is in its attracted or idle position. In the event that this relay occupies the pulled position, the SS4 rotation electro automatically pulls three additional steps in order to drive the aforementioned trotors of the SS transmission sequential switch, to make them engage the twelfth pins of the associated bench. However, in the present example, this relay does not occupy its attracted position, so that these rubbers of the transmission sequential switch SS stop on the 9th pins of the associated bank.

   When the SSI slider releases the eighth pin of the associated bank, the multiple circuit for the application of a ground potential to the erase conductor C1345 is cut, so that the erase relay

  <Desc / Clms Page number 26>

 R1325 falls shortly after, being delayed release.

   When it drops, this relay cuts the direct circuit at pins 1326 for the application of earth potential to the stop conductor C1327. At this time, and since the first digit 4 of office code 475 has already been recorded in the first office recorder 01, there is no earth link between the grounded wiper 011 of the first recorder. office 01 and stop conductor C1327, so that the above-mentioned circuit for bonding the emission stop relay R1560 is cut, which has the effect of releasing this last relay shortly after, this relay being with delayed release When falling,

   the emission stop relay R1560 cuts off at pins 1561 the additional multiplication between pulse conductors C1403 and C1404 and prepares at pins 1565 the above-mentioned circuit for actuating the DS3 rotation electro of the DS pulse sending switch.



   Following the recording of the second digit 2 of line number 1234 in the second digital recorder N2, the recording sequential switch RS is moved to its ninth position, so that the slider RS1 of the sequential switch of record RS selects the control electro N32 of the third digital recorder N3 in order to record the third digit 3 of line number 1234 in it.

   At this time, the RS2 slider of the RS recording sequential switch engages the ninth pin of the associated bank included in the grounded multiplication, so that a ground potential is applied to the pulse cam 1566, which is thus caused to transmit a first earth pulse via the pads 1535 and 1565 to the control electro DS3 of the digit-sending switch DS, so that the electro DS3 attracts and then falls. When the DS3 control solenoid pulls in and then falls back, the DS1 and DS2 trotters of the DS digit-sending switch are moved away step by step clockwise from their rotating rest positions.

   When the DS1 slider of the DS digit sending switch engages the first pin of the associated bank, included in the earthed multiplication, a circuit is established for the attraction of the shunt relay R1550. By attracting, the latter closes a multiple circuit to the studs 1552 for the application of the earth potentials to the bonding conductor C1402, and closes to the studs 1553 a circuit comprising the studs 1562, to actuate the SS4 rotation electro. of the SS send sequential switch. By attracting, this electro conditions the wipers SS1 to SS3 inclusive, of the transmission sequential switch SS, so that they are separated by a new step clockwise from their ninth positions.

   Finally, the shunt relay R1550 cuts at pins 1551 a normally closed shunt between the pulse conductors C1404 and C1403 going to the coils of the line relay R1210 of the trunk selector 1200. The pulse cam 1566 then transmits a series of 'Ground pulses to the DS3 rotation electro of the DS digit transmitter switch, so that this electro attracts and falls repeatedly., Whenever this electro attracts and then falls back, the DS1 and DS2 trotters are driven one more step clockwise.

   In addition, each time the DS3 rotation electro attracts and then falls, it cuts and then restores, at the DS5 contacts, the pulse circuit extending between the pulse conductors C1403 and C1404, from so that the pulses are transmitted to the line relay R1210 of the trunk selector 1200.



   In the present example, after the DS3 rotation electro has drawn and then released, in order to transmit four pulses through the DS5 contacts, on the pulse conductors C1403 and C1404, the DS2 wiper of the digit switch DS engages the fifth pin of the associated bench, which terminates the fourth conductor of the 1344 marking cable, and which in turn ends at the fifth pin of the bench associated with the grounded wiper 011 of the first desktop recorder 01, so that an AC circuit is established to attract the emission stop relay R1560. By attracting, this relay closes the alternating shunt between the C1403 and C1404 pulse conductors at pads 1561,

     in order to make the subsequent operation of the DS3 rotary solenoid ineffective with regard to the transmission of pulses on the pulse leads C1403 and C1404. So in the pre-

  <Desc / Clms Page number 27>

 For example, the DS3 rotation electro operates to transmit to the DS5 contacts a series of four pulses comprising the first digit 4 of the office code 475 recorded in the first office recorder 01, at which time the stop relay emission stop R1560 is actuated as described above. In addition, by attracting, the emission stop relay R1560 cuts, at pins 1562, the aforementioned circuit for actuating the rotation elec- tro SS4 of the SS send sequential switch,

   to bring this electro to fall and to drive the wipers SS1 to SS3 inclusive, from the emission sequential switch SS to their respective tenth positions for a purpose which will be fully explained later. In addition, the emission stop relay R1560 closes at the pads 1563 a bonding circuit, comprising the pads 1553, for the excitation of its own winding; cuts to pads 1565 the initial pulse circuit for the DS3 rotation electro; and closes at the pads 1564 an AC circuit for actuating the DS3 rotary solenoid valve. The last mentioned circuit extends from the DS1 wiper and the spindle engaged in the associated bank, included in the earth multiplication, through the contacts DS4 and 1564, to the rotation electro DS3, and from there to the battery potential.

   Therefore, the DS3 rotation electro works like a buzzer, due to the inclusion of the DS4 contacts in its excitation circuit, by returning the DS1 and DS2 wipers step by step in the direction of the clockwise, to their rest positions. When the DS1 slider releases the last pin of the associated bench included in the earth multiplication and that it is returned to the rest position, to engage the rest pin in the associated bench, the control circuit of the electro DS3 rotation speed is cut, and the multiplied circuit for bonding the R1550 shunt relay is cut. At this time, the digit send switch DS was returned to its home position following the transmission of the first digit from the recorder-translator 1300, while the shunt relay R1150 drops out shortly thereafter. , being delayed release.

   On falling, this relay closes at the pads 1551 the multiplication between the pulse conductors C1403 and C1404; cuts the multiple circuit to the C1552 pads for the application of earth potential to the C1402 bonding conductor; and cuts to pads 1553 the bonding circuit of the emission stop relay R1560. Shortly afterwards, the latter falls again, being with delayed release, by cutting at pads 1562 the additional shunt between the pulse conductors C1403 and C1404. In addition, the emission stop relay R1560 prepares at the pins 1565 the pulse circuit for the DS3 rotary solenoid.



   The line relay R1210 of the selector 1200 follows the first number 4. Each time this relay drops and then attracts again, it cuts and then restores to the pads 1211 the bonding circuit of the relay R1220, so that the latter is stuck for the pulses, being with delayed release. In addition, each time that this relay drops out and then attracts again, it closes and then cuts at the pads 1213 a circuit comprising the pads 1255 and 1222, to energize the coil of the R1230 series relay, in series with the electro M1225, so that this relay attracts and is stuck during the pulses, being delayed release, and the ascension electro M1225 is repeatedly attracted, to drive the sliding trolley step by step. not in the vertical direction.

   At the end of the first digit 4 transmitted from the recorder-translator 1300, the line relay R1210 is stuck, by sticking the bonding relay R1220 and causing the release of the series relay R1230 shortly after, this last relay being at delayed release. When-. As the wiper carriage of the Strowger mechanism incorporated in the interurban selector 1200 is moved vertically away from its rest position, the sets of switching springs S1233 and S1261 are actuated.

   Following its actuation, the set of switching springs S1261 closes a circuit comprising the pads 1227, 1231 and 1221, for the attraction of the stepped-action relay R1240. By attracting, this relay establishes at the pads 1241 a bonding circuit comprising the set of switching springs S1261 and the pads 1227, for the energization of its own winding. When the R1230 series relay drops out as indicated above, it cuts off at pins 1231 the initial circuit for energizing the coil of the R1240 step-action relay; however, the multiple bonding circuit for the excitation of this last relay

  <Desc / Clms Page number 28>

 is established at this time.

   In addition, on falling, the series relay R1230 establishes at the pads 1232 a circuit comprising the pads 1221 and 1242 for the actuation of the electro of rotation M1226, so that the wiper trolley is moved one step apart. the rotational direction in relation to its rotational resting position. In addition, by attracting, the M1226 rotation electro cuts the bonding circuit for the R1240 stepped-action relay at pads 1227. On falling, the latter cuts at studs 1242, the excitation circuit of the electro-rotation M1226; on falling, the latter closes to the pads 1227 a test circuit comprising the set of switching springs S1261 and the pads 1253, going to the test wiper of the wiper carriage.



   At this moment, the first junction of the previously chosen group is subjected to a test by the step-action relay R1240, an earth potential appearing on the test conductor of the aforementioned first junction in the case where this one is occupied. , while a battery potential appears on this conductor when this junction is occupied.

   Assume first that the junction is occupied at this time; In this case, the earth potential appearing on the said conductor closes the above-mentioned circuit for the re-attraction of the step-action relay R1240, so that the latter causes a new attraction of the M1226 rotation electro so that to set the drive of the wiper trolley with a new rotary pitch, with selection of the next junction in the group previously selected.

   This action continues until a free junction which is part of the previously selected group is selected by the wiper trolley, after which the presence of a battery potential on the test or control wiper. blows a substantially identical circuit, to short-circuit the winding of an R1240 step-action relay; furthermore, at this moment, a circuit comprising the pads 1221, the pads 1253 and the test wiper of the set of wipers is established in order to energize the winding of the connection relay R1250, which attracts.

   By attracting, this last relay cuts at pads 1253 the original control circuit for itself; and closes a circuit to the pads 1254 for applying a direct earth potential through the pads 1221 and the test wiper of the set of wipers, to the test conductor of the selected junction. At this moment, a series bonding circuit comprising the pads 1221, a set of switching springs S1261 and the pads 1227, is established to energize the windings of the connection relay R1250 and of the step-action relay R1240, so that the relay R1250 is stuck; however, the R1240 relay does not attract, being of the marginal type.

   In addition, the connection relay R1250 closes to the pads 1252 and 1256 a direct link comprising the pads 1145 and 1144 between the line rubbers of the set of rubbers and the pulse conductors C1403 and C1404; so that the next digit transmitted from the logger-translator 1300 is transmitted directly over the metal circuit at the junction which was driven by the wiper carriage of the Strowger mechanism incorporated in the interurban selector 1200. In addition, the relay of connection R1250 cuts to pads 1251 and 1257 the circuit indicated above for bonding the line relay R1210; and cuts to the pads 1255 the aforementioned circuit for the bonding of the bonding relay R1220, which drops out shortly after, being with delayed release.

   Finally, the connection relay R1250 closes by its pads 1258 a connection between the special test conductor C1164 of the junction 1160 and the special test wiper of the wiper set, for a purpose which will be explained more fully below. At this time, the trunk selector 1200 operated first to select a trunk group, and then a free trunk therein, and established the connection, so that the next digit transmitted from the trunk group. recorder-translator 1300 is sent directly to long distance selector 1200 at the selected junction.



   At this time the send sequential switch SS occupies its tenth position, so that the slider SS3 selects the conductor which is part of the cable 1341 and going to the slider 021 of the second desktop recorder 02, thus conditioning the recorder-translator 1300 in view of the transmission of the second digit of the office code recorded in the second office recorder 02.

   At this moment, the pulse cam 1566 causes a new attraction of the electro-rotation DS3 of the sending switch.

  <Desc / Clms Page number 29>

 DS digits, so that the shunt relay R1550 draws again, and the subsequent operation of the DS3 rotary electro causes the transmission, through the DS5 pads, of the pulses of the second office digit 7, to the pulse conductors C1403 and C1404, and therefore on the line conductors of the selected junction.

   More specifically, the DS3 spinning electro attracts to transmit seven pulses in a series, constituting the second office digit 7, so that the DS2 wiper of the DS number transmission relay meets the marked conductor in the cable. marking 1344, thereby causing a new attraction of the transmit stop relay R1560, and the resulting shutdown and restart of the recorder-translator 1300, so that the transmit sequential switch SS is brought to its eleventh position, thus applying the earth marking from the SS3 slider to the 03 slider of the third C3 desktop recorder.



   Considering the above explanation of the operating mode of the logger-translator 1300, in order to transmit the first office digit 4 recorded in the first office register 01, as well as the second office digit 7 recorded in the second office recorder 02, it will be understood that the operation is substantially identical with respect to the transmission of the third office digit 5 recorded in the third office recorder 03, and line number digits 1, 2 , 3 and 4 respectively, recorded in the digital recorders N1, N2, N3 and N4.



   After transmission of the last digit of the line number, the transmission sequential switch SS is set to its 16th position, completing a circuit comprising-pads 1532, to apply a ground potential to the C1401 pulse conductor, and therefore a circuit comprising the scrubber 1151 of the finder 1150 and the pads 1141 and 1112 to attract the connection relay R1130 of the national interurban circuit 1100.

   By attracting, this last relay closes to the pads 1133 a bonding circuit comprising the earth control conductor C1163, for the excitation of its own winding; it also closes to the pads 1132 and 1136 a direct metal link between the line conductors C1162 and C1161 of junction 1160, on the one hand, and the line conductors of the junction selected by the interurban selector 1200, on the other hand ;

   and cuts at pads 1131 and 1137 the above-mentioned loop circuit for bonding the line relay R1110. The connection relay R1130 also cuts at the pads 1134 the bonding circuit indicated above for the connection relay R1140; and closes at the pads 1138 a connection between the special test lead C1164 of the junction 1160 and the set of switching springs S1235 used for a purpose which will be more fully explained hereinafter.



  On falling, the line relay R1110 cuts pins 1111 the sticking circuit of the sticking relay R1120, which drops out shortly after being with delayed release. When it drops out, this last relay cuts the multiple circuit at terminals 1121 for the application of earth potential to the control conductor C1163: however, without effect at this time, since the earth potential is retained on the control conductor C1163 by the inside junction activated and comprising the answer switch 1081 and the call switch 1082 connected to the attendant circuit 1003. So at this time the connection was established between the position circuit of operator 1003 of the automatic trunk panel 1000 and the called subscriber set T3 of the GF office.



   When it drops out, the connection relay R1140 of the national interurban circuit 1100 cuts the circuit at pins 1142 for the application of the pot; - earth tiel to the holding or bonding conductor C1402, in order to ensure the release of the relay. 'R1542 attack of the recorder-translator 1300.



  On falling, this last relay cuts a point at the pins 1541 in the chain circuit for the attraction of the total occupancy relay R1270; 'and closes at pads 1542 a circuit for the application of earth potential to the release conductor C1346. The application of earth potential to this last conductor closes a circuit comprising the set of switching springs AR12, for the excitation of the release electro AR11 of the network switcher AR, so that the sliding contact carriage of this switchman is released and trains-

  <Desc / Clms Page number 30>

 born to its starting positions, rotating and vertical.

   When the network switcher AR is thus released, the set of switching springs AR12 is actuated and cuts off the excitation circuit of the release electro ARllo Similarly, the recording sequential switch RS, the AC network composite switch, 1-OR desktop switch, the OC desktop composite switch, network recorders A1, A2 and A3, desktop recorders 01, 02 and 03 and digital recorders Nl, N2 , N3 and N4, are released.

   In addition, the application of earth potential to the release conductor C1346 closes a release circuit comprising the set of switching springs RS6, the switch SS2 and the engaged pin of the associated bank ,, - as well as the contacts SS5, for excitation of the rotation electro SS4. of the sequential emission switch SS, so that the latter electro-operates like a buzzer, to return the aforementioned rubbers. of the sequential emission switch SS in their initial or rest position. At this moment, the slider SS2 moves away from the last spindle of the associated bank included in the multiplication connected to the release conductor C1346, so that all subsequent operation of the rotation electro SS4 is stopped.

   In addition, when the earth potential is removed from the holding conductor C1402, the above-mentioned bonding circuits for the network relay R1330, the rise test relay R1080, the rotation test relay R1085 , the ascent test relay R1180 and the rotation test relay R1185 are switched off, so that these relays drop out. At this moment, the recorder-translator 1300 is completely released, and the battery potential is applied by the winding of the drive relay R1540 to the bonding conductor C1402, to again signify the state of non-occupation of the en. - registrar-translator 1300 to researchers 1150, etc ..., of the various national interurban circuits 1100, etc ..., who have access to it.



  * We will now come back to the operation of the recorder-translator 1300: In the event that the interurban selector 1200 encounters a state of total occupation of the junctions on the first choice or normal channel, following the first digit office code 4, the sliding trolley of this selector is moved eleven rotating steps from its rotational rest position, with actuation of the sets of switching springs S1234 and S1235. In operation, the set of springs S1234 closes a circuit comprising the pads 1146 and the wiper 1155, as well as the engaged pin of the associated bank, to apply an earth potential to the occupant conductor C1405, thus closing a circuit, comprising the pins. pads 1511, for energizing the lower winding of occupancy relay R1530, which attracts.

   By attracting, the occupancy relay R1530 closes at the pads 1533 a bonding circuit comprising the set of switching springs SS6 associated with the emission sequential switch SS, for the excitation of the upper coil of this relay. In addition, this same relay cuts at pins 1531 the loop circuit going to the line relay R1210 of the trunk selector 1200, which relay drops out and drops the wiring relay R1220 shortly thereafter, the latter being delayed release.



  On falling, this last relay closes to the pads 1223 a circuit comprising the pads 1255 and 1213 and the set of switching springs S1233, for the activation of the release electro M1228, so that the friction slide of the mechanism The trunk switch 1200 strowger is released and returns to its rotational and vertical rest positions. When this selector is released in this way, the switching spring sets S1261, S1233, S1234 and S1235 are actuated. More specifically, set S1233 is operated to cut the attraction circuit of the M1228 release electro, while set S1234 is operated to cut the lower coil energizing circuit of the occupancy relay R1530.



     @ By attracting, the occupancy relay R1530 cuts to the pins 1532 a point in the circuit for the application of earth potential to the pulse conductor C1401, to prevent the operation of the connection relay R1130 in the national trunk circuit 1100 to following the release of the serial transmission relay SS of the recorder-translator 1300.

   Then, the occupancy relay R1530 closes at the pads 1534 a circuit comprising the pads 1333 for the actuation of the electro-rotation OR10 of the office switch OR, so that the aforementioned wipers of the latter

  <Desc / Clms Page number 31>

 switch are moved apart a new step in the rotary direction, to engage on the third pads of the first floor below the associated bench, in order to select a second choice channel between the AT long distance office and the GF office, as explained more fully below.



   In addition, the occupancy relay R1530 cuts off at pins 1535 the excitation circuit of the rotation electro DS3 of the digit sending switch DS, to prevent the recorder-translator 1300 from transmitting again. at the moment; and closes to the pads 1536 a circuit comprising the pads 1523, for the energization of the lower winding of the counter relay R1520, which draws its first step and, to the pads, 1521 closes a substantially identical circuit, comprising the conductor of bonding C1402 earthed, to short-circuit its own upper coil, this relay being stepped-action. Finally, the occupancy relay R1530 closes at pins 1537 a circuit for applying earth potential to the conductor of C1345 erase, to operate, like a buzzer,

   the SS4 rotation electro of the SS sequential sender switch.



   So, at this time, this last switch is actuated like a buzzer and returned to its rest position, so that the SS6 switching spring set is actuated so as to cut the bonding circuit for the energization of the upper winding of the occupancy relay R1530. The latter falls back and closes at the pads 1531 the loop going to the line relay R1210 of the long distance selector 1200, so that this selector is attacked again with a view to a new operation.

   In addition, when it drops, the occupancy relay R1530 prepares at the pads 1532 the circuit for the application of earth potential to the pulse conductor C1401; cuts to pads 1534 the circuit for the attraction of the OR10 rotation electro of the OR office switcher; and again prepares at the pads 1535 the circuit for the attraction of the electro of rotation DS3 of the switch sending digits DS. In addition, the occupancy relay R1530 cuts at pins 1536 the above-mentioned circuit to short-circuit the upper coil of the counter relay R1520, so that the upper and lower coils of the latter are excited in series, so that this last relay is attracted by its second step.

   When the counter relay R1520 is thus fully engaged, it prepares the pads 1522 for a point in a drive circuit of the lower coil of the counter relay Rl510.



  Finally, on reset, the occupancy relay R1530 cuts off at pins 1537 the circuit for applying earth potential to the erase conductor C1345, so that another operating cycle of the recorder-translator 1300 initiates when the erase relay R1325 drops out following the elimination of the earth potential of the erasing conductor C1345.



   At this time, and since the office switch OR occupies its third position in the first floor below, the office switch digit 7 is set so that the recorder-translator 1300 transmits this number, followed by the 475 code for the office requested and the number 1234 for the line requested, to attempt to route the call by the second choice channel.



   In the event that the interurban selector 1200 encounters a state of total occupation of junctions on the second choice lane, its wiper carriage is again eleven rotary steps away from its rotary idle position, by so that the occupancy relay R1530 attracts again, ensuring the return to the initial position of the recorder-translator 1300, the attraction of the second counter relay R1510 and the new attraction of the rotation electro OR10 of the OR office switcher, all in a manner substantially identical to that described above.

   At this time, and since the office switch OR occupies the fourth position in its first floor below, the office switch digits 8 and 5 are set in such a way that the recorder-translator 1300 transmits these, followed by the area code 475 of the requested office, and the number 1234 of the line requested, in order to attempt to establish the communication by the third choice channel.
In the event that the interurban selector 1200 encounters a state of total occupation of the junctions on the third choice channel, its rubbing trolley

  <Desc / Clms Page number 32>

 The rotors are again eleven rotating steps away from their normal rotating position.

   However, in this case, the occupancy relay R1530 is not attracted again, given the earlier attraction of the second counter relay R1510, which cut at the pins 1511 the occupancy conductor C1405 from the lower coil. occupancy relay R15300 Therefore, the recorder-translator 1300 attracts, to transmit all the aforementioned figures and ensures the attraction of the connection relay R1130 in the national trunk circuit 1100, after which the recorder-translator 1300 is released, all in the manner described above.

   At this time, a source of 120 earth pulses per minute is connected by the actuated set of switching springs S1235 and pads 1138 to the special test lead C1164 of junction 1160, to cause the full occupancy signal to be returned. connections to the operator position circuit 1003 of the automatic trunk switchboard 1000.



   By the way, it should be noted that in the case of a state of total occupation of the junctions in the switchgear beyond the trunk selector 1200 or in the case of a final busy state from the requested subscriber line 501 going to the called subscriber station T3 of the GF office, the full trunk busy signal or the busy line signal, as the case may be, will be returned on the connection by the 'intermediary of the special test wiper of the trunk selector 1200, and therefore on the special test lead G1164 of the junction 1160, so that the appropriate signal is fed back to the operator position circuit 1003 of the automatic trunk table 1000, all in the manner previously described.,

   
Coming back from the communication established between the operator position circuit 1003 of the automatic trunk panel 1000 of the trunk office AT and the called subscriber station T3 of the office GF, it should be noted that, when the subscriber of the called station T3 hangs up, an end of conversation signal is returned to the special test wiper of the interurban selector 1200, which produces an end of conversation signal to the attendant position circuit 1003. This operator connects again to the connection in order to verify the break and then operates its position apparatus in order to release the answering switch 1081 and the call switch 1082 of the junction shown, which has the effect of eliminating the earth potential of the test conductor C1163 of junction 1160.

   After this elimination, the bonding circuit of the connection relay R1130 of the national trunk circuit 1000 and of the connection relay R1250 of the trunk selector 1200 are cut off, and these relays drop out. When falling, the connection relay R1250 closes the circuit indicated above at the 1255 pads to the aeration of the release electro M1228, in order to cause the release of the interurban selector 1200, and therefore the release of various switches participating in the connection established with the called subscriber station T3 of the GF office.

   At this time, the elimination of earth potential of the control conductor C1163 at junction 1160 indicates the non-busy state of the national trunk circuit 1100 to the various call switches 1082, etc., which there. have access; and the connection established between the calling operator position circuit 1003 of the trunk panel 1000 of the trunk office AT and the called subscriber station T3 of the office GF is completely released, and all the equipment is available for service. new use.



   Chapter 7.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
AT AT THE SUBSCRIBER STATIONS OF THE GH OFFICE.



   The routing of a long distance call from the automatic trunk switchboard 1000 of the long distance office AT to a subscriber station, for example the T4 station of the long distance office GH, is carried out in a manner substantially identical to that described in chapter 6. In this case, the operator of the operator circuit 1003 of the automatic trunk switchboard 1000 can use the junction comprising the call switch 1082 and activate the key of the national trunk dial, to bring the switch on. 'call 1082 to attack the national intercity circuit 1100, so that the

  <Desc / Clms Page number 33>

 cheur 1130 can attack recorder-translator 1300. In this case, the operator of the position circuit dials the national long distance call number 614-464-1234 of the called subscriber set T4 of the GH office.



   This connection can be routed from the AT office directly through the first choice route to the GH office; the recorder-translator 1300 transmitting the code 462 of the requested office, followed by the number 1234 of the requested line. In this case, the connection may be routed from the national trunk circuit 1100, through trunk selector 1200, repeater circuit 301, trunk line 102, repeater circuit 521, input trunk selector 525, input selector office 528, the first selector 652, the second selector 653, the trunk connector 654 and the subscriber line 601, at the called subscriber station T4,
On the other hand, this call can be routed from the AT office, through the OB office, by the second choice route, to the GH office;

   the recorder-translator 1300 transmitting the office routing digit 7, followed by the code 464 of the office requested and the number 1234 of the requested line o In this case, the call can be routed from the national trunk circuit 1100 by trunk selector 1200, repeater circuit 303, trunk line 103, repeater circuit 410, input trunk selector 412, repeater circuit 416, trunk line 104, repeater circuit 523, selector ingress long distance 526, ingress office selector 528, first selector 652, second selector 653, long distance selector 654 and subscriber line 601, at called subscriber station T4.



   Finally, this call can be routed from the AT office, through the ML and OB offices, through the third choice route to the GH office; the recorder-translator 1300 transmitting the office routing digits 8 and 5, followed by the code 464 of the office requested and the number 1234 of the line requested o In this case, the call can be routed from the national trunk circuit 1100, through the trunk selector 1200, the repeater circuit 306, the trunk line 105, the repeater circuit 401, the input trunk selector 403, the repeater circuit 404.

   trunk line 106, repeater circuit 413, input trunk circuit 415, repeater circuit 416, trunk line 104, repeater circuit 523, input trunk line 526, office input selector 528, the first selector 652, the second selector 653, the trunk connector 654, and the subscriber line 601, at the called subscriber station T4.



    Chapter 8.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
RL AT THE SUBSCRIBER STATIONS OF THE GF OFFICE.



   The routing of a long distance call from the automatic trunk switchboard 830 of the long distance office RL to a subscriber station such as the T3 station of the GF office is carried out in a manner substantially identical to that described in chapter 6. In this case, the operator of the position circuit 831 of the automatic trunk switch 830 can use the internal junction comprising the call switch 833, and activate the national trunk dial key, to bring the switch to 'call 833 to attack the national long distance circuit 850, so that the researcher 851 can attack the recorder-translator 852. In this case, the operator of the position circuit forms the national long distance number 614-475-1234 of the extension Subscriber requested T3 from the GF office.



   This call can be established from the RL office directly through the first choice route to the GF office; the recorder-translator 852 transmitting the requested office code 475 followed by the number 1234 of the requested line. In this case, the call can be routed from the national trunk circuit 850 through the trunk selector 860, the repeater circuit 821, the trunk line 108, the repeater circuit 541, the input trunk selector 543, the trunk selector. trunk circuit 511, trunk line 107, trunk circuit 510, office input selector 515, first selector 516, second selector 517, trunk connector 518 and subscriber line

  <Desc / Clms Page number 34>

 501, at the called subscriber station T3.



   On the other hand, this call can be routed from the RL office through the VR and TS offices by the second choice route, to the GF office; the recorder-translator852 transmitting office switch digits 9 and 5, followed by the area code 475 of the office requested and the number 1234 of the requested line.

   In this case, the call can be routed from the national trunk circuit 850, through trunk selector 860, repeater circuit 825, trunk line 111, repeater circuit 735, trunk input selector 737, repeater circuit 731, trunk line 110, repeater circuit 725, trunk input selector 727, repeater circuit 721, trunk line 109, repeater circuit 546, trunk input selector 548, trunk circuit 511, trunk line 107, trunk circuit 510, office entry selector 515, first selector 516, second selector 517, trunk connector 518 and subscriber line 501, to the called subscriber station T3.



   Chapter 9.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
RL AT THE SUBSCRIBER STATIONS OF THE GH OFFICE, -,
During the routing of a long distance call from the automatic long distance switchboard 830 of the long distance office RL to a subscriber set, for example the T4 set, of the GH long distance office, takes place in a noticeable manner. identical to that described in chapter 6. In this case, the operator of position circuit 831 of the automatic trunk switch 830 can use the junction comprising the call switch 833 and activate the key of the national trunk dial, to bring the call switch 833 to attack the national trunk circuit 850, so that the searcher 851 can attack the recorder-translator 852.

   In this case, the operator of the position circuit 831 dials the national long distance number 614-464-1234 of the called subscriber set T4 of the GH office.



   This call can be routed from the RL office directly through the first choice route, to the GH office; the recorder-translator 852 transmitting the code 464 of the requested office, followed by the number 1234 of the line requested. In this case, the call can be routed from the national trunk circuit 850 through the trunk selector 860, the repeater circuit 821, the trunk line 108, the repeater circuit 541, the input trunk selector 543, the dial selector. The office entrance 528, the first selector 652, the second selector 653, the trunk connector 654 and the subscriber line 601, at the called subscriber station T4.



   On the other hand, this call can be routed from the RL office, through the VR and TS offices, by the second choice channel, to the GH office; the recorder-translator 852 transmitting the office switch digits 9 and 5, followed by the code 464 of the office requested and the number 1234 of the requested line.

   In this case, the call can be routed from national trunk circuit 850, trunk selector 860, repeater circuit 825, trunk line 111, repeater circuit 735, trunk input selector 737, trunk repeater 731, trunk line 110, repeater circuit 725, trunk input selector 727, repeater circuit 721, trunk line 109, repeater circuit 546, trunk input selector 548, input selector switch office 528, the first selector 652, the second selector 653, the trunk connector 654 and the subscriber line 601, at the called subscriber station T4.



   Chapter 10.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
GH AT THE BR.



   The routing of a long distance call originating from the automatic trunk panel 630 of the office GH and destined for a subscriber station, for example the station Tl of the office BR, is carried out in a manner substantially identical to that described in chapter 6. In this case, the operator of position circuit 631 of the automatic trunk switch 630 can use the internal junction.

  <Desc / Clms Page number 35>

 re including the call switch 633 and operate the national interurban dial key, to cause the call switch 633 to attack the national trunk 529, so that the searcher 530 can attack the recorder-translator 531. In this case, the operator of position circuit 631 dials the national long distance number 218-256-1234 of the called subscriber set T1 of the BR office.



   This call can be routed from office GH, directly by the first choice channel, to office BR; the recorder-translator 531 transmitting the code 256 of the requested office, followed by the number 1234 of the requested line. In this case, the call may be routed from the national trunk circuit 529, through trunk selector 549, repeater circuit 521, trunk line 102, repeater circuit 301, input trunk selector 321, trunk 211, trunk line 101, trunk 210, office entry selector 215, first selector 216, second selector 217, trunk connector 218, and subscriber line 201, at the called subscriber station T1.



   On the other hand, this call can be routed from office GH, through office OB, on the second choice channel, to office BR; the recorder-translator 501 transmitting the routing digit of office 8, followed by the code 256 of the office requested and the number 1234 of the line requested.

   In this case, the call can be routed from the national trunk circuit 529 through the trunk selector 549, the repeater circuit 523, the trunk line 104, the repeater circuit 416, the trunk entry selector 418, the repeater circuit. 410, trunk line 105, repeater circuit 303, input trunk selector 323, trunk circuit 211, trunk line 101, trunk circuit 210, office input selector 215, first selector 216, the second selector 217, the trunk connector 218 and the subscriber line 201, at the called subscriber station T1.



   Finally, this call can be routed to office BR through offices OB and ML, on the third choice channel, to office BR; the recorder-translator 531 transmitting the office switch digits 8 and 6, followed by the code 256 of the office requested and the number 1234 of the requested line.

   In this case, the call can be routed from the national trunk circuit 529, by the trunk selector 549, the repeater circuit 523, the trunk line 104, the repeater circuit 416, the trunk entry selector 418, the circuit repeater 413, trunk line 106, repeater circuit 404, input trunk selector 406, repeater circuit 401, trunk line 105, repeater circuit 306, input trunk selector 326, trunk circuit 211, trunk line 101, trunk circuit 210, office entry selector 215, first selector 216, second selector 217, trunk connector 218 and subscriber line 201, at the subscriber station requested T1.



   Chapter 11.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
GH AT THE AT OFFICE SUBSCRIBER STATIONS.



   The routing of a long distance call from the automatic long distance table 630 of the long distance office GH to a subscriber station, for example station T2, of the long distance office AT, is effected in a manner substantially identical to that described in chapter 6. In this case, the operator of the position circuit 631 of the automatic trunk switch 630 can use the junction comprising the call switch 633, and activate the key of the national trunk dial, to bring the switch on. 'call 633 to attack the national long distance circuit 529, so that the researcher 530 can attack the recorder-translator 531. In this case, the operator of the position circuit dials the national long distance number 218-267-1234 from the called subscriber station T2 of the AT office.



   This call can be routed from the GH office, directly by the first choice channel, to the AT office: the recorder-translator 531

  <Desc / Clms Page number 36>

 transmitting the code 267 of the requested office, followed by the number 1234 of the line requested. In this case, the call can be routed from the national trunk circuit 529, by the trunk selector 549, the repeater circuit 521, the trunk line 102, the repeater circuit 301, the trunk input selector 321, the selector office entrance 332, first selector 252, second selector 253, trunk connector 254 and subscriber line 221, at called subscriber station T2.



   On the other hand, this call can be routed from office GH, through office OB, by the second choice route, to office AT; the recorder-translator 531 transmitting the office routing digit 8, followed by the indication 267 of the requested office and the number 1234 of the requested line. In this case, the call can be routed from the national trunk circuit 529, by the trunk selector 549, the repeater circuit 523, the trunk line 104, the repeater circuit 416, the trunk input selector 418, the repeater circuit 410, the trunk line 103, the repeater circuit 303, the input trunk selector 323, the office input selector 332, the first selector 252, the second selector 253, the trunk connector 254 and the subscriber line 221, at the called subscriber station T2.



   Finally, this call can be routed from office GH, through offices OB and ML, on the third choice channel, to office AT; the recorder-translator 531 transmitting the office routing digits 8 and 6, followed by the code 267 of the office requested and the number 1234 of the requested line.

   In this case, the call can be routed from national trunk circuit 529 through trunk selector 549, repeater circuit 523, trunk line 104, repeater circuit 416, input trunk selector 418, repeater circuit 413, trunk line 106, repeater circuit 404, trunk input selector 406, repeater circuit 401, trunk line 105, repeater circuit 306, trunk input selector 326, office input selector 332, the first selector 252, the second selector 253, the trunk connector 254 and the subscriber line 221, at the called subscriber station T2.



   Chapter 12.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
GH AT THE SUBSCRIBER STATIONS OF THE RG OFFICE.



   The routing of a long distance call from the automatic trunk switchboard 630 of the long distance office GH to a subscriber station, for example station T5 of the office RG, is carried out in a substantially identical manner to that described in chapter 6. In this case, the operator of position circuit 631 of trunk switchboard 630 can use the internal junction comprising the call switch 633 and activate the national trunk dial key, to bring the switch to 'call 633 to attack the national long distance circuit 529, so that the researcher 530 can attack the recorder-translator 531. In this case, the operator of the position circuit dials the national long distance number 319-733-1234 from the required subscriber set T5 from the RG office.



   This call can be routed from the GH office, directly on the first choice channel, to the RG office; 731 transmitting the code 733 of the requested office, followed by the number 1234 of the line requested. In this case, the call can be routed from national trunk circuit 529, trunk selector 549, repeater circuit 541, trunk line 108, repeater circuit 821, interurban input selector 823, trunk circuit. trunk 811, trunk line 112, trunk circuit 710, office input selector 715, first selector 716, second selector 717, trunk connector '718 and subscriber line 701, -. . to the called subscriber station T5.



   On the other hand, this call can be routed from the GH office, through the TS and VR offices, on the second choice channel, to the RG office; the recorder-translator 531 transmitting the office routing digits 9 and 5, followed by the code 733 of the requested office, and the number

  <Desc / Clms Page number 37>

 1234 of the requested line.

   In this case, the call can be routed from the national trunk circuit 529, trunk selector 549, repeater circuit 546, trunk line 109, repeater circuit 721, input trunk selector 723, trunk repeater 725, trunk line 110, repeater circuit 731, trunk input selector 733, repeater circuit 735, trunk line 111, repeater circuit 825, trunk input selector 827, circuit trunk 811, trunk line 112, trunk circuit 710, office input selector 715, first selector 716, second selector 717, trunk connector 718, and subscriber line 701, at the telephone set. 'requested subscriber T5,

     Chapter 13.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL
OFFICE GH AT THE SUBSCRIBER STATIONS OF OFFICE RL.



   The routing of a long distance call from the automatic long distance switchboard 630 of the long distance office GH to a subscriber station, for example extension T6, of the long distance office RL, is effected in a substantial manner. identical to that described in chapter 6.

   In this case, the operator of the position circuit 631 of the automatic trunk switch 630 can use the internal trunk comprising the call switch 633 and activate the national trunk dial key, to bring the call switch 633 to attack. - quit the interurban circuit 529, so that the researcher 530 can attack the recorder-translator 631. In this case, the operator of the position circuit 631 dials the national long distance number 319-762-1234 from the telephone set. subscriber requested T6 from office RL.



   This call can be routed from the GH office, directly by the second choice channel, to the RL office; the recorder-translator 531 transmitting the code 762 of the requested office, followed by the number 1234 of the requested line. In this case, the call can be routed from the national trunk circuit 529, by the trunk selector 549, the repeater circuit 541, the trunk line 108, the repeater circuit 821, the trunk entry selector 823, the selector office entrance 855, first selector 856, second selector 857, trunk connector 858 and subscriber line 801, to called subscriber station T6.



   On the other hand, this call can be routed from the GH office, through the TS and VR offices, on the second choice channel, to the RL office; the recorder-translator 531 transmitting the office routing digits 9 and 5, followed by 1 vindictive 762 of the requested office and the number 1234 of the requested line.

   In this case, the call can be routed from the national trunk circuit 529, through the trunk selector 549, the repeater circuit 546, the trunk line 109, the repeater circuit 721, the toll entry selector 723, the repeater circuit 725 , trunk line 110, repeater circuit 731, trunk input selector 733, repeater circuit 735, trunk line 111, repeater circuit 825, input trunk selector 827, input trunk selector office 855, the first selector 856, the second selector 857, the trunk connector 858 and the subscriber line 801, at the called subscriber station T6.



   Chapter 14.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL
AT OFFICE AT THE SUBSCRIBER STATIONS OF THE RG OFFICE
It will now be assumed that the operator of the position circuit 1003 of the automatic trunk panel 1000 of the AT trunk office has answered a direct traffic call, using the answering switch 1081, intended for the called subscriber station T5 of the RG office. In this case, the operator of the calling position circuit 1003 first actuates the national trunk dial key forming part of her position equipment, to bring the call switch 1082 connected to the position circuit 1003 at this moment, operate automatically and select the group of national trunk circuits, including circuit 1100, and then a free circuit in that group.

   Assuming that call switch 1082 selects the circuit

  <Desc / Clms Page number 38>

 national long distance cooker 1100, the associated searcher 1150 operates to select a free recorder-translator in the associated group, for example recorder-translator 1300. When the call has been answered by the operator of position circuit 1003, the sender control circuit 236 has been automatically connected to this position circuit, so that sender 237 and recorder 238 have been armed and keypad 235 has been conditioned to check the recorder 238.



   At this time, therefore, the operator of position circuit 1003 operates keypad 235 in accordance with the national number of the called subscriber station T5, which is 319-733-1234. This number includes the network code 319, the office code 733 and the line number 1234o The recorder 238 registers and transmits the digits of the national number, so that these are recorded in the recorder-translator 1300 , after which the sender control circuit 236, the sender 237 and the register 238 are released.



   The recorder-translator 1300 responds to the network code 319, to determine whether the requested trunk line is far from or near the long distance office 218 of the requesting office AT. In the event that the recorder-translator 1300 determines that the requested trunk network is remote from the trunk network 218 of the requesting trunk office AT, this recorder-translator is controlled to transmit one or more point digits. network, to route the call to a long distance office located in a tandem long distance network and then retransmit the national long distance number as registered so that further routing of the call can take place under the control of the interurban office equipment of the aforementioned tandem interurban network.

   On the other hand, in the event that the recorder-translator 1300 determines that the requested trunk network is close to the trunk network 218 of the requesting trunk office AT, this recorder-translator responds to the callsign of the requested office. , to transmit one or more office switch digits. In this case, the recorder-translator 1300 also determines whether the office code, as recorded, is required during the subsequent routing of the call, and transmits this code, as recorded, if necessary. , and finally the number of the requested line. Therefore, in the event that it has been determined that the called network is close to the trunk network 218 of the requesting office AT, the recorder-translator 1300 completes the routing of the call directly to the called subscriber station.



   In the present example, the requested trunk network 319 is remote from the trunk network 218 of the requesting office AT. Thus, the recorder-translator 1300 operates to transmit one or more network switch digits, to route the call to a long distance office of a tandem long distance network, and retransmit then the national long distance number, as recorded, so that the subsequent routing of the call can be carried out under the control of the equipment of the long distance office of the long distance network, the aforementioned tandem. Specifically, the recorder-translator 1300 registers the national long distance number 319-733-1234 and initiates transmission of the network code digits, as described above.

   In the present example, there are three paths between the requesting interurban office AT and the interurban office GH of the tandem trunk network 614, these lanes respectively representing the first, second and third-choice lanes. The first choice route goes directly from the AT interurban office and the GH interurban office, through the disconnection comprising the interurban line 102; the second-choice channel passes through the office OB located between the interurban office AT and the interurban office GH, through disconnections comprising respectively the interurban lines 103 and 104;

   while the third-choice route passes through the offices of ML and OB located between the interurban office AT and the interurban office GH, through disconnections comprising respectively the interurban lines 105, 106 and 104.



   Therefore, the DVR 1300 attempts to use the first choice channel by transmitting the network turnout digits 4 and 8, followed by the national long distance number 319-733-1234, as recorded. In the

  <Desc / Clms Page number 39>

 If this first choice channel is available, trunk selector 1200 can react to the first digit of network code 4, to select the group of repeater circuits, including circuit 301, and then a free circuit in this. group. The trunk selector 1200 may select the repeater circuit 301, such that the latter controls the repeater circuit 521 on the trunk line 102, to drive the trunk selector 525.

   The latter can react to the second digit of network code 8, to select the group of national trunk circuits, including circuit 529, and then a free circuit in this group The trunk input selector 525 can select the national trunk circuit 529 , after which the searcher 530 can select the recorder-translator 531 from the associated group.When the national long distance number 319-733-1234 is then transmitted by the recorder-translator 1300, it is received and re-registered in the recorder-translator 531.

   The subsequent operation of the latter, following the registration of the national long distance number 319-733-1234, to control the switchgear for the purpose of routing the call to the telephone station. requested subscriber T5 of the RG office, is the same as that described in chapter 12.



   When, during the operation of the recorder-translator 1300, the trunk selector 1200 encounters a state of total occupation of the junctions on the first choice channel, after sending the first digit of network code 4, this recorder-translator is ordered to attempt a second choice channel, by transmitting network switch digits 7, 4 and 8, followed by the national long distance number 319-733-1234, such as in- register.



   In the event that this second-choice channel is available, the call is routed in a manner substantially identical to that described above and can use the trunk selector 1200, the repeater circuit 303, the trunk line 103. , the repeater circuit 410, the input trunk selector 412, the repeater circuit 416, the trunk line 104, the repeater circuit 523, the input trunk selector 526, and the national trunk circuit 529; the routing of the call from this circuit to the called subscriber station T5 being the same as that described in chapter 12.



   When, during the operation of the recorder-translator 1300, the trunk selector 1200 encounters a state of full occupation of junctions on the second choice channel and after sending the first digit 7 of the network code, the Recorder-Translator 1300 is ordered to attempt third-choice routing, transmitting the network turnout digits 8, 5, 4, and 8, followed by the national long distance number 319-733-1234, as recorded.

   In the event that this third-choice channel is available, the call is routed in a manner substantially identical to that described above and can use the trunk selector 1200, the repeater circuit 306, the trunk line 105, the repeater circuit 401, trunk input selector 403, repeater circuit 404, trunk line 106, repeater circuit 413, trunk input selector 415, repeater circuit 416, trunk line 104, repeater circuit 523, selector long distance entry 526 and the national long distance circuit 529; the routing of the call from this circuit to the called subscriber station T5 being the same as that described in chapter 12.



   When during the operation of the translator-recorder 1300, the trunk selector 1200 encounters a state of total occupation of junctions on the third choice channel and after sending the first network routing digit 8, the recorder- translator 1300 is not ordered to attempt a route of another choice. More specifically, when the trunk selector 1200 finds a state of full trunk occupation on the third choice channel, it returns a full trunk occupancy signal to the operator position circuit 1003 of the automatic trunk panel 1000, thus indicating the present state of affairs.



   In addition, when during call routing on a

  <Desc / Clms Page number 40>

 any one of the channels, a following interurban selector interposed in the channel between the interurban selector 1200 and the national circuit of the office GH, succeeded in finding a state of total junction occupation, a signal of total junction occupancy, a corresponding trunk full occupancy signal would be returned to the operator position circuit 1003 of the automatic trunk board 1000, in order to indicate this state of affairs.

   In addition, and concerning the routing of this call, it should be noted that an alternative disconnection is established between the long distance office GH located in the tandem long distance network 614, on the one hand, and the requested office RG located in the requested trunk network 319, on the other hand, as explained in chapter 12, so that a full trunk busy signal can be returned from this switchgear to the position circuit. operator 1003 of automatic trunk switchboard 1000, thus indicating this state of affairs.



   Finally, when during the routing of a call, a long distance connector, having access to the requested subscriber line, notes by test that this line is busy, a corresponding busy signal is sent on the connection going. to the operator position circuit 1003 of the automatic trunk panel 1000, in order to indicate this state of affairs a The total trunk busy signal has 120 pulses per minute, while the line busy signal has 60 pulses per minute , all as explained in chapter 6.



   We will now consider in more detail, and with reference to figs. 10 to 15 inclusive, the operation of the recorder-translator 1300 during the routing of the call in question from the operator position circuit 1003 of the automatic trunk panel 1000 of the AT trunk office, up to to the national trunk circuit 529 of the interurban office GH located in the tandem trunk network 614. The attack on the national trunk circuit 1100 and the recorder-translator 1300, and the recording, which follows, of the various The digits of the national long distance number 319-733-1234 in the personal recorder-translator 1300 are the same as those described in chapter 6.

   In the present example, storing the network code digits 3,1 and 9, in the respective network code recorders A1, A2 and A3 has the effect of turning the composite network switch AC in the ninth position of its third stage and a selection of the first wiper AC1, so that the network needle AR can be brought to the eighth position of its eighth stage. Likewise, registering the office code digits 7, 3 and 3 in the respective office code recorders 01,02 and 03 results in a corresponding tuning of the office composite switch OC, and therefore a corresponding tuning of the OR desktop switcher, these last two tunings having no consequences in the present example, as will be explained more fully below.



   More specifically, when the network switch AR is brought to the eighth position of its eighth stage, the control circuit of the network relay R1330 is not closed, since the wiper AR3 is engaged on an open pin of the associated bench . The fact that this relay does not attract is equivalent to a finding, by the recorder-translator 1300, that the requested trunk network 319 is far from the requesting trunk network 218 and that a national trunk circuit of an office trunk located in a tandem trunk network should be used for routing this call.

   More specifically, when the network switcher AR is brought to the eighth position of its eighth stage, the wipers AR4 and AR5 respectively establish the routing digits of networks 4 and 8 in the marking cable 1344.



   At the moment when the transmission operation of the recorder-translator 1300 is initiated, the first network routing digit 4 is transmitted, while the sequential switch SS occupies its first position or idle position; and, the second network routing digit 8 is transmitted when this switch occupies its second position. This switch is then brought to pass through its 3rd, 4th and 5th positions in the manner of a buzzer.

  <Desc / Clms Page number 41>

 flower as a result of the connections between the wipers AR6, AR7 and AR8 on the one hand and the erase conductor C1345 on the other hand.

   The sequential switch SS is then actuated in a sequential manner so as to pass from its 6th to its 15th position, so that the respective digits of the national intercity number 319-733-1234, recorded respectively in the ten registers individual records of the recorder-translator 1300 are transmitted.

   The send sequential switch SS is then brought to its 16 th position, to ensure the release of the recorder-translator 1300 As explained above, the office routing digits 4 and 8 ensure the routing. call from the national interurban circuit 1100 to the national interurban circuit 529; so that the national long distance number 319-733-1234 registered in the recorder-translator 1300 is transmitted therefrom and is recorded in the recorder-translator 531.



   The use of an alternating disconnection under the action of the recorder-translator 1300 is ensured in a manner substantially identical to that described in chapter 6. More especially, in the case of actuation of the relay. occupancy R1530, an earth potential is applied to pads 1534, to ensure the excitation of the rotation electro AR10 of the network switch AR due to the released state of the network relay R1330 and of the closed position of the pads 1332. More particularly, in the case of a total occupation of the junctions on the first choice channel, the occupancy relay R1530 is attracted to bring the network switch AR to the 'ninth position of its eighth floor, thus establishing the network switch numbers 7, 4 and 8.

   Likewise, in the case of a total occupation of the junctions the corresponding occupancy relay is attracted to bring the network switch AR to the tenth position of its eighth stage, thus establishing the network switch digits 8 , 5, 4 and 8. Subsequent operation of the 1300 recorder-translator is the same as described in chapter 6.



   Chapter 15.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OFFICE
AT AT THE SUBSCRIBER STATIONS OF THE RL OFFICE.



   The routing of a long distance call from the automatic long distance table 1000 of the AT long distance office to a subscriber set, for example the T6 set of the R1 office, is carried out in a manner analogous to that described in chapters 14 and 6. More specifically, the routing of the call from the automatic trunk table 1000 to the national trunk circuit 1100, and from there to the national trunk circuit 529, is the same as that described in chapter 14: while the routing of the call from the national trunk circuit 529 to the called subscriber station T6 is the same as that described in chapter 13.



   Chapter 16.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
RL AT THE BR.



   The routing of a long distance call from the automatic long distance table 830 of the long distance office RL to a subscriber station, for example the Tl station of the office BR, is carried out in a manner analogous to that described in chapters 14 and 6. More specifically, this call may be routed from the attendant position circuit 831 of the automatic trunk switch 830 through the call switch 833, to the national trunk circuit 850; so that the searcher 851 can attack the recorder-translator 852.

   The national long distance number 218-256-1234 is then stored in the recorder-translator 852; and, the latter determines that the requested network 218 is distant from the requesting network 319, and that the call should be routed to a national trunk circuit of the GH trunk office located in the tandem trunk network 614. Therefore, the circuit national trunk 850 sets up network routing digits 4 and 8, which are the preferred route, and then transmits network routing digits 4 and 8, followed by a national interurban number 218-256-1234, as recorded.

   The call can be routed

  <Desc / Clms Page number 42>

 from the national trunk circuit 850, through the trunk selector 860, the repeater circuit 821, the trunk line 108, the repeater circuit 541 and the input trunk selector 543, to the national trunk circuit 529; and, finder 530 may select recorder-translator 531, so that the national long distance number 218-256-1234 stored in recorder-translator 852 is transmitted therefrom and stored in recorder-translator 531.



   In the event that there is a fully occupied state of the junctions on this first choice channel, the recorder-translator 852 is drawn again, to establish the network digits 9,5, 4 and 8, which correspond to the second choice channel, and then transmits the trunk routing digits 9.5, 4 and 8, followed by the national long distance number 218-256-1234.



  The call can be routed from national trunk circuit 850, trunk selector 860, repeater circuit 825, trunk line 111, repeater circuit 735, input trunk selector 737, repeater circuit 731, trunk line 110, repeater circuit 725, input trunk selector 727, repeater circuit 721, trunk line 109, repeater circuit 546 and input trunk selector 548, to national trunk circuit 529; and, finder 530 may select recorder-translator 531, so that the national long distance number 218-256-1234, stored in recorder-translator 852, is transmitted therefrom and re-stored in l 'recorder-translator 531.



   The subsequent operation of the latter following the registration of the aforesaid national long distance number, with a view to ensuring the routing of the call to the requested subscriber station Tl of the office BR, is the same as the one described in chapter 10.



   Chapter 17.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
RL AT THE AT OFFICE SUBSCRIBER STATIONS.



   The routing of a long distance call from the automatic long distance table 830 of the RL office to a subscriber station, for example the T2 station of the AT office, is carried out in a manner analogous to that described in chapters 14 and 6 More specifically, the call routing from automatic trunk switch 830 to national trunk 850 and from there to national trunk 529 is the same as that described in chapter 16; while the routing of the call from national trunk circuit 529 to called subscriber station T2 is the same as that described in chapter 11.



   Chapter 18.



     DELAYED INTER-CALLS
The various long distance calls described in chapters 6 to 17 inclusive can be set up from the appropriate automatic long distance tables 1000, 630 and 830 as deferred calls. For example, it will be assumed that a deferred call is to be routed from the operator position circuit 1003 of the automatic toll table 1000 under a deferred call regime, to the subscriber station T3 of the GF office. It goes without saying that, in this case, the operator of the position circuit 1003 has not answered a direct traffic call and must select a free internal junction, for example the junction shown, and actuate the control key. associated interior junction, to make the connection of this junction to the operator position circuit 1003.

   The attendant then activates the = rear dialing or response key K1001 of position circuit 1003, to cause the pulling of the auxiliary rear dialing relay R1010. As it emerges from FIG. 10, this relay, by attracting, connects by the pads 1011 the conductor C1031 to the conductor C1033 going to the special test wiper or EC2 of the response switch 1081. In addition, at this moment, the actuation of the key K1001 ensures the connection of the transmission control circuit 236, through the operator position circuit 1003, to the answer switch 1081, so that the associated sender 237 and the recorder 238 are operatively linked to the switch response 1081.

   In addition, when the aforementioned key K1001 is

  <Desc / Clms Page number 43>

 thus activated, automatic operation of answering switch 1081 is initiated, such that this switch selects the associated group of delayed call switches, and then a free switch in that group.



  For example, answering switch 1081 may automatically operate to select delayed call switch 234, such that sender control circuit 236 is operatively connected to that switch.



   The operator of position circuit 1003 then momentarily activates the national trunk dial key K1002, so that an earth potential is applied to conductor C1033 going to response switch 1081, and then removed from that conductor, from so that the number 1 is transmitted by the intermediary of this switch to the ascension electro of the delayed call switch 234, so that the friction carriage of the Strowger mechanism of the latter switch is moved away from one step, in the vertical direction, from its vertical position of repbs. This scrubber trolley is then automatically actuated to select a free junction in the group comprising junction 1160.

   For example, the deferred call switch 234 can select the junction 1160 going to the national interurban circuit 1100, thus causing the researcher 1150 to select a free recorder-translator in the associated group, for example the recorder-translator 1300, So, at this time, sender control circuit 236 is operatively linked through attendant position circuit 1003, answering switch 1081, delayed call switch 234, and trunk 1160, to the national trunk circuit. 1100, and from there to the recorder-translator 1300.



   At this time, when. the operator @u position circuit 1003 registers the national number 614-475-1234, this number is recorded in the recorder 238 and sent by the sender 237 to the recorder-translator 1300 where it is recorded, The subsequent operation of the recorder-translator 1300 with a view to routing the call to the called subscriber station T3 of the GF office operates as in chapter 6.

   The attendant then returns the rear dial key K1001 of the position circuit 1003 to idle, so that the sender control circuit 236 is operatively connected to the call switch 1082. The operator of the position circuit 1003 can now establish through call switch 1082 any of the links described in chapters 6 to 17 inclusive. The subsequent control and release of these deferred call connections corresponds to those described in Chapter 6.



   Chapter 19.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL AT OFFICE TO THE AUTOMATIC INTER-URBAN OFFICE GH,
The operator of the position circuit 1003 of the automatic trunk switchboard of the AT long distance office can route a direct call to the automatic trunk switch 630 of the GH long distance office, without involving the national long distance circuit, only by establishing the operator code. - miss on keypad 235, without pressing the long distance dialing key. national associated. In this example the operator code is 40 and the first digit 4 can be sent by sender 237 to call switch 1082 so that the latter can select repeater circuit 301.

   The latter attacks the repeater circuit 521 through the trunk line 102 and determines the subsequent attack of the trunk input selector 525. The sender 237 then sends the digit 0, thus activating the input inter-city selector. 525, so that the latter can select the incoming trunk 641. The latter controls the traffic distributor 645, which assigns an available operator position from the automatic trunk switchboard 630. It will be assumed that the distributor has assigned the number. first operator position circuit 631; in this case, the interior junction distributor 644 is controlled to assign one of the interior junctions associated therewith, for example the junction shown.

   The starter circuit 643 and the interior junction distributor 644 c then command the response switch 632 to cause it to select the incoming junction circuit 641. The operator of the position circuit 631 of the automatic trunk switch 630 responds to call and converse with the circuit operator

  <Desc / Clms Page number 44>

 of position 1003 of the automatic toll table 1000 and receives the indications concerning the routing of the call.



   Chapter 20 ,,.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
RL AT THE AUTOMATIC INTER-URBAN PANEL IN OFFICE GH.



   The operator of position circuit 331 of the automatic trunk switchboard 830 of the long distance office RL can route a direct call to the automatic trunk table 630 of the GH office, without involving the national trunk, simply by pressing the operator code on keypad 835, without pressing the national long distance dialing key.



  In this example, the operator code is 40, and the first digit 4 can be sent by sender 837 to call switch 833, so that the latter can select repeater circuit 821. The latter performs the drive. repeater circuit 541 via trunk line 108 as well as subsequent drive of input trunk selector 543. Sender 837 then transmits the digit 0, causing selector d to operate. trunk entry 543, so that the latter can select the incoming trunk circuit 641. The latter circuit controls the traffic distributor 645 and causes it to assign an available operator position to the automatic trunk switch 630.

   Assuming that the first attendant position circuit 631 is assigned, the interior junction distributor 644 is controlled to assign one of the interior junctions associated with it, for example the junction shown,
The starter circuit 643 and the inside trunk distributor 644 then control the answer switch 632 to cause it to select the incoming trunk circuit 641. The operator of position circuit 631 of the automatic trunk switch 630 responds. then on the call and converses with the operator of the position circuit 831 of the automatic trunk switch 830 and receives the indications concerning the routing of the call.



   Chapter 21.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
GH AT THE AUTOMATIC INTER-URBAN PANEL AT THE AT OFFICE.



   The operator of the position circuit 631 of the automatic trunk switch 630 of the GH trunk office can route a direct call to the automatic trunk line 1000 of the AT trunk station, without interfering with the national trunk circuit, only by pressing l 'operator code on keypad 635, without pressing the associated national interurban dialing key. In this example, the operator code is 20 and the first digit 2 can be sent by sender 637 to call switch 633, so that the latter can select repeater circuit 521. The latter provides service. attack of repeater circuit 301 on trunk line 102, and subsequent attack of trunk entry selector 321.

   Sender 637 then sends the number 0, thereby activating interurban input selector 321, which can select incoming trunk circuit 241. This latter circuit controls traffic distributor 245, which assigns a position. operator available from the automatic trunk switch 1000. Assuming that the distributor assigns the first operating position circuit 1003, the interior trunk distributor 244 is controlled to assign one of the associated interior trunks, for example the junction shown. The starter circuit 243 and the inner trunk distributor 244 then control the response switch 1081 to cause it to select an incoming trunk circuit 241.

   The operator of the position circuit 1003 of the automatic trunk board 1000 then answers the call and talks with the operator of the position circuit 631 of the automatic trunk board 630 and receives the indications concerning the required routing of the telephone. 'call.

  <Desc / Clms Page number 45>

 



    Chapter 22,
INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
GH AT THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE RL.



   The operator of the position circuit 631 of the automatic trunk switch 630 of the GH long distance office can route a direct call to the automatic long distance table 830 of the long distance office RL, without interfering with the national long distance circuit, only by pressing l 'operator code on keypad 635, without pressing the associated national long distance dial key. In the present example, the operator code is 70, and the first digit 7 can be sent by sender 637 to call switch 633, which then selects repeater circuit 541. The latter assumes the drive. repeater circuit 821 on trunk line 108, and the subsequent attack on trunk input selector 823.

   The sender 637 then sends the digit 0, ensuring the operation of the interurban input selector 823, which can select the incoming trunk circuit 841. This latter controls the traffic distributor 845, in order to assign an available attendant position from the automatic trunk switchboard 830. Assuming that the distributor has assigned the first attendant position circuit 831, the inside trunk distributor 844 is controlled to assign one of the associated interior junctions, for example the trunk represented.



  The starter circuit 843 and the internal trunk distributor 844 then control the answer switch 832, to cause it to select the incoming trunk circuit 841. The operator of the position circuit 831 of the automatic trunk board 830 then responds to the call. 'call and converse with the operator of the position circuit 631 of the automatic trunk switch 630, to receive the indications concerning the routing of the call.



   Chapter 23.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN WATER PANEL
AT AT THE SUBSCRIBER STATIONS OF THE BR OFFICE AND AT THE AT OFFICE.



   In the event that the operator of the position circuit 1003 of the automatic long distance switchboard 1000 of the AT long distance office has answered an incoming long distance call which must terminate either at the BR office or at the AT long distance office, she operates only the keypad. 235 according to the code of the office requested and the number of the line requested. For example, a call can be routed from operator position circuit 1003 of automatic trunk table 1000 to called subscriber station T1 in office BR by typing number 256-1234 on keypad 235, thereby taking sender 237. to send the individual digits of that number directly to the switch train.

   Call switch 1082 can respond to the first digit 2 of the office code, to select access selector 331; last one can react to the second digit 5 of the office code, to select the junction circuit 211, which ensures the drive of the junction circuit 210 on the junction line 101, as well as the subsequent drive of the junction circuit. office input selector 215; last one can react to the third digit 6 of the office code, to select the first selector 216. Following the line number 1234, the call can then be extended by the first selector 216, the second selector 217 and the. long distance connector 218, to the subscriber line 201 going to the called subscriber station Tl.



   Likewise, a call can be routed from the operator position circuit 1003 of the automatic trunk panel 1000 to the requested subscriber station T2 of the long distance office AT, by entering the number 267-1234 on the keypad 235. which causes sender 237 to send the individual digits of that number directly into the switch train. Call switch 1082 can respond to the first digit 2 of the office code, to select access selector 331; the latter can react to the second digit 6 of the office code, to select the office input selector 332; the latter can react to the third digit 7 of the office code, to select the first selector 252.

   Following line number 1234, the call can then be routed through first selector 252, second selector 253 and long distance connector 254, to subscriber line 221 going to called subscriber station T2.

  <Desc / Clms Page number 46>

 



   Chapter 24.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE BU @ WATER
GH AT THE SUBSCRIBER STATIONS OF THE GF OFFICE AND THE GH OFFICE.



   In the event that the operator of position circuit 631 of the automatic trunk panel 630 of the GH trunk office has answered an incoming call which must terminate either at the GF office or at the GF trunk station, she only activates the keypad 635 in accordance with the requested office code and the number of the requested line. For example, a call can be routed from the operator position circuit 631 of the automatic trunk panel 630 to the called subscriber station T3 of the GF office, by entering the number 475-1234 on the keypad 635. , thereby causing sender 637 to send the individual digits of that number directly into the switch train.



  Call switch 633 can respond to the first digit 4 of the office code, for. select access selector 651; the latter can react to the second digit 7 of the office code, to select the trunk circuit 511, ensuring the attack of the trunk circuit 510 on the trunk line. tion 107 and then the attack on the office input selector 515; the latter can react to the third digit 5 of the office code, to select the first selector 516. Following the line number 1234, the call can then be routed by the first selector 516, the second selector 517 and trunk connector 518, to subscriber line 501 terminating at called subscriber station T3.



   Likewise, a call can be routed from the operator position circuit 631 of the automatic trunk panel 630 to the called subscriber station T4 of the long distance office GH, by entering the number 464-1234 on the keypad 635 taking away thus sender 637 sends the individual digits of that number directly into the switch train. Call switch 633 can respond to the first digit 4 of the office code, to select access selector 651; last can react to the second digit 6 of the office code, to select the office input selector 528; and, the latter can react to the third digit 4 of the office code, to select the first selector 652.

   Following line number 1234, the call can then be routed through the first selector 652, the second selector 653 and the trunk connector 654, to the subscriber line 601 going to the called subscriber station. T4.



   Chapter 25.



   INTER-URBAN CALLS FROM THE AUTOMATIC INTER-URBAN PANEL OF THE OFFICE
RL AT THE SUBSCRIBER STATIONS OF THE RG OFFICE AND THE RL OFFICE.



   In the event that the operator of the position circuit 831 of the automatic interurban panel 830 of the RL office has answered an incoming long distance call whose final establishment must be provided either by the RG office or by the RL long distance office, it simply activates the keypad 835 according to the code of the office requested and the number of the line requested.



  For example, a call can be routed from the operator position circuit 831 of the automatic trunk panel 830 to the called subscriber station T5 of the RG office, by entering the number 733-1234 on the keypad 835. , thereby causing sender 837 to send the individual digits of that number directly into the switch train. Call switch 833 can respond to the first digit 7 of the office code to select access selector 853; the latter can react to the second digit 3-of the office code, to select the junction circuit 811 which ensures the drive of the junction circuit 710 on the junction line 112 and then the drive of the input selector of office 715; the latter can react to the third digit 3 of the office code, to select the first selector 716.



  Following the line number 1234, the call can then be routed through the first selector 716, the second selector 717 and the long distance connector 718, to the subscriber line 701 going to the called subscriber station T5.



   Likewise, a call can be routed from the operator position circuit 831 of the trunk panel 830 to the called subscriber station T6 of the trunk station RL, by entering the number 762-1234 on the keypad 835, taking

  <Desc / Clms Page number 47>

 thus sender 837 sends the individual digits of that number directly into the switch train. Call switch 833 can respond to the first digit 7 of the office code, to select access selector 853; the latter can react to the second digit 6 of the office code, to select the office input selector 855; and, the latter can react to the third digit 2 of the office code, to select the first selector 856.

   Following the line number 1234, the call can then be routed through the first selector 856, the second selector 857 and the trunk connector 858, to the subscriber line 801 going to the called subscriber station T6.



   Chapter 26.



   VARIOUS INTERCONNECTIONS.



   In the preceding chapters 6 to 25 inclusive, we have described the main and direct routes by junctions from the various automatic toll tables of the different toll offices; however, it is understood that the operators can use several other interconnection paths through the various switches. For example, as explained in chapter 6, it is envisaged that the operator of the position circuit 1003 of the automatic trunk switchboard 1000 of the AT trunk office first activates the associated national trunk dial key, before dialing the national number 614. -475-1234 of the called subscriber station T3 of the GF office; however, the operator of position circuit 1003 will quickly find that she can use the prefix number 1 instead of operating this key.

   Although the operations which preceded this manipulation of the keyboard 235 in the operator position circuit 1003 are substantially identical to those described in chapter 6, it is envisaged that only the most experienced operators will use this alternative, given that it is necessary to preserve the national long distance numbering scheme described above.



   Chapter 27.



   CONCLUSIONS.



   It emerges from the foregoing that the present invention makes it possible to establish a long distance telephone interconnection system serving an extended territory and characterized in that the operator of the trunk switchboard of any outgoing office has access switchgear and control equipment, so that it can route a long distance call directly to any called subscriber station connected to any incoming office, without the aid of a operator of a long distance switchboard of any other office and whatever the relative positions of the departure and arrival offices in the telephone system, only by pressing on the keypad associated with her position a national long distance number including a network code which identifies the requested network,

   an office code which identifies the office requested in this requested network, and a line number which identifies the line requested in this requested office.



   Although the embodiment of the invention presently considered preferable has been described, it goes without saying that this is subject to various modifications, and the following claims are intended to cover all aspects. modifications which are consistent with the principle and scope of the invention.



   CLAIMS.

** ATTENTION ** end of DESC field can contain start of CLMS **.


    

Claims (1)

1. - Long distance telephone interconnection system serving a territory divided into several networks, each of which is assigned an individual multi-digit network code, characterized in that each of these networks comprises a series of offices assigned individual multi-digit office codes and each comprising several lines assigned individual multi-digit line numbers, each of these offices being provided with switchgear; a transmitter recorder arranged in one of these offices in one of these networks and comprising a <Desc / Clms Page number 48> series of network recorders called upon to record the individual digits of the requested network code, several recorders of office codes called upon to record the individual digits of the requested office code, several line recorders called upon recording the individual digits of the number of the line requested, means for receiving the individual digits of the code of the requested network and of the code of the office requested as well as of the number of the line requested and for storing them in those of the aforementioned recorders which correspond to them, a network routing mechanism, means controlled according to the individual network digits stored in said network loggers, for selectively operating said network routing mechanism, an office routing mechanism, means monitored according to the individual digits of the code of office routing mechanism registered in this office routing mechanism, to selectively actuate the latter, means controlled in accordance with the operation of the latter mechanism, to determine whether the requested network is remote or close to the network in question, means controlled by the said determination means, to select said network routing mechanism in the event that it is determined that the requested network is remote from the considered network, and to select the office routing mechanism in the event that it is determined that the requested network is close to the considered network, and means including which of these mechanisms has been selected, for controlling the operation of said device. - switching backhaul, in order to establish a connection between the considered office of the considered network, on the one hand, and the corresponding requested line of the corresponding requested office of the corresponding requested network. 2. A long distance telephone interconnection system, according to claim 1, in which means controlled in accordance with the individual digits of the office code, recorded in the office code recorders, are called upon to selectively actuate said. office routing mechanism, for establishing one or more office routing digits, said system comprising means controlled in accordance with the operation of said network routing mechanism, to determine whether the requested network is remote or close to the network in question, means controlled by these determining means, for selecting the said established network routing digit (s) and the digits recorded from said network code, as well as from said office code and said telephone number. line, in the event that it is determined that the requested network is remote from the network under consideration, and to select the said established office switching digit (s) and the stored office code digits, as well as the number line, in the event that it is determined that the requested network is close to the considered network, a digit transmitter acting to send digits selected by said selector means, and means for actuating this digit transmitter. 3. - Long distance telephone interconnection system according to claim 2, comprising busy signaling means responsive to a busy state in a selected network route, for transmitting a release signal therein. and to again actuate said network routing mechanism to establish one or more alternate network routing digits, and responsive to a busy state in a selected office route, to transmit a release signal in this, and to again actuate said office routing mechanism, to establish one or more alternate office routing digits, and means controlled by said busy signaling means, to activate the said digit transmitter again. 4.- Long distance telephone interconnection system according to claim 3, comprising counting means controlled by a determined number of reactions, busy signaling means, to prevent them from reacting again, and means controlled by the absence of reaction from the busy signaling means, for returning a busy signal., 5.- Long distance telephone interconnection system according to claim 1, comprising network conductors terminating at the recorders <Desc / Clms Page number 49> network code, office conductors leading to office code recorders, line conductors leading to line number registers, routing conductors, means controlled by said determining means, to connect the routing conductors to the network routing mechanism in case it is determined that the requested network is remote from the network under consideration, and to connect these routing conductors to the office routing mechanism and to mark the network conductors so as to prevent their selection, in the event that the requested network is determined to be close to the network under consideration, a sequential switch acting to select the routing conductors and then the network conductors when they are not are not marked so as to prevent their selection, and then the office conductors and then the line conductors, means for actuating this sequential switch, a digit transmitter operating so as to send digits following the selection of said conductors by the sequential switch, and which correspond respectively to the digits established in the forwarding mechanism which has been connected and which are recorded in the respective recorders; and means for actuating this digit transmitter. 6. - Long distance telephone interconnection system according to claim 5, comprising means jointly controlled by the determining means, in the event that it is determined that the requested network is close to the network considered, and by the actuation of the mechanism. office routing, to selectively mark office conductors to prevent their selection. 7. A long distance telephone interconnection system according to claim 5 or 6, comprising busy signaling means responsive to a busy state in a selected network route, for transmitting a release signal therein and for activate the network routing mechanism again to establish one or more alternate network routing digits, and responsive to a busy condition in a selected office routing, to transmit a release signal in that here and to activate the office routing mechanism again to establish one or more alternate office routing digits, and means controlled by the busy signaling means, to release and to then actuate the sequential switch again. 8. A long distance telephone interconnection system according to claim 2, comprising means jointly controlled by the determining means and by the stored digits of the network code, for establishing one or more network routing digits and for selecting. - ter this network routing digit (s) and the recorded digits of this network code and office code, as well as the line number, in the event that it is determined that the requested network is remote from the network in question , and additional means jointly controlled by said determining means and by the recorded digits of the office code, to establish one or more office routing digits and to select the aforesaid office routing digit (s) and stored digits of the office code, as well as the line number, in case it is determined that the requested network is close to the considered network 9. A long-distance telephone connection system according to claim 8, comprising busy signaling means responsive to a busy state in a selected network route, for transmitting a release signal therein. and to re-establish one or more alternate network routing digits, responsive to a busy condition in a selected office routing, for transmitting a release signal therein and for re-establishing one or more alternate office routing digits, and means controlled by the busy signaling means, for actuating said digit transmitter again . <Desc / Clms Page number 50> 10. A long distance telephone interconnection system according to claim 1, in which each of the long distance offices comprises an operator switch panel and a recording equipment, each of these offices comprising an automatic switching equipment, and means which can be controlled. call from any calling operator switchboard from any calling long distance office, to route a call from that office to the associated recording equipment, and then to store therein a requested network code, a requested office code and requested line number; each of these recording apparatus comprising means responsive to the recording of a requested network code identifying a remote requested network, for actuating some of said switching devices, with a view to routing the call thereof to a recording equipment of an interurban office located in a tandem network interposed on the path leading to the requested remote network, and then to record the code of the requested network, the requested office code and the number of the requested line, in the last-mentioned recording apparatus, each of said recording apparatus comprising additional means reacting to the recording of a call sign, requested network identifying a nearby requested network, to operate other switching devices among those mentioned above, in order to route the call from them to the requested office of the nearby requested network, and then to the requested line of this office. 11. - A long distance telephone interconnection system according to claim 10, comprising other means responsive to the registration of a requested network code identifying a nearby requested network, to send one or more routing digits, and then the. number of the requested line, to other of said switching devices, to determine an actuation of these in order to route the call from the last mentioned device to the requested office located in the requested network rap - close, and then to the requested line, connected to the requested office. 12. A long distance telephone interconnection system according to claim 10, wherein each of said recording equipment comprises means for recording a requested network code, a requested office code and a requested line number, which are transmitted to it. - set, each of these devices comprising additional means responsive to the recording of a requested network indicator identifying a remote requested network, to send one or more routing digits to some of these switching devices, in view to determine an actuation of these for the purpose of routing the call from the last mentioned switchgear to a switchgear provided in a long distance office located in a tandem network interposed in the path to the remote called network , and then to send this requested network code and the requested office code, together with the requested line number to the last-mentioned device, each of these devices comprising other means responsive to the request. recording of a requested network code identifying a nearby requested network, to send one or more switching digits, and then the requested line number to other switching devices among those mentioned above, in order to cause their operation in view of the routing of the call from the last mentioned apparatus to the requested office located in the nearby requested network, and from there to the requested line, connected to this office. 13. A long distance telephone interconnection system according to claim 1, in which each of said networks comprises an interurban office and one or more ordinary offices assigned individual office codes, each of these offices comprising a series of. lines assigned individual numbers, each of the long distance offices comprising an operator's switchboard provided with an associated internal junction and with a recording device, each of these offices comprising an automatic switching device, means which can be controlled from any calling line of any calling office of any calling network, to operate some of the said switching devices by <Desc / Clms Page number 51> view of routing a call from this line to the internal junction associated with the operator position of the long distance office of the calling network, each of the operator switch panels comprising an installation making it possible to answer a call on the associated interior trunk, and means controllable from any calling operator switchboard of any calling long distance office, for routing a call from the associated interior trunk to the associated recording device, and then to store therein a requested network code, a requested office code and a requested line number. 14. A long distance telephone interconnection system according to claim 13, in which each of said recording equipment comprises means responsive to the recording of a requested network code identifying a remote requested network, in order to actuate certain of them. these switching devices with a view to routing the call from them to a recording device of a long-distance office of a tandem network interposed in the path going to the remote requested network, and then to record this input. requested network code and this requested office code, as well as the number of the line requested in the recording equipment mentioned last, each of said recording apparatus comprising additional means responsive to the recording of a requested network code identifying a nearby requested network, for actuating other of said switching apparatus with a view to routing the call therefrom to the requested office of said nearby requested network, and from there to the requested line, connected to this office. 15 - Long distance telephone interconnection system in substance as described and as shown in the accompanying drawings, and for the purpose indicated.