BE548588A - - Google Patents

Description

       

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   The present invention relates to automatic telephony systems of the type in which the requesting subscriber line can be identified and in which annotation elements determined in advance and relating to a call in progress can be recorded. More particularly, this invention relates to improvements to metered telephone service control apparatuses provided in call seekers of the type disclosed in US Pat. 2,289,896 granted to Bakker on July 14, 1942 and designed for use in such automatic telephone systems. Such a telephone system, to which the application of the present invention is contemplated, is described in detail in the related US patent application of Ivan V.

   Coleman, Serial No. 487,500, filed February 11, 1955. The aforesaid patent application describes a system with which the present invention is particularly compatible and, for this reason, reference is made to the related application in question with regard to this. description of the layout and mode of operation of the present invention.



   It is known to any technician in the branch that call seekers are provided in automatic telephone systems for the purpose of looking for a calling line when a call is initiated from a subscriber station and, after having found a requesting line that terminates on the finder pin bank, attack that requesting line and connect it to a free primary connector or selector in the switch train. In a conventional telephone system which uses call seekers, each of the subscriber lines terminates in an individual line circuit, each of these line circuits in turn terminating on the pin banks of the. call seekers.

   Normally, the subscriber lines which thus ultimately terminate at the pin banks of the call seekers are divided into two groups, each of these groups of lines being normally served by a predetermined group of line seekers, the the number of hunters in each group being determined by the traffic to be carried in each group of lines. Each of the groups of line seekers is assigned a set of group relays and a distributor, each of the call seekers in a group being controlled by this set of group relays and this distributor, each of the line circuits, which terminate a subscriber line in a subscriber line group, being also connected to the distributor and group relays assigned to that group.

   The distributor and the group relays perform the well-known function of assigning a free caller, part of the group of call hunters controlled by that distributor, to search for a call line. applicant subscriber.



  Each call searcher is individually assigned either a connector, as in the case in which the application of the present invention is envisaged, or a selector, so as to form a searcher-selector link.
In an automatic telephony system of the type described in the aforementioned related American application by Ivan V. Coleman, local calls, that is to say, calls intended for subscriber stations under the same central office than the outgoing subscriber station, are not handled in the same way as calls intended for subscriber stations belonging to remote exchanges.

   In the latter case, auxiliary equipment attached to the outgoing exchange is put into service with a view to detecting and identifying the calling subscriber, in order to record a sufficient number of data relating to a call in progress, so as to to charge the call appropriately, and to record this data for billing and accounting purposes. On the other hand, calls which take place exclusively between subscriber stations belonging to the same exchange do not require the intervention of this particular recording equipment, so that it remains inoperative.

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  However, it is necessary to provide means for recording the calls made by each subscriber station belonging to a local exchange, to subscriber stations belonging to the same local exchange. These recording means must in turn be rendered inoperative in the event that a call must be routed to a subscriber station belonging to a remote exchange, for which the aforementioned recording equipment is used. , this in order to avoid double recording of the call, which could lead to double invoicing.



   On the basis of the foregoing, the object of the present invention is to establish, in an automatic telephony system comprising means for carrying out a permanent recording of annotation elements relating to established calls, a new and improved system which applies to a call searcher, this system operating in such a way as to activate the means for recording the local calls emanating from the exchange in which the call is to be established and to render the call recording device inoperative local in the case of calls to be routed to remote centers determined in advance.



   Another object of the present invention is to establish, in an automatic telephone system comprising a first device for recording long-distance communications, intended to automatically record and annotate the annotation elements relating to calls for which charges long distance calls should be debited, as well as a second local recording device, intended to record local calls which are not subject to a long distance charge - an improved circuit system capable of making the said second recording device operational. local recording for calls established locally, in the original exchange, this circuit system acting on the other hand so as to render the said second local recording system ineffective,

   when the aforesaid first long distance registration system must be activated during calls established in remote exchanges.



   Another object of the present invention consists in establishing a new and improved switching system, intended for an automatic telephone system in which a detailed annotation is established of the calls routed to remote exchanges, this system of switching. switching operative, under the effect of calls for which no detailed annotation has been made, so as to connect, in said telephony system, a recording device in service, with a view to recording the mentioned calls finally.



   Another object of the present invention is to establish, in an automatic telephony system, an improved call searcher called to connect, in the latter system, an operating recording device, with a view to recording calls originating from. a local exchange and established in the same exchange.



   Other objects of the present invention relate to the arrangement of circuits and the mode of operation suitable for achieving the objectives and characteristics indicated above. The present invention - with regard to its general arrangement and its mode of operation, as well as its objects and characteristics indicated above - will be better understood by considering the following detailed description and that one will consider with reference to the accompanying drawings, in which:

   
Figures 1 and 2, taken together, show a telephone system incorporating the present invention, figure 1 being a schematic representation showing a line finder circuit, of general construction as described in the US patent Bak-

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 ker mentioned above; related devices comprising a distributor, a metering device and a subscriber station, as well as line equipment, have been symbolized by simplified diagrams, given that they are conventional organs, whose details are not essential for this presentation.



   Fig. 2 shows, also in the form of simplified diagrams, a part, sufficient for the complete description of the present invention, of the elements of an automatic telephony system of the type described in the aforementioned related US patent application by Coleman. Each simplified diagram shows a sufficient number of elements of the circuits forming part of the present invention, to allow an adequate description of the mode of operation. It should be noted that, both in figo 2 and in fig. 1, and whenever it was a question of facilitating comparison, the same reference numerals as in the aforementioned Coleman related application were used to designate identical elements and members, which are also found in this related application .



   With regard to the detailed description of the present invention, reference may be made to the above-mentioned Coleman application, with a view to making a more detailed description of the general arrangement and the mode of operation of the auxiliary and related equipment of which it is mentioned above and which will be described here only in general. In addition, with regard to the detection apparatus in question here, reference may be made to another related US patent application by Ivan V. Coleman,
Serial N 4870572, also filed February 11, 1955, where a more detailed description of this equipment can be found.



   Looking more particularly at the accompanying drawings, it can be seen that the telephone system shown therein comprises a central office where a series of subscriber lines terminate, including line 101 which also terminates at subscriber station A. In this exchange, a series of searcher-selector links are also provided, including the link formed by the call searcher 240 and the primary selector 300, these links being intended to establish connections between the various call lines. 'subscribers. Each call finder has access to 200 lines, these lines being arranged in a well-known manner, so as to form two groups of 100 lines each.

   Consequently, each of the links described above includes a 200 point call finder having access to each line of the system, as well as a 100 point selector, having access to the junctions going to other selectors. of the switch train. In addition, the links described here are arranged in two groups, also in a manner known per se, each of these link groups being provided with a distributor which is assigned to it individually and whose function consists in allocating free links making part of the related group, with a view to their use by the requesting lines.



   More specifically, the first link group comprises pager 240 and primary selector 300, as mentioned above, and is provided with a distributor and its associated group relays 242.



  Subscriber line groups and the line circuits assigned to them individually are assigned a distributor and group relays designed for this group. Thus, and as shown in fig. 1, the subscriber station A and its line 101 are connected, through the line circuit 205A of this line, to the distributor and to the group relays 242 common to the group of lines of which the line 101 is part. Line circuit 205A and distributor 242 are of conventional construction and operation and are described in detail in the Bakker patent referred to above.

   In addition, at each row of each

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 A and B subscriber counters are individually assigned which may be of conventional construction and mode of operation, these counters being used to record, for each subscriber station, the number of subscribers. local calls routed to subscriber stations under the local exchange.



   Continuing the general description of the telephone system, as shown in figs. 1 and 2, we will say that a local switching train - which includes the primary selector 300 referred to above and which is followed by a second selector X315, a third selector X320 and, finally, a connector X325 - constitutes the means by which a call can be routed from a subscriber station A to a local subscriber station belonging to the same exchange, these two stations being provided with lines which appear on the banks of the final connector, such as connector X325.

   In addition, a train of interconnection switches X310 is accessible, via an X305 pulse repeater, to the friction arms of the primary selector 300, with a view to routing calls initiated to subscriber stations, such as as station A, to stations belonging to remote exchanges, such as subscriber station B ', calls for which long distance charges should be debited.



   With regard to the latter calls, that is to say long-distance calls, to remote exchanges, a recording device is provided in the local exchange equipped with the equipment assigned to it and intended for it. in performing translation and routing functions, in order to control the primary selector 300 and the switching train which succeeds it, in order to allow the routing of a long distance call to its destination. In addition, the recorder-transmitter and detector apparatus controls the equipment associated with it, so as to identify a requested line and to establish a permanent state of the appropriate annotation details relating to the established long distance call.

   A detailed description of the general arrangement and mode of operation of the recorder-transmitter and associated equipment has been given in the two related Coleman applications referred to above. Figure 2 shows in the form of a simplified diagram, some of the constituent elements of the recorder-transmitter and of the equipment which is attached to it, and among which there are elements which affect the operation of the present invention and which exert a direct influence thereon. This figure shows the recorder-transmitter finder 250, which connects the selector 300 to a free recorder-transmitter, the part 2000 of which forming an annotator has also been shown.

   With the recorder-transmitter cooperate a detector 1900, a switch 1910 of this detector and a translator 2700.



   The call finder 240, shown in substantially detail in FIG. 1, comprises a 200 point Strowger type switching mechanism having a conventional pin bank and a row of pins 150 arranged vertically. The Strowger mechanism is furthermore provided with sets of upper and lower friction arms, comprising respectively the friction arms 121, 122 123 and 124, as well as 125, 126, 127 and 128, as well as a test or control 149, attached to the vertical row of pins 150.

   The Strowger mechanism also comprises an M170 ascension electro, intended to drive the aforesaid friction arms in the vertical direction, an M171 rotation electro, intended to drive the said friction arms in the direction of rotation, of same as an M172 release electro, to release the aforementioned friction arms and bring them back to their rest positions. Three sets of switching contacts S175, S176 and S179 are assigned to the Stranger mechanism,

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 actuated by the displacement of the aforesaid friction arms from their rest position, movement carried out in the vertical direction, as well as a set of switching contacts S174, which are actuated when the aforesaid friction arms arrive in an eleventh position of rotation.

   Considering fig. 1, it will further be noted that the sets of upper and lower friction arms respectively terminate conductors 131 and 132 which are operatively connected to the connecting conductors 133 which extend between the finder 240 and the primary selector 300. The finder 240 additionally includes R140 start relay, two R150 and R160 wiper arm switching relays, R180 counter lockout relay, R190 count relay, L128 monitoring lamp and S183 hand-operated lockout switch . A level starting and marking circuit 191, the role and mode of operation of which are substantially analogous to those of the circuit 191 shown and described in the Bakker patent, mentioned above, is also part of the researcher.



   The selectors 300, X315 and X320 also feature a classic Strowger 100 point type switching mechanism which has access to 100 junctions going to the following switches in the switching train, these switches being connected and arranged in the usual manner. The X325 connector also includes a classic Strowger mechanism, intended to connect a calling line to a called subscriber line that terminates on the pin banks of that connector, under the control of dial pulses transmitted from the calling subscriber station.



  The X 325 connector is fitted with means well known in the field of telephony and intended to reverse the polarity of the transmission current on the loop of the calling line, when the calling subscriber answers, by removing his handset from the fork - support . These latter means are not shown in the drawings, although the polarity reversal operation plays an important role in the description which follows and will be mentioned therein.



   The friction arms of the selector 300 also have access, through the contact pins of this selector, to the switchgear comprising an X305 repeater and an X310 switching train and intended to establish communications originating from subscriber stations belonging to the local exchange, such as station A, to subscriber stations belonging to remote exchanges, such as subscriber station B ', calls for which charges can be debited. long distance taxes.



   Each of the distributors, as well as the respective group relays assigned to it, are connected and arranged in a manner analogous to that of the distributor assembly and the group relays 242, which is assigned to group A of subscriber lines for the purposes of the present description. The distributor and group relay assembly 242 has a common arrangement and operates in a conventional manner; here also, only as many circuit elements have been shown as are necessary for a complete description of the present invention.

   Among the elements of distributor 242 is a rotary switch 241 having a pair of wiper arms each assigned to two banks of spindles, the arrangement being such that all of the remaining conductors which run from call finder 240 to distributor 242 are common to all call seekers in a group.



   The present invention will be better understood if we consider the details of its operation with regard to the routing of calls from subscriber lines under the local exchange, in which is also provided the improved call searcher according to present invention, intended for other subscriber lines. Since the operation of

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 the present invention relates only to the routing of calls between stations of subscribers coming under the aforesaid local exchange, as well as calls from these latter calling stations and to subscriber stations under remote exchanges. , these latter calls being those for which long distance charges must be debited, only these two types of calls will be considered below.

   A call which must be routed from subscriber station A shown in fig. 1 to the subscriber station B of FIG. 2 is initiated at station A in the usual way, by energizing a line relay, not shown, included in line circuit 205A. This line relay attracts in the manner known per se, by earthing the CN conductor, so as to mark the occupation of the requesting line on the banks of all the connectors on which the CN conductor is multiplied. .

   In addition, the line relay applies an earth, through the C190 conductor, to the pin of the vertical bench 150, pin which corresponds to the level assigned to the requesting line; on the other hand, this line relay applies a negative battery potential through the coil of the trip relay, also not shown, of the line circuit 205A to the contact pin C of the call finder, in order to mark the position of the requesting line in the level assigned to this last line.



  As the arrangement and operation of the level start and mark circuit 191 are well known, this circuit has been shown only symbolically in FIG. 1.



   The application of an earth potential, through the C190 conductor, to the contact pin of the vertical bank 150, as described above, further results in the application of an earth, by through starter conductor C110, to distributor 242, hence. This results in the establishment of an excitation circuit for the starter relay R131. When the start relay R131 is energized, it attracts in order to initiate the operation of the distributor 242, so that a pre-selected free call finder-selector link is assigned for use by the line d. 'applicant subscriber. It should be noted that in the description of the operation of the appropriate relays attached to the distributor
242, only the operations required for a brief description of this equipment will be taken into consideration.



   When the relay R131 attracts, it establishes by its pads 134 an excitation circuit for the relay R132. This last relay attracts and, through its 135 pads, applies an earth to the searcher starting conductor
C115, through the friction arm and the corresponding contact pin of the rotary switch 241, which conductor C115 leads to the finder circuit, as well as to the negative battery potential present therein, through of the start relay R140 of a pre-selected free call searcher, such as the R240 call searcher shown. The attraction of the relay R132 also has the effect of connecting, by means of pads not shown, the stepped control relay R133 to the intermittent-breaking conductor Cl14.

   The start relay R140 of the call finder is energized by the application, mentioned above, of an earth potential to the circuit which is established as follows: starting from the pads 135, passing through the contact arm 105 of the switch 241, the starting conductor C115, the coil of relay R140, to end at the negative pole of the battery. Relay R140 attracts and, by its pads 145, establishes an excitation circuit for the step by step control relay 133, a circuit which is established as follows: starting from the earth present on pads 173, passing through the pads 172, the pads 145, the intermittent cut-off conductor Cl14 and the coil of the relay R133 'to end at the negative pole of the battery.



   In addition, by its pins 143 and 144, relay R140 applies an earth potential, through the coils of test relays R136 and R137, and

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 test leads 0113 to test wiper arms 127 and 123 respectively, of call seeker 240.

   Furthermore, by its pads 141 the relay R140 prepares a point in an excitation circuit for the relay R138 and, by its pads 144 ', prepares a point in an excitation circuit for the ascension electro M170. Parses pads 149, the relay R140 prepares a point in a circuit for the excitation of the electro of rotation M171 and, by its pads
142, applies the negative battery potential to the positive line conductor C123, so as to cause the attraction of a conventional line relay, not shown, forming part of the primary selector 300. This battery potential is applied. by means of the upper resistor coil of relay R160 and, following the attraction, mentioned above, of the relay not shown of the selector, a preparatory attack of the selector 300, this in the manner usual.

   The top coil of relay R160 serves only as a suitable means of providing a non-inductive protective resistor. The preparatory attack is accomplished in this manner, rather than the well-known means of bypassing the negative and positive conductors in the call finder, in order to provide a basis for distinguishing between this preparatory attack and the subsequent attack on selector 300, which takes place after the calling line has been attacked by the caller. When this last attack takes place, the recorder-transmitter apparatus assigned to it carries out a leak test, the above system having the aim of preventing this test from taking place when the operation of the selector 300 is at the stage of. pre-attack.

   In addition, relay R140 transfers, through its pads 147 and 146 respectively, the upper coil forming part of the friction arm switching relay R150, from test conductor 0124 to test conductor C116 going to distributor 242; through its pads 148, relay R140 prepares a point in a circuit comprising the lower coil of the friction arm switching relay R160; by its pads 141 ', the relay R140 interrupts a point in a possible excitation circuit for the control electro M173, circuit starting from the earth present on the pads 179 of the lifting shaft springs S179, no actuated at this time;

   and, by its pins 143 'and 142' respectively, said relay R140 eliminates the earth of the blocking transfer relay R130 of the distributor 242 and applies an earth, through the intermediary of the conductor C128, to the conductor. C124 of junction line 133, in order to prepare the operation of the primary selector 300.

   Relay R130 is normally energized by circuits established in the free call seekers of a group of call seekers, these circuits being established as follows: from the earth present on pads 158 and 143 ' , passing through the pads 184 of the blocking switch 5183, the pads 175 'of the ascension shaft switch S175, the full occupancy conductor of the C121 junctions, the intermediate pads not shown, as well as the coil of the relay R130, to end at the negative pole of the battery.

   Relay R130 attracts appropriately with respect to call seeker 240 so as to maintain control circuits, not shown, in distributor 242, which circuits cause all call seekers to operate. calls forming part of the group assigned to distributor 242 will undergo the busy test before the call seekers of the associated group are subjected to such a test.



   After having been excited in the circuit indicated above, the relay R133 attracts and, by its pads 133 ', establishes an excitation circuit for the stepped ascent control electro M170, this last circuit being established as follows: from the earth present on an actuated contact, not shown and which is here irrelevant, and passing through the pads 133 ', the pads 138, the pads 140', the ascension conductor C120, the pads 144 'and the coils of the M170 ascension electro, to end at the negative pole of the battery. The electro M170 engages at this moment and acts

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 in a manner known per se, by lifting the wiper shaft or trolley of the Strowger mechanism 120 with one step, together with the wiper arms, including the vertical bench wiper arm 149.

   The excitation of electro M170 also has the effect that, by its pads 173, this electro cuts off the circuit established previously for the excitation of relay R133. Consequently, the latter relay drops out, thus opening, by its pads 133 ', the excitation circuit, indicated above, for the electro-ascension M170. Electro M170 falls again, closing the pads 173, following which the relay R133 attracts again, in the manner described above, so as to close the circuit indicated above, in view re-energize the M170 ascent electro- nic.

   The operation described above continues until the friction arm 149 of the vertical bench 150 meets, in the latter bench, the contact pin marked by the earth, at the intervention of the starting and level marking circuit. 191, through conductor C190, from the earth present on the attracted line relay pads, not shown, of line circuit 205A. When the friction arm 149 of the vertical bench encounters an earth potential, this potential is connected, as described above, by means of a coil of the relay R138, using the pads 141, the pads 139 ', of the pads 140', of the conductor C120 of the pads 144 'and of the coils of the ascension electro M170, at the negative pole of the battery.



  Relay R138 engages in series with the ascension electro M170 and, by its pads 138 ', closes a blocking circuit for itself through the coil of relay R139 and an actuated intermediate contact, not shown, circuit which ends in the battery, while, by its pads 138, this relay cuts a parallel earth leading to the ascension electro Ml70. The relay R139 is excited in an obvious circuit, and by closing by its pads 145 'a blocking circuit for itself and, by its pads 139', interrupts a point in the excitation circuit for the relay R138 and ascension electric M170, both of which trip.

   In addition, the attraction of the relay R139 has the effect that it transfers, by its pads 140 'and 146', respectively, the pulse emitting system, as controlled by the relay R133, from the ascending conductor C120 to the rotation conductor C118. When the M170 ascension electro triggers, it closes its pins 173 again which, as explained above, has the effect of re-establishing the excitation circuit for relay R133, which attracts at this moment, so as to prepare, by its pads 133 ′, an excitation circuit for the rotation electro M171.

   As soon as the shaft of the friction arms is caused to rise one step, as described above, the ascender shaft springs S176 close their pads 176, so as to establish a circuit for the coil. lower of the stop relay R180, this circuit being established as follows: starting from the earth present at the pads 158 and passing through the pads 142, the pads 176 and 193 and the lower coil of the relay R180, to end at the battery . Relay R180 does not attract at this time, since it is a high voltage relay, the attraction of which requires a higher voltage than that supplied by the normal 58 volt battery. central.



   The excitation circuit for the electro-rotation M171 can be established as follows: starting from the earth present at the group relay pads not shown and passing through the studs 133 ', the studs 138, the studs 146 ', 134', and 135 ', the rotation conductor C118. the pads 149, the pads 166, the pads 156 and the coils of the M171 rotation electro to end at the battery. The electro M171 attracts, so as to print a step, in the direction of the rotation, to the carriage 120 of the Strowger mechanism, in a manner well known per se. The electro M171 also attracts and, by its pads 172, cuts the excitation circuit, indicated above, for the intermittent failure relay R133.

   This last relay falls and, acting from the

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 as described above, opens the excitation circuit for the M171 rotation electro. The relay R133 and the rotation electro M171 cooperate, in the manner described above, with regard to the vertical movement of the carriage 120, to produce the stepwise rotation of the contact finder's contact arms, up to 'so that the test wiper arm 123 or 127 encounters a battery potential on a pin of the scanned pin level.

   In the call considered here, that is to say, a call originating from the group of lines
A, the wiper arm 123 encounters this battery potential, which is applied through the coil of a trip relay not shown, interposed in the line circuit 205A, the wiper arm 123, pins 144, the conductor 0113, a coil of relay R137, as well as intermediate circuit elements, not shown, to terminate in earth.



   The relay R137 attracts and, by its pins 136 'and 134', respectively, cuts the circuit described above of the electro of rotation M171 and closes a point in an excitation circuit for the switching relay. of friction arms R150. The electro M171 falls at this moment and, by its pads 172, re-establishes the excitation circuit, described above, for the intermittent cut-off relay R133, which relay attracts again, so as to close its pads 133 '. The excitation circuit for the switching relay R150 can be established as follows: starting from the earth present on the pads not shown, passing through the pads 133 ', the pads 138, the pads 146', the pads 136 ', the conductor C116, the pads 146, the pads 165 and the upper coil of the relay R150, to end at the battery.



   Relay R150 attracts and connects, on the one hand, through its pads 151 ', the counting conductor 0127 to the friction arm 124 and, on the other hand, through pads 151 and 152, the negative and positive line conductors C122 and 0123 going towards the selector 300, to the wiper arms 121 and 122. By its pads 153, the relay R150 connects the control conductor C124, going to the selector 300, to the wiper arm 123 and, by its pads 154, prepares a point in a blocking circuit intended for itself and comprising the control conductor C124 leading to the selector 300. In addition, by pulling, the relay R150 cuts by its pads 155 a point in the excitation circuit for the switching relay connected R160, while, by its pads 156, relay R150 cuts a point in the excitation circuit, indicated above, for the M171 rotation electro.

   At the same time that the pads 151 and 152 of relay R150 close the loop circuit going to the calling subscriber line, which has the effect of closing a circuit passing through the upper coil of the counting relay R190 and ending in the line relay (not shown) of selector 300, another circuit is closed by pads 157, this circuit comprising pads 183 and being intended for the lower coil of relay R190. The counting relay R190 does not attract at this time, however, since the current flowing through its upper coil and passing through the loop circuit is in opposition to the current flowing through its lower coil and circulating in the loop circuit. circuit described above.



   As the loop of the calling telephone set extends from call finder 240 to primary selector 300, the usual line relay control circuit, not shown, which circuit was previously established, in selector 300, in starting from the battery potential present on relay R160, as described above, is now established, starting from the earth, through the secondary coil of a transmission tone transformer and intermediate pads, not shown, then by the positive conductor C123 of the call finder 240 then, in the usual way, through the pulse pads of the dial of the calling telephone set, not shown, closed at this time, with return

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 via negative conductor C122 and relay R190 to the negative potential of the battery,

   present in the selector 300. A transmission tone is thus sent to the calling subscriber station, while, as a result of the attraction of the line relay, not shown, forming part of the selector 300, a ground is applied to the conductor of test that returns to call finder 240, in which earth is applied, through conductor C124, through pads 153, to wiper arm 123 and, therefore, to contact pin on which the friction arm 123 is stopped. This earth, coming from the selector 300, applied through the coil of a trip relay, not shown, interposed in the line circuit 205A, acts to determine the breaking of the circuit for the line relay, also not. shown, of line circuit 205A, circuit terminating at battery.

   The trip relay, not shown, operates in such a way as to cut the line relay circuit, also not shown, of the line circuit 205A, so that the latter relay drops out and, in a manner known per se, removes the earth from the circuit. C190 starter conductor, going to the level 191 starter and marking circuit. The dropout of the line relay also has the effect of connecting the normal and conventional test conductor, which goes to the connector banks, to the test conductor by the terminal from which earth is at this moment applied to the coil of the trip relay mentioned above. As a result of the last mentioned operation, earth is applied to the connector bank, so as to mark the occupation of the requesting line therein.

   The earth which, as described above, is applied from the selector 300, through the conductor C124, is also applied through the intersection of the pads 154, so as to establish a blocking circuit for switch relay R150, which has the effect of keeping call finder 240 operating as long as this ground is applied from selector 300 or other switches in the switching train. In addition, the earth described above, supplied by the selector 300, is applied by means of the ascension shaft springs S176 and their pads 176 to the lower coil R180, in order to reapply the tension thereon. earth which had been eliminated by the opening of the pads 158 following the attraction of the switching relay R150.

   The direct connection operation has now been carried out by the call seeker 240, and the distributor and group relay assembly 242 is now ready to intervene, in order to preselect another call seeker, d 'in a manner known per se. This operation, insofar as it concerns the operation of the call searcher in question here, will be described below.



   It should be noted that if the call came from one of the requesting lines accessible to the other '' set of wipers assigned to the call pager 240 in question, the wiper arm 127 would have encountered, during its rotation step by step, a battery potential, applied by the input of a conventional trip relay, potential which would have been transmitted, through the pads 143, of the conductor Cl12, of a coil from relay R136 and intermediate circuit elements, not shown, to ground.



  Relay R136 would have drawn in place of relay R137 and, by its pads 135 'and 137', would have, respectively, opened the circuit described above and intended for the electro of rotation Ml71, and closed a point in an excitation circuit for the second contactor switch relay R160. Relay R160, excited in a circuit establishing itself as follows starting from the earth present on the pads, not shown, passing through the pads 133 ', 138, 146', 134 ', 137', the conductor Cl17, the pads 148, 155 and the coil of this relay, to end up at the battery, would at that moment have performed the same switching operation as the relay R150.

   In addition, by its pads 168, the relay R160 would have prepared a point in a circuit for the illumination of the lower bench signal lamp L128, in addition to

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 assuming that this subscriber line is assigned to the lower bank of the Strowger 240 pager.



   It will be assumed that two line relays belonging to respective line circuits, such as the circuit designates 205A, are actuated, in which case the two friction arms 123 and 127 meet, in the same rotational position of the friction arms of mechanism 120, a battery potential as explained above. In this case, the two relays R136 and R137 energize. However, by its pads 134 ', the relay R137 cuts a point in the excitation circuit for the switching relay R160, and, by its pads
136 ', closes the excitation circuit for the switching relay R150, so that this relay, as well as the line terminating to the bank to which the relay R150 is assigned, will enjoy a preference for the switching. mutation.



   When earth is removed from the C190 starter conductor, the initial excitation circuit for relay R131 opens at the line relay pads, not shown, as described above. If no other call has been made from the group of lines to which distributor 242 is assigned, relay R131 drops.



   It should be noted here that, when either the switching relay R150 or the switching relay R1601, has actuated its pins 157 or 167, respectively, an earth is applied through the conductor C119 to the electro de. command M173, when relay R132 drops out in the manner described in the Bakker patent. Relay R132 drops out and, alongside other operations, performs, by means of its pins 135, the opening of the circuit for the starting relay R140 of call searcher 240. Relay R140 drops and, by its pads 142, eliminates the negative battery potential of the positive line conductor C123, so that the above mentioned leak test of the recorder-transmitter can be performed through the loop circuit, now established, of the subscriber line.

   By its 141te pads the R140 relay applies a parallel earth, through the actuated work pads 1799 to the guard conductor 0119, and cuts all the control circuits described above, which extend between the call finder 240 and the group 242 distributor and relay assembly.



   When the direct connection operation has been completed, in the case described here, by the switching relay R150, and the earth present at the pads 157 of this relay has been applied, through the protective conductor C119, to the control electro M173 and that the relay R132 has triggered, the latter electro engages, and cuts its own circuit by means of contacts with rhythmic or intermittent cuts, not shown, after which this electro triggers and, in this way, advances rotary switch 241 one step, as is well known in the art. In this way, the scrub arms 105 and 106 are brought to the contact pins assigned to the next call pager, analogous to the call pager 240.

   The guard conductor, such as the C119 conductor of the following call finder, is now connected, by means of the contact arm 106, to the control electro. M173, through the rhythmic breaking contacts, now closed, not shown, of this electro. If the next call seeker is busy, the friction arm 106 encounters a ground supplied to it with the aid of a conductor, such as conductor C119, from a stud of a relay. switching, for example pad 157 or 167.

   The electric control M173 switches on again and, at the same time, the relay R132 is short-circuited in a circuit not shown, in order to prevent this relay from pulling in the event that the relay R131 is actuated. by the fact that another user would try to make a call before the distributor 242 has met another free call seeker. This operation of the electro

 <Desc / Clms Page number 12>

 command M173 continues in a manner well known per se, until the rubbing arm 106 no longer encounters soil.



   When the primary selector 300 of the call searcher-selector link, which link the call searcher 240 is part of, is attacked, a certain number of operations result in the selector 300, prior to intervention. of this selector, under the control of the first series of dialing pulses, either those transmitted from the calling subscriber station, or under the control of the recorder-transmitter assigned to the selector 300 in the local exchange. These operations are described in detail in the related Coleman US Patent Application Serial No. 4870500 and need not be repeated here. Under the effect of these operations, the control conductor C124 is extended, through the primary selector 300 of fig. 2, up to conductor 305LS.

   The bonding control potential of the call finder 240 and line circuit 205A is then applied through the friction arm 251 of the transceiver finder 250, to the lead 272LS, so that it is introduced in the part 2000 forming an annotator, of the recorder-transmitter. At this point, parallel bonding earth is returned from the rest pads 2172 of relay R2170 to the coils of relays R150 (or Rl60) and to the lower coil of relay R180. Under the effect of the operations of the selector 300 mentioned above, the bonding earth which was initially supplied thereto is removed.



   When the calling subscriber under the local exchange hears the transmission tone sent from the primary selector 300, he can perform the usual maneuver consisting of dialing the number of the called local subscriber station B, and, under the control of Dial pulses formed, transmitted through the loop circuit of the line, the call is routed through the switching train, as is well known per se.

   It should be noted here that, in the case of a local call, the formation of the first three digits, which represent the identifier of the requested exchange, will have the effect that the equipment of the recorder-transmitter will act, at following the registration of the first three digits, so as to disconnect the transceiver from the primary selector 300, as described in detail in the related Coleman U.S. patent application Serial No. 487,500.

   When the called subscriber, holder of the called subscriber set B, responds by removing the handset from its fork-support, the well-known intervention of the X325 connector performs the function, also well known, of reversing the polarity of the signal potential. battery on the loop circuit of the line, which has the effect of reversing the direction of the current in the latter circuit. The counting relay R190, the upper coil of which is connected in series with the negative line conductor C122, attracts at this moment, since the passage of current in its upper coil and in its lower coil represents at this moment two flows of the same sense, whereas, prior to the reversal of the current, it represented opposite flows.

   By its pads 191, relay R190 closes an excitation circuit for a subscriber counter, such as subscriber counter A, assigned individually to each subscriber line. The subscriber counter, as used herein, is of conventional construction and is called upon to operate electromagnetically, in order to produce a record each time a call is established from a subscriber station under the control. local exchange, to another subscriber under the same local exchange.

   The circuit mentioned above is established as follows: from the earth present on the counter of subscriber A - given that the call was made from subscriber station A - via conductor C191 , the friction arm 124, the pads 151 ', the conductor C127, the pads 191, the conductor C126 and the lower resistance coil of the relay R150, for

 <Desc / Clms Page number 13>

 end at the negative pole of the battery. The subscriber A counter intervenes at this time to record the routing of the connection to the requested subscriber station. By its pads 193, the counting relay R190 interrupts a point in the excitation circuit for the relay R180, the intervention of which will not be necessary in this case.

   Until that moment, it was necessary that the relay R180 be ready to disable the metering system, in a manner which will be described later, in the event that another means of recording the metering system. call should be used. In addition, through its pads 192, relay R190 intervenes so as to establish a bypass circuit for its own upper coil, which coil is in series with line conductor C122, this circuit being intended to prevent any interference with it. the transmission of messages on the line, since the counting potential is applied during the duration of the communication.



   Before describing the release of the call seeker 240 following the release of the call, we will first consider the establishment of a connection routed through the interconnect switch train to an interconnecting switch train. subscriber station B '. When, after forming the part of the call number of the called subscriber station which represents the code, the recorder-transmitter has determined that the call being routed is justiciable. long-distance charge, this results in the initiation of a certain number of operations in the recorder-transmitter and in the equipment assigned to it.

   These operations are described in detail in the related Coleman patent applications, and only two operations and two system components will be considered here, which relate directly to the operation of the call finder subject to this discussion. invention.

   It will suffice to note that the recording, in the equipment of the recorder-transmitter, of the first three digits of a long-distance code will automatically have the effect of connecting a 2700 translator to the recorder-transmitter, so that a translation of the registered code which includes several routing digits, taken to be
 EMI13.1
 -registTéê dan'S: l11n, -egisteur1 de 'ohiffrés d làoheIÍlinemen.1ï, not shown, provided in -an accumulator, of code elements, also not shown, of the recorder-transmitter. , These routing digits will be used by the recorder-transmitter to route the call through. through the primary selector 300;

   in the appropriate direction, after which the transceiver, acting by means not shown, transmits all the digits registered by the calling subscriber, which are necessary to establish the connection through the repeater X305 and from the train of interconnection switches X310, to the called subscriber station B '.



  The translator 2700 is only called upon to intervene when the equipment of the recorder-transmitter has determined that a translation is necessary; on the other hand, the translator intervenes jointly with the transmitter recorder to which he is attached, in order to indicate to the call annotator 2000 of the recorder-transmitter equipment that the call in question, for which a translation has been required, is a long-distance call, which shall be the subject of annotation and, consequently, requires the use of a 1900 detector, in order to ascertain the call number of the calling station in question, which is participating in the telephone call.



   The 1900 detector is connected, by identification conductors forming part of the C460 cable, to each of the contact pins of the connector of each of the subscriber stations belonging to this exchange and is associated with the annotator. calls 2000 from the recorder-transmitter requestor equipment, using a detector switch 1910, as shown in fig. 2. In an actual installation, up to 200 different recorder-transmitters can be individually assigned to a common detector 1900 by means of the apparatus, not shown, provided in the detector switcher 1910.

 <Desc / Clms Page number 14>

 



   When determining whether or not the services of a detector 1900 are required, translator 2700, when terminated, actuates translation relay R2701, through a circuit not shown. This last relay acts, through one of its multiple contacts, so as to apply an earth, through intermediary elements, so as to apply an earth, through intermediate elements not shown, as well as from conductor C1801, to trunk relay AB (i.e., trunk traffic carried by the operating method with positions A and B) R2010 of annotator 2000 of the 'recorder-transmitter.



  The R2010 relay attracts, through its 2012 'pads, so as to be blocked to the earth in a circuit of which only the C05CR29 conductor has been shown, so that the R2010 relay remains in its attracted position, until that the recorder-transmitter assigned to it returns to the idle position. The attraction of the relay R2010 has the further effect that by its 2017 pads, this relay simultaneously applies a battery-resistance potential through the coil of the marginal detector test relay R2180, to the conductor C2027 going to the switch. detector 1910.

   When Detector Switcher 1910 has determined that Detector 1900 is available and can be assigned to the Recorder-Transmitter, various operations, which are irrelevant in this case, take place in order to effect. make this connection. Among the operations performed by the detector switch 1910 is the one which consists in applying an earth, by means not shown, to the conductor C2027 going to the call annotator 2000 and to the relay R2180, in the circuit which has been partially described above.



   The test relay R2180 is energized and determines a series of operations, including that which consists in establishing, by its pads 2184, an excitation circuit for the relay R2170. When relay R2170 attracts, it applies through its pads 2174 a positive battery potential of 90 volts to conductor 272LS, through resistor 2186; at the same time, said relay R2170 eliminates, through its pads 2172, the earth potential of conductor 272LS. A moment later, relay R2170 directly applies, through its 2173 pads, the positive battery potential of 90 volts to the 272LS conductor.



  The pads 2174 have been provided in order to insert the resistor 2186 into the circuit during the transition period between the opening of the pads 2172 and the closing of the pads 2173. It should be noted here that the direct guard earth - which starts from the pads 2172 and which is applied, through the input of a circuit described above, to the battery, through the coil of relay R150, in order to maintain the call finder 240 and the line circuit 205A in operation for the duration of the switching - is also applied, through the pads 153, the friction arm 123 and through the line circuits 205A, to the conductor CN, and then, through the input - connection of the C460 conductor, to the 1900 detector and, through the coil of an R410 relay, to the battery.

   However, the potential of the local battery is insufficient to actuate this last relay at this time.



   When the R2170 relay operates, through its 2173 pads, to substitute the positive battery potential of 90 volts for the direct earth potential, the R410 relay is given sufficient potential - as described in Coleman's related US patent application, Serial N 487.572- to initiate the detection function. The positive battery potential of 90 volts is also applied through studs 2173, lead 272LS, slider arm 251, lead 305LS, lead C124, studs 176 and 193, as well as through the lower coil. from the stop relay 180, to the negative pole of the battery.

   When the battery potential of 90 volts is added to the normal potential of the central battery, the relay R180 attracts and, through its pads 181, establishes a branch circuit which

 <Desc / Clms Page number 15>

 bypass the upper coil of counting relay R190; on the other hand, relay R180 opens via its pads 183 the circuit passing through the lower coil of relay R190. In this way, the operation of the counting relay R190 is effectively stopped as long as one of the contacts 181 or 183 is kept actuated, and the subscriber counter, which is controlled by the pads 191 of the relay R190, cannot perform no operation when the line loop polarity reversal occurs after the subscriber of set B 'has answered.

   The attraction of the stop relay R180 also has the effect of closing a blocking circuit for this relay, passing through the upper coil of the latter, this circuit starting from the earth present on the pins 157, and passing through pads 182 and the upper coil of relay R180, to end at the negative pole of the battery.



   After the detection and identification operation has been carried out by the detector 1900, the excitation circuit for the relay R2170 is interrupted by means not shown. When the latter relay drops out, the direct earth potential is again applied to the conductor.
272LS, in order to replace the positive battery potential of 90 volte-, following the return to rest of the pads 2172 and. 2173, respectively. Relay
R410 of detector 1900 returns to idle and determines the trigger of detector 1900.



   When the call, established to a subscriber station under the local exchange or a central office which is subject to long-distance charges, a call for which the establishment of the connection has been described above, is released, the hanging up the handset either at the calling subscriber station or at the called subscriber station opens the loop circuit of the line and initiates a series of conventional operations which ultimately result in the call. release of the primary selector 300;

     
When this occurs, the circuit from earth through the selector 300, as is known per se, is interrupted, and the earth potential is removed from the test lead C124, which has the effect of d '' remove the blocking earth from the contact pins of the connector, thus causing the opening of the excitation circuit for the switching relay R150, which relay drops out, as well as the opening of the circuit passing through the coil bottom of relay R180. At the same time, the excitation circuit for the trip relay, not shown, a relay interposed in the line circuit 205A, is also interrupted, so that this relay also drops out.

   When the switching relay R150 drops out, it opens via its pads 151 'a point in the excitation circuit for the subscriber counter A; its pads 151 and 152, respectively, it cuts the loop circuit of the line; by its pads 153, it interrupts a connection between the test conductor C124 and the wiper arm 123; through pads 157, it opens the blocking circuit for relay R180 and, through pads 154, it cuts its own control circuit. In addition, on falling, relay R150 closes by its pads 158 an excitation circuit for the release electro M172. This last circuit is established as follows: starting from the earth present on the pads 158, passing through the pads 143 ', the pads 184, the ascension shaft contacts 175, the pads 169 and the coil of electro M172, to end in the battery.



   The dropout of the release relay, not shown, interposed in the line circuit 205A, has the effect of reconnecting the line relay, also not shown, to the subscriber line. The electro-release M152 attracts and returns the shaft and the friction arms of the Strowger 120 mechanism to their rest position in a manner well known per se.

   When the Strowger 120 mechanism is returned to its home position in the ascending direction, the ascension shaft switches or contacts S175, S176

 <Desc / Clms Page number 16>

 and S179 return to rest, which has the effect of cutting, by the pads
175, of the circuit for the release electro 172, so that this electro triggers and, by its pads 175 ', applies a ground to the blocking transfer relay R130, in a circuit which is established as follows from the earth present on the pads 158, passing through the pads 143 ', the
184, pads 175 ', the full occupancy conductor of 0121 junctions, a pair of contacts, not shown, forming part of the distributor and group relay assembly 242 and the coil of relay R130, to terminate in the drums.

   Finally, the return to rest of the ascension shaft springs
S179 has the effect of eliminating, by the pads 179, the earth of the guard conductor 0119, thus marking the non-occupation of the call seeker 240 vis-à-vis the distributor and group relay assembly 242.



   When, following the tripping of the ascent shaft switch S176, the pins 176 open, one of the excitation circuits of the stop relay R180 is interrupted through the coil. lower part of this relay However, the latter circuit will already have been de-energized when the primary selector 300 is released and the earth is removed from the control conductor C124.

   Thus, in the case where the communication - about which we have described the release of the call searcher which results in the release of this communication - was established to a subscriber set which is subject to long-distance charges, the relay R180 drops out and, by its pads 182, cuts its blocking circuit which includes its upper coil and, by its pads 183, prepares a point in an excitation circuit described above, intended for the counting relay R190. In addition, on falling, relay R180 opens via its pads 181 the bypass circuit which bypasses counting relay R190.



   In the event that the release of caller 240 a. following the release of an established call to a subscriber station reporting to the local exchange, a call which was recorded speech counter of subscriber A, the counting relay R190 de-energizes when the pads 157 return to idle after the switching relay R150 has dropped, which will remove the earth from the circuit going to the battery and including the lower coil of relay R190. This last relay drops out and, by its pads 192, opens the bypass circuit which bypasses its upper coil, while, by its pads 193, it prepares a point in an excitation circuit for the stop relay R180.

   Call searcher 240 then returns to idle and is now available to search for a calling line when assigned by group distribution and relay assembly 242 for this purpose.



   Although the system described above is considered to be the most favorable embodiment and application of the present invention, it is understood that modifications can be made to the general layout and the design. elements and constituents of the circuit, without departing from the spirit of the present invention, nor going beyond the scope thereof.



   CLAIMS.

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


    

Claims (1)

1. - Telephone system characterized in that it comprises: a local exchange, requesting subscriber lines, connected to this local exchange; subscriber lines requested, connected to the aforementioned local exchange; a first switchgear provided in the aforementioned local exchange and intended to establish communications between a requested subscriber line and a requested subscriber line, both belonging to the local exchange in question; recording means individually assigned to each of the aforementioned requesting subscriber lines, for recording <Desc / Clms Page number 17> calls, the above recording means being actuated following the establishment of calls between the aforementioned requesting subscriber lines and the considered requested subscriber lines, connected to the aforementioned local exchange; other exchanges; of the subscriber lines requested from these other exchanges; a second switchgear, for establishing communications between a requesting subscriber line, belonging to the aforesaid local exchange and a requested subscriber line belonging to any of the other considered exchanges; means assigned to said first and second switchgear, for determining whether the calls in question should be established in the aforementioned local exchange or in any of the other aforementioned exchanges; and, means for rendering the above recording means inoperative, when the last mentioned means determine that the call in question must be established in one of the other exchanges above. 2. - Telephone system characterized in that it comprises a local exchange: calling subscriber lines coming under this local exchange; the subscriber lines requested coming under this local exchange; a first switching system, intended to establish communications between a requesting subscriber line and a requested subscriber line belonging to the aforementioned local center; central; subscriber lines requested in the other exchanges in question; second switching system, intended to establish communications between a calling line coming under this local exchange and a requested line coming under one of the other aforementioned exchanges; a first and a second call recording device; a discrimination system assigned to said first and second switching systems to distinguish between calls to subscriber lines under this local exchange and calls to subscriber lines under one of the other exchanges above, the first above-mentioned recording device being actuated - following the establishment of a call to a subscriber line belonging to this local exchange - so as to record the above-mentioned call; and, means for deactivating the aforementioned first call recording device, these deactivating means and said second recording device being actuated, respectively - by the fact that said discriminating device has determined that a call must be established to a subscriber line connected to one of the other centers in question - so as to put the aforementioned first call recording device out of effect and to record the call in question, intended for the aforementioned subscriber line belonging to one of the aforementioned other exchanges, in the aforementioned second call recording device. 3. - Telephone system characterized in that it comprises: a local exchange; requesting subscriber lines and requested subscriber lines, coming under this local exchange; a first switching system comprising a first selector for establishing communications between the aforementioned requesting subscriber lines and the aforesaid requested subscriber lines belonging to this local exchange; a recording device assigned individually to each of the requesting subscriber lines in question, this recording device being actuated - under the effect of the establishment of a call to a subscriber line coming under this local exchange - in a manner recording the call in question; other exchanges; of the subscriber lines requested, coming under these other exchanges; a second switching system which also comprises the first selector above, to establish communications between the aforementioned requesting subscriber lines and the aforementioned requested subscriber lines, coming under these other exchanges; a recorder-transmitter assigned to the above primary selector, to control this primary selector and the second above switching system; a detection device assigned to the recorder-transmitter in question, <Desc / Clms Page number 18> to detect and identify the aforementioned requesting subscriber lines; means assigned to the aforementioned recorder-transmitter for distinguishing between calls intended for subscriber lines under this local exchange and calls intended for subscriber lines under one of the other exchanges above; means for deactivating the recording device in question; and, means which, when the aforesaid discrimination device determines that a call is to be established in one of the above-mentioned exchanges, ensure the energization of the above detection device and of the deactivation device. aforementioned effect, which results, respectively, in detecting and identifying the requesting line in question and putting the aforesaid recording device out of effect. 40 - Telephone system characterized in that it comprises a local exchange; other exchanges; a calling subscriber line coming under this local exchange; of the subscriber lines requested coming under this local exchange and the other aforementioned exchanges; switchgear for establishing communications between the aforementioned requesting subscriber line and the aforesaid called subscriber lines; a recording device assigned to the requesting subscriber line in question, this recording device being normally actuated, following the establishment of a call to one of the above subscriber lines, so as to record this call; means assigned to the switching system in question and provided to establish the distinction between calls intended for subscriber lines under the aforesaid local exchange and calls intended for subscriber lines under the other exchanges above; a detection device assigned to the above switching system; and, means for deactivating the recording device considered, the arrangement being such that the aforementioned detection system and the above deactivation device are actuated - when the aforesaid discrimination device determines that the call in question must be established to requesting subscriber lines belonging to the other aforementioned exchanges - so as to detect and identify the requesting line in question and to put the above recording device out of effect. 5.- Telephone system characterized in that it comprises a local exchange; other exchanges; a calling subscriber line coming under this local exchange; a requested subscriber line belonging to this local exchange and a requested subscriber line belonging to one of the other aforementioned exchanges; a switchgear designed to establish a connection between the aforementioned requesting subscriber line and the aforementioned requested subscriber line, coming under this local exchange a second switching system, designed to establish a connection between the subscriber line requesting party above and the aforementioned requested subscriber line, belonging to said other exchange; recording device assigned to the aforementioned requesting line, the recording device in question being normally influenced by the fact that a call established to one of the subscriber lines referred to above is made. the subject of a response, so as to record this last call; discrimination means for determining the nature of a call to be established to one of the aforementioned requested subscriber lines, coming from one of the other aforementioned exchanges; deactivation means for rendering the above recording device inoperative, the aforementioned deactivation means being actuated - under the effect of the determination, by the above discrimination means, that 'a call to be established is intended for a requested subscriber line belonging to one of the other exchanges above - so as to deactivate the above recording device, which prevents the recording of the call in question. 6. - Telephone system characterized in that it comprises: a <Desc / Clms Page number 19> local central; other exchanges; a requesting subscriber line coming under this local exchange; a requested subscriber line belonging to this local exchange and a requested subscriber line belonging to one of the other aforementioned exchanges; switchgear comprising a call finder and intended to establish a connection between said requesting subscriber lines and one of said requested subscriber lines; a recording device assigned to the requesting subscriber line above, to record a call; a control device provided in the aforementioned call finder, to control the aforementioned recording device, the control device in question being normally actuated when a call routed to one of the subscriber lines referred to above has made the call. 'subject of a response; a disabling device provided in the call finder in question and intended to disable the aforementioned control device; means assigned to the aforesaid switchgear and called upon to discriminate between connections which must be established to the aforementioned subscriber line, coming under the aforementioned local exchange, and those which must be established to the aforementioned requested subscriber line, belonging to that of the other exchanges referred to above, said deactivation device being actuated, when the aforementioned discrimination system determines that a call which must be established is intended for one of the subscriber lines in question belonging to the central considered forming part of the other exchanges in question, so as to put the aforementioned control means out of effect, so that the actuation of the aforesaid recording system cannot take place. 7.- Telephone system characterized in that it comprises: a local exchange; a series of subscriber lines comprising a requesting subscriber line; under the aforementioned local exchange; other exchanges; a series of subscriber lines reporting to these other exchanges; a call finder having access to the aforementioned series of subscriber lines under the aforementioned local exchange; a series of recording devices individually assigned to the aforementioned series of subscriber lines under the aforesaid local center; means which, during the initiation of a call on said requesting subscriber line, are actuated so as to connect the aforementioned caller to the aforementioned requesting subscriber line; first additional switchgear, intended to establish a communication between the aforesaid calling subscriber line and a requested line belonging to the above series of subscriber lines coming under this local exchange; a second auxiliary switchgear, to establish a connection between the aforementioned requesting subscriber line and a requested line belonging to the above series of subscriber lines belonging to the aforementioned other exchanges; a system assigned or to said first switchgear and to the aforementioned second switchgear and intended to discriminate between a call which is to be established to a requested subscriber line belonging to the above local exchange, on the one hand, and a call to be established to a requested subscriber line belonging to the other aforementioned exchanges, on the other hand; means provided in the call finder above and intended to actuate one of the aforementioned recording devices, assigned to the requested subscriber line, these control means being energized, when a call to the destination of the requested line in question, forming part of said series of subscriber lines coming under the aforementioned local exchange, is answered, so as to record this call; a detection system assigned to the above first switchgear and to the aforementioned second switchgear, and intended to detect and identify the aforesaid requesting line; a disabling device provided for in the above, said line finder and intended to disable the aforementioned control means, with this that the aforementioned detection system and them <Desc / Clms Page number 20> the aforesaid disabling means are actuated respectively - when the aforementioned discrimination system determines that a connection, which is to be established, is intended for a requested subscriber line belonging to the other exchanges above - so in detecting and identifying the requesting subscriber line considered and in activating the disabling system in question, which has the effect of preventing said excitation of the aforementioned control devices and, consequently, the actuation of the aforesaid recording device. 8. - Telephone system characterized in that it comprises: a local exchange; a calling subscriber line coming under this local exchange; other exchanges; a requested subscriber line belonging to the above-mentioned local exchange and a requested subscriber line belonging to one of the other above-mentioned exchanges; a call searcher activated, under the effect of the formation of a call on the aforementioned called subscriber line, so as to find the requesting subscriber line considered; a first switchgear comprising the call pager in question and intended to establish a communication between said calling subscriber line and the aforementioned requested subscriber line belonging to the aforesaid local exchange; a second switchgear also comprising the above call finder and intended to establish a communication between the aforementioned requesting subscriber line and the aforesaid requested subscriber line belonging to the said exchange forming part of the other aforementioned exchanges; a counting device assigned to the aforementioned requesting subscriber line; means provided in said call finder and intended to actuate the aforementioned counting device, the above control means being normally energized - when a call appearing on the requested line called aforesaid, coming from the local exchange in question, answered - in order to measure the duration of this call; a detection system assigned to the above-mentioned first switchgear and to the above-mentioned second switchgear, to detect and identify the above requesting subscriber line; a disabling system intended to render said control means inoperative; a potential source for the excitation of the above-mentioned detection system and of the above-mentioned deactivation system; and, means for connecting the aforementioned source of potential to the aforesaid detection device and to the above deactivation system when the aforementioned connection which must be established is intended for the requesting subscriber line above, falling under the aforesaid exchange forming part of the other exchanges in question, so as to excite the detection system in question and the said deactivation means, so that the aforementioned requesting line is, respectively, detected and identified, while that the aforesaid control means are rendered inoperative, which has the result of preventing the counting of the above call appearing on the aforementioned subscriber line belonging to the aforesaid central being part of the other exchanges above. 9. - Telephone system characterized in that it comprises: a local exchange; other exchanges; a calling subscriber line coming under this local exchange; a requested subscriber line coming from the aforementioned local exchange and a requested subscriber line coming from one of the other exchanges above; switchgear comprising a line finder, for establishing connections between the aforementioned requesting subscriber line and the aforesaid called subscriber lines; counting device assigned to the aforementioned requesting subscriber line; an excitation circuit for said counting device; a first relay in the aforesaid line finder, to control the above excitation circuits; a prior excitation circuit for the first aforementioned relay; an excitation and control circuit for the above first relay, this circuit comprising the aforementioned switchgear, the excitation circuit <Desc / Clms Page number 21> above being established when a call is answered on the requested line called aforesaid relating to the local exchange in question, said prior excitation circuit and the aforementioned excitation and control circuit acting in conjunction, with a view to actuating the aforesaid first relay, so that the latter controls the excitation circuit of the aforementioned counting device, so as to actuate the aforesaid counting device, which has the effect of counting the said call; second relay provided in the aforementioned call finder and intended to put out of effect one of said excitation circuits for the first relay indicated above; a control circuit for the aforesaid second relay; a source of potential; and, means for connecting the aforementioned source of potential to the aforesaid control circuit, mentioned last, when a connection must be established to the above calling subscriber line, coming under the said central being part of the others. aforementioned central stations, so as to energize the second above-mentioned relay, so that the aforesaid excitation circuit forming part of the excitation circuits considered, intended for the first aforementioned relay, is put out of effect. so as to render the excitation circuit considered, intended for the above-mentioned counting device, out of effect. 10. A telephone system according to claim 9, characterized in that the aforementioned second relay is actuated so as to make operating the two said excitation circuits for the first relay above, so as to put out of operation. effect the above-mentioned excitation circuit of the above-mentioned counting device. He. - Telephone system characterized in that it comprises: a local exchange; calling subscriber lines in this local exchange; other exchanges; the requested subscriber lines belonging to this local exchange and the requested subscriber lines belonging to the other aforementioned exchanges; subscriber counters individually assigned to the above requesting subscriber lines; switchgear comprising a call pager and intended to establish communications between a requesting subscriber line and requested subscriber lines; means which, under the effect of the initiation of a call on one of the aforementioned requesting subscriber lines, connect the aforesaid call pager to the above requesting subscriber line and to the counter assigned to this one; a first circuit for energizing the above subscriber counter, which circuit extends to the above call finder; a first relay provided in said call finder and intended to control the aforementioned first circuit, so as to cause the excitation of the above subscriber counter; a prior activation circuit for the aforesaid first relay, energized when the call pager in question is connected to the requested subscriber line in question; excitation and control circuit for the above-mentioned first relay, this circuit comprising the aforesaid switching apparatus, the above excitation and control circuit being energized when a call occurring on a requested subscriber line, coming under the aforementioned local exchange, is answered, which has the effect of switching on both the aforementioned prior excitation circuit and the aforementioned circuit. excitation and control mentioned above, these two circuits acting jointly so as to actuate the first relay indicated above so that the latter controls the aforesaid first circuit, in such a way that the subscriber meter above is energized in such a way counting the aforementioned call established to the subscriber line requested above coming from the aforesaid local exchange; a second relay provided in the call finder in question and intended to deactivate the aforementioned preliminary excitation circuit and the aforementioned excitation and control circuit for the above first relay; and, a second circuit for controlling the aforementioned second relay, the aforesaid second circuit being energized following the initiation of an application. <Desc / Clms Page number 22> pel on the aforementioned calling subscriber line, to one of the aforementioned subscriber lines belonging to one of the aforementioned other exchanges, so as to put out of effect the two excitation circuits above. above for said first relay, in order to control, the above-mentioned first circuit, which results in preventing the excitation of the above subscriber meter. 12. - Telephone system characterized in that it comprises: a local exchange; calling subscriber line coming under this local exchange; other exchanges; a requested subscriber line belonging to this local exchange and a requested subscriber line belonging to one of the other aforementioned exchanges; a call recorder assigned to the aforementioned requesting line; a call finder; means actuated, under the effect of the initiation of a call on the requesting subscriber line above, so as to connect the aforementioned call searcher to the aforementioned requesting subscriber line and to the recording aforementioned call manager, which is assigned to him; first circuit for the excitation of the aforementioned call recorder, this circuit extending towards the aforementioned call finder; first switchgear comprising the aforementioned call searcher intended to establish a connection to the aforementioned requested subscriber line belonging to the local exchange in question; a second switchgear also comprising the aforementioned call pager and intended to establish a connection to the subscriber line requested above coming from the aforesaid exchange forming part of the other exchanges above; a first relay provided in the aforementioned call finder, intended to control the aforesaid first circuit, the said first relay comprising a first excitation coil interposed in the aforementioned line which goes towards a line of subscriber requested, as well as a second excitation coil; a circuit comprising the aforesaid second excitation coil and which is put under current under the effect of the aforesaid connection of the above-mentioned call finder to the above-mentioned requesting line, the arrangement being such that the said first excitation coil is normally energized via said line when the call is answered by a requested subscriber line, said excitation of the aforementioned first coil and said excitation of the aforementioned second coil acting jointly so as to actuate the aforesaid first relay, so that the latter controls the first circuit above, with the result that the recorder d the aforementioned calls is excited to record the above call intended for the aforesaid called subscriber; a second relay in the call finder in question, the second relay in question being able to be actuated in such a way as to make the said excitation circuits of this first relay inoperative; a second circuit for energizing the aforementioned second relay; means assigned to the aforesaid first switchgear and to the above second switchgear and provided for determining the nature of the calls which must be set up to the above subscriber line coming under the said exchange making part of the other above-mentioned centers; a detection system assigned to the aforesaid first switchgear and to the aforesaid second switchgear and intended to detect and identify said requesting subscriber line; a potential for excitement; and, means for applying the aforesaid excitation potential to the aforementioned second circuit and to the aforesaid detection system, when it is determined that a call in question should be routed to the requested subscriber line here. above, coming under said exchange forming part of the other aforementioned exchanges, this having the result of energizing the second circuit above, so as to actuate the second relay above, in order to make the circuits inoperative of the aforementioned first relay, so that the aforementioned excitation of the aforementioned call recorder is prevented, while the aforementioned detection system is energized, from so as to detect and identify the aforesaid requesting subscriber line. <Desc / Clms Page number 23> 13. - Telephone system characterized in that it comprises a requesting subscriber line and a series of requested subscriber lines; means for establishing connections between said requested subscriber line and one of said requested subscriber lines; a first counting device, for counting the calls which have given rise to connections established to lines determined in advance among the aforementioned requested subscriber lines; a second counter, to count the calls which have given rise to connections established to other lines determined in advance from among the subscriber lines requested above; means for discriminating between connections to destination between particular lines, among the aforesaid requested subscriber lines; means for producing the actuation of the first counting means, following the establishment of a connection to said lines determined in advance among the requested subscriber lines considered; a system for disabling the first counting device in question; the aforementioned second counting device and the aforesaid deactivation system being actuated - when the aforementioned discrimination system determines that a connection which must be established is intended for one of said other lines determined in advance among the subscriber lines referred to above - so as to control the second above-mentioned metering device, so that the latter in turn actuates the aforementioned deactivation device, which results in making inoperating the first counting device above. 14.- Call counting device for an automatic telephone system, this device being characterized in that it comprises a subscriber counter assigned to a requesting subscriber line; a call pager activated, following the initiation of a call on the aforementioned requesting subscriber line, so as to connect to the subscriber line requested above and to the counter d 'aforementioned subscriber; means provided in the above call finder and intended to produce normally the actuation of the aforesaid subscriber counter, when a call is answered at the called terminus; and, means provided in the call finder above and intended to put the aforementioned subscriber counter in effect when a call is made to called lines determined in advance. 15. - Device for detecting and counting calls, intended for an automatic telephone system, this device being characterized in that it comprises: a subscriber counter assigned to a calling subscriber line; a call searcher activated, following the formation of a call from the requesting subscriber line in question, so as to connect to said requesting subscriber line and to the subscriber counter above; means provided in the aforesaid call finder and intended to activate the aforementioned subscriber counter normally, when a call is answered by a requested line; a detection system provided for detecting and identifying the aforesaid requesting subscriber line; deactivation means provided in the aforesaid call finder and intended to render said actuation means of the subscriber counter inoperative; and, means for actuating said deactivation means and the above detection system following the formation of a call to a requested line determined in advance. 16. - Telephone system characterized in that it comprises a local exchange; subscriber lines which terminate at the aforementioned local exchange; a counter assigned individually to each of said lines; means for establishing local communications between a requested subscriber line and a requested subscriber line belonging to the aforementioned local exchange; means for activating the individual counter of the calling subscriber when <Desc / Clms Page number 24> the called local subscriber answers the call; other exchanges; the subscriber lines requested from these other exchanges; means for forming a long distance call from a calling subscriber line coming from the aforementioned local exchange, by transmitting the digits of the call number of a requested subscriber line coming from one of the aforementioned exchanges; a call recording device, intended to record the call number of the calling local subscriber; and, means which, following the above interurban call, render inoperative the aforesaid actuating means for the counter and actuate the control means of the call recorder so as to cause the recording of the call number of the aforementioned calling local subscriber, in order to debit long-distance charges. 17. - Telephony system characterized in that it comprises: a calling line, means controlled by the aforementioned calling line, so as to establish local connections and so as to establish interurban connections; a counter assigned individually to the requested line above; means for operating the above counter so that it registers established local calls; means for applying a special control potential to the aforementioned calling line, only in the event that this calling line is in the process of establishing a toll connection; a recording device for recording the telephone call number of the aforementioned calling line, with a view to establishing a long distance card, following the application of the aforementioned special control potential to the calling line aforesaid; and, a meter stop device, also controlled as a result of the above application of the aforesaid special control potential, for rendering said meter control means inoperative, thereby preventing the activation of the calling subscriber counter in the case of long distance calls. 18. - Telephone system characterized in that it comprises: local subscriber lines; a counter assigned individually to each of these local lines; remote subscriber lines; means controlled through requesting local subscriber lines, so as to establish local communications between the aforementioned local subscriber lines and to establish long-distance calls from the lines. - gnes of local subscribers requesting above and destined for the aforementioned remote subscriber lines; a response relay; a control circuit and a control coil of the aforementioned response relay, included in the established communications considered, both local and interurban; means for actuating the response relay in question through its control coil and the aforementioned control circuit, during the establishment of local communications between the aforementioned local subscriber lines and when the local subscriber requested answers the call; a counting circuit which closes, following the actuation of the aforementioned response relay, so as to actuate the counter of the calling subscriber, so that this counter registers the above local call; a counter stop relay; means for actuating the aforementioned meter stop relay, in the case of long distance communications established from the aforementioned local subscriber lines, to the aforementioned remote subscriber lines; and, contacts which close, following the actuation of the above stop relay, so as to bypass said control coil of the aforementioned response circuit, in order to prevent actuation. of the above answering relay, which in turn prevents actuation of the calling subscriber's meter in the case of established long distance calls. 19. - Telephone system characterized in that it comprises: a local exchange, local subscriber lines terminating at the aforesaid local exchange; other exchanges; of the requested subscriber lines ending in these <Desc / Clms Page number 25> other exchanges; means for establishing local calls from a local calling subscriber line, to local called subscriber lines, as well as for establishing long distance calls from the aforesaid local calling lines and to of the aforementioned requested lines, coming under the aforementioned other exchanges; a first recording device assigned individually to each local subscriber line, to record local calls between local subscriber lines coming under the above local exchange; a second recording device common to all the above-mentioned local subscriber lines, to record indications relating to long-distance calls, during long-distance communications between requesting local subscriber lines and the aforementioned requested lines falling under so-called other exchanges; means for actuating the aforementioned first recording device, individually assigned to the aforementioned requesting local subscriber line, when the requested local subscriber answers the call; and, means which - during the establishment of an interurban call originating from said calling local subscriber line and desti.- nation of a requested subscriber line belonging to one of said others central - act in such a way as to render inoperative the aotation means for the first recording device and to actuate the second above-mentioned recording device, so that the latter registers the indications allowing the establishment of a relative long-distance charge to the long distance call in question. 20. - Telephone system characterized in that it comprises: a calling line; a subscriber station connected to the aforementioned line and assigned an individual call number; means controlled from said station connected to the aforementioned calling line, and intended to establish local communications and interurban communications; a communications recorder individually assigned to the above calling station; these means for activating the aforementioned communications recorder, during communications established from the above calling subscriber station; a source of identification potential; means which, following the establishment of an interurban call, are controlled in such a way that they apply the aforementioned identification potential to the line requested above; means which, under the effect of the above-mentioned application of the above-mentioned identification potential, identify the call number of the above-mentioned calling station, connected to the above-mentioned requesting line; a recording device for recording the call number identified above of the aforementioned calling station connected to the aforesaid calling line, in order to establish a permanent recording of the call in question; and, a communications recorder stopping device, this stopping device also being actuated, during the aforesaid application of the identification potential in question to the requesting line considered, so as to render the means inoperative. the aforementioned actuation of the above communications recorder, in order to prevent the operation of this recorder during the establishment of the above long distance call.