US2201573A - Telephone system - Google Patents

Telephone system Download PDF

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Publication number
US2201573A
US2201573A US240698A US24069838A US2201573A US 2201573 A US2201573 A US 2201573A US 240698 A US240698 A US 240698A US 24069838 A US24069838 A US 24069838A US 2201573 A US2201573 A US 2201573A
Authority
US
United States
Prior art keywords
relay
line
terminals
frame
relays
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US240698A
Other languages
English (en)
Inventor
Warren W Carpenter
Linus E Kittredge
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Bell Telephone Laboratories Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to NL68476D priority Critical patent/NL68476C/xx
Application filed by Bell Telephone Laboratories Inc filed Critical Bell Telephone Laboratories Inc
Priority to US240698A priority patent/US2201573A/en
Application granted granted Critical
Publication of US2201573A publication Critical patent/US2201573A/en
Priority to CH277164D priority patent/CH277164A/fr
Priority to FR951376D priority patent/FR951376A/fr
Priority to GB21768/47A priority patent/GB636920A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0004—Selecting arrangements using crossbar selectors in the switching stages

Definitions

  • the marker rst selects a set of terferred at the same time. s minals representing a group of twenty line num- 15 In accordance with the present invention, combers withinwhich the wanted line number lies. plete independence of the line number and the By this selection the marker determines the line location in the switching equipment is atnumber group frame on which the terminals of tained.
  • a set of the wanted number are mounted and by means of terminals for each line enteringvthe oiiice, sets of the number group connector selects a number 20 incoming terminals for the primary line switches frame land operates a hundred-block relayl and a and a set of terminals for each line number to twenty-block relay on that frame.
  • a set ,of three cirindividualizing one of the sets of number prouits for eachof the twenty numbers is extended 5 nals to one of said line terminals and. switch infrom the marker to twenty sets of threetermi- 25 coming terminals.
  • wanted line is yan individual line, a party line or v'from a consideration of the following description y one of a, group of lines leading to a private Vbranch in connection with the drawings in which: exchange and, if a partyA line, whether it isa tip 35 Fig. 1 SHOWS the equipment incoming t0 an or ring party. Furthermore, the-marker must Office and a number giOliD frame and conneCtOl; know whether the wanted lineA is busy or idle.
  • Fig. 2 shows parts of two line choices; Therefore, there is provided'on the number frame Fig.
  • FIG. 3 shows the registering equipment of the a block ofv control terminal strips representing 40 marker; and f line switch levels. Forty terminalstrips are pro- 40 Fig. 4 shows additional equipment in the vided, one for each level of the fourV frames in marker. any one choice.
  • ⁇ A second block of ⁇ terminals 'I'he present disclosure is a skeletonized showcombines the identification of the line choice'and ing of the terminating equipment of an office.
  • each switch unit comsince all of these lines are handledl in the same prises one hundred contact elements which promanner.
  • the second strip of eachset represents' 50 vide junctionsV between ten incoming elements tip party service and the third strip of each-set and ten outgoing elements.
  • the switches which represents a first or intermediate line of a private serve the subscribers lines are known as primary branch exchange trunk group.
  • This invention relates to telephone systems and has for its object increased flexibility in the determination of numbers and locations for subscribers lines.
  • ten levels of which are arranged vertically to constitute a frame, four frames comprising a line choice.
  • One subscribers line is connected to each of the incoming elements and, therefore, a choice may serve from 400 to 2800 lines,'the
  • 00 is extended by equipment, not shown, to an incoming junctor 0
  • the number of the wanted subscriber is then recorded on the terminating sender
  • the recorded designation is transferred to the marker and recorded on a set of registers represented by thousands relay 300, hundreds relay 30
  • indicates whether the hundreds digit is greater or less than 5 by operating relay 305 i'or digits greater than 5 and indicates the position of the digit in either series by operating one of iive relays. such as relay 300.
  • the thousands relay 300 marks one of ten conductors, such as conductor 300, which is extended to relay 301 or 300, according as relay 305 is or is not operated. Therefore, the joint operation of the thousands and hundreds register identiiies a group of 500 lines by operating one of a set of twenty relays, such as relays 301 and 300.
  • Theftens register represented by relay 302 discriminates between even and lodcl digits by operating relay 3
  • the units register relay 303 grounds one of ten conductors, which are extended to twenty conductors, according to the operated or non-operated condition of relay 3
  • Ihe joint operation of relay 300. and relay 301 or 300 selects a number group frame by completing a circuit i'or a marker preference relay, such as relay
  • a marker preference relay for each marker and these preference relays are arranged in a chain so that only one marker can attach itself to a-number group frame at a time.
  • 00 is operated as ⁇ soon as the frame is idle, operating a multicontact relay
  • 00 operated the hundred-block relay
  • each choice includes tour frames with ten levels on each frame, a set of twenty double wound relays 002 to 005 is provided.
  • Each pair of relays 002 and 003 or 000 and 005 represents one of the ten levels and each relay represents a pair of frames, the two windings of each relay distinguishing between the frames of the pair.
  • , etc. have three windings and are energized over the dinerent windings in accordance with the type of line. Therefore, there is a maximum of thirty conductors leading from the line choice relays and a maximum of forty conductors outgoing from the frame and level relays. 'I'hese conductors are extended in multiple to all of the number frame connector relays, such as relay
  • the operating conductors 000, 001 and 000 for relay 000 extend,
  • 'I'he subscriber's line 200 when it enters the omce. is connected toa distributing frame 20
  • the line itself is connected to the line terminals 203 and 200, while individual to the line terminals 203 and 200 are the sleeve or busy terminal 200 and the message register terminal 200.
  • terminal will be cross-connected over jumper
  • line 200 appears on the No. 0 level of the No. 0' frame in the No. 0 choice and is an individual message rate line.
  • termina1 I2 is connected over jumper
  • 3 is connected over jumper
  • the sleeve test circuit for line 200 extends from battery through the winding of relay 3
  • relay SII does not operate.
  • ground is connected under they control of the units register to conductor 3
  • Conductor 020 extends to terminal III, over jumper
  • the opera tion of relay 400 in this circuit identies the No. 0 line choice. I ground to the winding of relay4l3 ⁇ to ⁇ indicate that the wanted line is to be handled as an individual line.
  • ! extends to terminal II2, over jumper
  • Relay 402 in operating identifies the No'. 0 levelv and extends its operating ground over its inner left contact to the winding of relay 4I4l to'identify the No. 0 frame. It may be noted that relays 4I4 to 4I'I represent 'the four frames koi! a choice and are operated from the corresponding energizing circuit for each pair of relays.
  • the No. 0 line choice is selected by operating the marker preference relay 201, individual to the marker shown, in the No. 0 line choice connector.
  • the marker preference relay operates the multicontact relay 208 which extends all of the control circuits through to the choice.
  • the frame relay 4 I4 closes a circuit from ground through the winding of relay 4
  • Relay 4I8 operates if the frame equipment Vis idle and connects ground to the outer left contacts of the level relays 402, 404, etc., and, since relay 402 is assumed to be operated, operates horizontal level relay 2I0.
  • Relay 2I0 connects the operating circuits for the ten select magnets corresponding to the ten line junctors which serve the wanted line through to the marker where one will be selected as described in detail in the above-identied application of Dehn et al.
  • the hold magnet 2II of this line is operated over the front contact of relay 3I4 after an idle channel has .been selected.
  • terminal II3 would be crossconnected to strip I
  • I3 would be cross-connected to strip Il! which is connected to conductor 400.
  • Prior to the closure of the operating circuit for relay 3I4, relays 420 and 42
  • relay SIG and all similar relays included in the same private branch exchange group are operated so that the ilrst idle trunk of the group may be selected.
  • the corresponding relay in the group Relay 400 extends its operatingr the line isone of a group of branch exchange trunks.
  • the talking conductors are disconnected from the switch terminals 203 and 204 and transferred to terminals 2I2 and 2I3 at the desired location.
  • 24 is disconnected from terminal III on the number group frame and jumper
  • the message register is also disconnected from the message register terminal 200 of the first switch and connected to the message register terminal v2
  • causes the selection of the No. 9 line choice by operating the preference relay 2
  • Relay 405 causes the operation of frame relay 4I6 which selects the No. 2 frame in the choice, while relay 405 selectsthe No. 9 level on that frame.
  • a telephone system a plurality of lines, a plurality oi' switches in which said lines appear, said switches being arranged in levels, frames andl choices, control equipment common to said lines and to said switches, a cross-connecting rack.
  • sets oi terminals on said rack individual to directory numbers, means to individualize said sets ci' terminals to subscribers lines, means to register a directory number in said control equipment, means responsive to said registration to connect said control equipment withk the cross-connecting rack and the set of terminais individual to said number, means operated oversaidsotoiterminalstorecordtheidentity" oi' the choice, frame andlevel on which the corresponding line is located, and meansresponsive to said record i'or connecting said control equipment with said choice, frame and level i'or completing the connection with said line.
  • a cross-connecting rack setsy of terminals on said rack individual to directory numbers, means to individualize said sets oi terminals to subscribers lines, terminal strips on said rack for each choice,terminal strips on said rack for each irame level, means to'crossconnect said sets o! terminals with said terminal strips in accordance with the location ot ⁇ the line individualized thereto, ⁇ means to register a directory number in said control equipment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Interface Circuits In Exchanges (AREA)
US240698A 1938-11-16 1938-11-16 Telephone system Expired - Lifetime US2201573A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NL68476D NL68476C (en:Method) 1938-11-16
US240698A US2201573A (en) 1938-11-16 1938-11-16 Telephone system
CH277164D CH277164A (fr) 1938-11-16 1947-08-04 Dispositif de commutation pour établir, dans une installation téléphonique, une connexion avec une ligne désirée.
FR951376D FR951376A (fr) 1938-11-16 1947-08-06 Système téléphonique
GB21768/47A GB636920A (en) 1938-11-16 1947-08-07 Improvements in or relating to automatic telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US240698A US2201573A (en) 1938-11-16 1938-11-16 Telephone system

Publications (1)

Publication Number Publication Date
US2201573A true US2201573A (en) 1940-05-21

Family

ID=22907570

Family Applications (1)

Application Number Title Priority Date Filing Date
US240698A Expired - Lifetime US2201573A (en) 1938-11-16 1938-11-16 Telephone system

Country Status (5)

Country Link
US (1) US2201573A (en:Method)
CH (1) CH277164A (en:Method)
FR (1) FR951376A (en:Method)
GB (1) GB636920A (en:Method)
NL (1) NL68476C (en:Method)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504274A (en) * 1945-04-16 1950-04-18 Ericsson Telefon Ab L M System for automatic telephone exchanges with crossbar switches and private branch exchange trunk lines
US2574903A (en) * 1948-04-08 1951-11-13 Kellogg Switchboard & Supply Translator for shifted lines and parties
US2674657A (en) * 1949-04-04 1954-04-06 Itt Primary-secondary-spread crossbar telephone system
US2680781A (en) * 1949-11-08 1954-06-08 Bell Telephone Labor Inc Translating arrangement
US2710893A (en) * 1951-03-27 1955-06-14 Itt Automatic telephone system and translator therefor
US2928903A (en) * 1949-04-04 1960-03-15 Itt Switching system and translator therefor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2958209B1 (fr) 2010-04-01 2012-07-20 Oberthur Technologies Document de valeur, a couches de protection respectivement mate et brillante

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2504274A (en) * 1945-04-16 1950-04-18 Ericsson Telefon Ab L M System for automatic telephone exchanges with crossbar switches and private branch exchange trunk lines
US2574903A (en) * 1948-04-08 1951-11-13 Kellogg Switchboard & Supply Translator for shifted lines and parties
US2674657A (en) * 1949-04-04 1954-04-06 Itt Primary-secondary-spread crossbar telephone system
US2928903A (en) * 1949-04-04 1960-03-15 Itt Switching system and translator therefor
US2680781A (en) * 1949-11-08 1954-06-08 Bell Telephone Labor Inc Translating arrangement
US2710893A (en) * 1951-03-27 1955-06-14 Itt Automatic telephone system and translator therefor

Also Published As

Publication number Publication date
FR951376A (fr) 1949-10-24
NL68476C (en:Method)
CH277164A (fr) 1951-08-15
GB636920A (en) 1950-05-10

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