GB525902A - Improvements in or relating to electrical signalling systems particularly for line or apparatus identification purposes - Google Patents

Improvements in or relating to electrical signalling systems particularly for line or apparatus identification purposes

Info

Publication number
GB525902A
GB525902A GB6905/39A GB690539A GB525902A GB 525902 A GB525902 A GB 525902A GB 6905/39 A GB6905/39 A GB 6905/39A GB 690539 A GB690539 A GB 690539A GB 525902 A GB525902 A GB 525902A
Authority
GB
United Kingdom
Prior art keywords
switch
relay
line
digits
exchange
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
Application number
GB6905/39A
Other languages
English (en)
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.)
Automatic Telephone and Electric Co Ltd
Original Assignee
Automatic Telephone and Electric Co Ltd
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
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to ES0149161A priority Critical patent/ES149161A1/es
Publication of GB525902A publication Critical patent/GB525902A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M15/00—Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
    • H04M15/08—Metering calls to called party, i.e. B-party charged for the communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
GB6905/39A 1939-03-02 1939-03-02 Improvements in or relating to electrical signalling systems particularly for line or apparatus identification purposes Expired GB525902A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
ES0149161A ES149161A1 (es) 1939-03-02 1940-03-01 Perfeccionamientos en sistemas eléctricos de senales

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB237887X 1939-03-02

Publications (1)

Publication Number Publication Date
GB525902A true GB525902A (en) 1940-09-06

Family

ID=41112512

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6905/39A Expired GB525902A (en) 1939-03-02 1939-03-02 Improvements in or relating to electrical signalling systems particularly for line or apparatus identification purposes

Country Status (6)

Country Link
US (1) US2286445A (en:Method)
BE (1) BE438173A (en:Method)
CH (1) CH237887A (en:Method)
DE (1) DE830531C (en:Method)
FR (1) FR872187A (en:Method)
GB (1) GB525902A (en:Method)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE465859A (en:Method) * 1945-06-13
BE473455A (en:Method) * 1946-07-25
US2532750A (en) * 1946-08-03 1950-12-05 Automatic Telephone & Elect Calling line identifier having display device at operator's position
US2570971A (en) * 1947-11-14 1951-10-09 Bell Telephone Labor Inc Vertical line number translator

Also Published As

Publication number Publication date
BE438173A (en:Method)
DE830531C (de) 1952-02-04
US2286445A (en) 1942-06-16
FR872187A (fr) 1942-06-01
CH237887A (fr) 1945-05-31

Similar Documents

Publication Publication Date Title
US2183649A (en) Automatic telephone system
US2291481A (en) Telephone system
GB525902A (en) Improvements in or relating to electrical signalling systems particularly for line or apparatus identification purposes
US2108140A (en) Telephone system
US1691410A (en) Automatic telephone system
US3046352A (en) Direct-access crossbar-switch connector system
US2411525A (en) Party line ringing system
US2252856A (en) Telephone system
US2699467A (en) Telephone system and a relayless line circuit and circuits in cooperation therewith for extending a call
US2621256A (en) Calling line identification apparatus
US2857472A (en) Call-distributing telephone system
US2106897A (en) Automatic or semiautomatic telephone system
US2458262A (en) Relay selector circuit arranged to simultaneously test a selected group of trunks
US2782260A (en) Ringing control circuit for telephone systems
US1568038A (en) Automatic telephone system
US2773126A (en) Automatic telephone system provided with party lines and trunk lines
US2986604A (en) Dial telephone office arranged for register-sender control of two-motion step-by-step switches having multilevel trunk groups
US2532750A (en) Calling line identifier having display device at operator's position
US1862537A (en) Time measuring device
US2885480A (en) Relay register
US2707725A (en) Reverting call system
US1935910A (en) Telephone system
US2897277A (en) Zone prohibiting circuit
US1880722A (en) Call distributing system for concentration circuits
US2751434A (en) Automatic telephone systems provided with party lines