GB537050A - Improvements in or relating to line identification for telephone systems - Google Patents

Improvements in or relating to line identification for telephone systems

Info

Publication number
GB537050A
GB537050A GB210/40A GB21040A GB537050A GB 537050 A GB537050 A GB 537050A GB 210/40 A GB210/40 A GB 210/40A GB 21040 A GB21040 A GB 21040A GB 537050 A GB537050 A GB 537050A
Authority
GB
United Kingdom
Prior art keywords
relay
relays
switch
key
digits
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
GB210/40A
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
Priority to BE464870D priority Critical patent/BE464870A/xx
Application filed by Automatic Telephone and Electric Co Ltd filed Critical Automatic Telephone and Electric Co Ltd
Priority to GB210/40A priority patent/GB537050A/en
Priority to US370362A priority patent/US2318267A/en
Publication of GB537050A publication Critical patent/GB537050A/en
Priority to FR932148D priority patent/FR932148A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/60—Semi-automatic systems, i.e. in which the numerical selection of the outgoing line is under the control of an operator
    • H04M3/64—Arrangements for signalling the number or class of the calling line to the operator
    • 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)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
GB210/40A 1940-01-04 1940-01-04 Improvements in or relating to line identification for telephone systems Expired GB537050A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BE464870D BE464870A (enrdf_load_stackoverflow) 1940-01-04
GB210/40A GB537050A (en) 1940-01-04 1940-01-04 Improvements in or relating to line identification for telephone systems
US370362A US2318267A (en) 1940-01-04 1940-12-16 Telephone line identification
FR932148D FR932148A (fr) 1940-01-04 1946-08-10 Perfectionnements concernant l'identification de lignes pour des systèmes téléphoniques

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB210/40A GB537050A (en) 1940-01-04 1940-01-04 Improvements in or relating to line identification for telephone systems

Publications (1)

Publication Number Publication Date
GB537050A true GB537050A (en) 1941-06-06

Family

ID=9700338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB210/40A Expired GB537050A (en) 1940-01-04 1940-01-04 Improvements in or relating to line identification for telephone systems

Country Status (4)

Country Link
US (1) US2318267A (enrdf_load_stackoverflow)
BE (1) BE464870A (enrdf_load_stackoverflow)
FR (1) FR932148A (enrdf_load_stackoverflow)
GB (1) GB537050A (enrdf_load_stackoverflow)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2499776A (en) * 1946-05-27 1950-03-07 Teletype Corp Audible telephonic line identification
US3536839A (en) * 1968-10-11 1970-10-27 Bell Telephone Labor Inc Answer tone detection circuit

Also Published As

Publication number Publication date
BE464870A (enrdf_load_stackoverflow)
US2318267A (en) 1943-05-04
FR932148A (fr) 1948-03-12

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