GB810875A - Improvements in telephone systems - Google Patents

Improvements in telephone systems

Info

Publication number
GB810875A
GB810875A GB20859/56A GB2085956A GB810875A GB 810875 A GB810875 A GB 810875A GB 20859/56 A GB20859/56 A GB 20859/56A GB 2085956 A GB2085956 A GB 2085956A GB 810875 A GB810875 A GB 810875A
Authority
GB
United Kingdom
Prior art keywords
july
memory
register
telephone systems
information
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
GB20859/56A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Publication of GB810875A publication Critical patent/GB810875A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/08—Indicating faults in circuits or apparatus

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
GB20859/56A 1955-07-05 1956-07-05 Improvements in telephone systems Expired GB810875A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1130220T 1955-07-05

Publications (1)

Publication Number Publication Date
GB810875A true GB810875A (en) 1959-03-25

Family

ID=9637299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20859/56A Expired GB810875A (en) 1955-07-05 1956-07-05 Improvements in telephone systems

Country Status (5)

Country Link
US (1) US2878328A (enExample)
BE (1) BE551031A (enExample)
CH (1) CH343465A (enExample)
FR (1) FR1130220A (enExample)
GB (1) GB810875A (enExample)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3159721A (en) * 1960-07-13 1964-12-01 Bell Telephone Labor Inc Outgoing trunk identification circuit
DE1236600B (de) * 1965-07-17 1967-03-16 Standard Elek K Lorenz Ag Verfahren und Schaltungsanordnung zur UEberwachung des Verbindungsaufbaues in einer durch Markierer zentral gesteuerten Koppelanordnung
DE1301842B (de) * 1966-04-29 1969-08-28 Siemens Ag Verfahren fuer Fernmelde-, insbesondere Fernsprechanlagen mit Wegedatenspeicherung
US3808380A (en) * 1973-01-08 1974-04-30 Western Electric Co Identifier arrangement
FR2235560B1 (enExample) * 1973-06-28 1978-08-04 Sarric Serge

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2202921A (en) * 1938-11-05 1940-06-04 Bell Telephone Labor Inc Trouble recorder
US2364796A (en) * 1942-03-27 1944-12-12 Bell Telephone Labor Inc Trouble indicating system
US2383770A (en) * 1942-11-07 1945-08-28 American Telephone & Telegraph Electrical measuring system
US2392090A (en) * 1943-02-20 1946-01-01 Bell Telephone Labor Inc Busy test system

Also Published As

Publication number Publication date
FR1130220A (fr) 1957-02-01
US2878328A (en) 1959-03-17
CH343465A (fr) 1959-12-31
BE551031A (enExample)

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