GB979526A - Telephone switching systems - Google Patents

Telephone switching systems

Info

Publication number
GB979526A
GB979526A GB25222/61A GB2522261A GB979526A GB 979526 A GB979526 A GB 979526A GB 25222/61 A GB25222/61 A GB 25222/61A GB 2522261 A GB2522261 A GB 2522261A GB 979526 A GB979526 A GB 979526A
Authority
GB
United Kingdom
Prior art keywords
sender
trunk
outgoing
outgoing trunk
trouble
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
GB25222/61A
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.)
AT&T Corp
Original Assignee
Western Electric Co 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
Application filed by Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB979526A publication Critical patent/GB979526A/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)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Exchange Systems With Centralized Control (AREA)
GB25222/61A 1960-07-13 1961-07-12 Telephone switching systems Expired GB979526A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42684A US3159721A (en) 1960-07-13 1960-07-13 Outgoing trunk identification circuit

Publications (1)

Publication Number Publication Date
GB979526A true GB979526A (en) 1965-01-06

Family

ID=21923225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB25222/61A Expired GB979526A (en) 1960-07-13 1961-07-12 Telephone switching systems

Country Status (6)

Country Link
US (1) US3159721A (enExample)
JP (1) JPS399967B1 (enExample)
BE (1) BE605996A (enExample)
DE (1) DE1242717B (enExample)
GB (1) GB979526A (enExample)
SE (1) SE310717B (enExample)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299220A (en) * 1963-05-08 1967-01-17 Automatic Elect Lab Programmed diagnostic equipment for a communication switching system
US3808380A (en) * 1973-01-08 1974-04-30 Western Electric Co Identifier arrangement

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2868884A (en) * 1952-05-06 1959-01-13 Bell Telephone Labor Inc Toll switching telephone system
BE527157A (enExample) * 1953-03-12
NL193626A (enExample) * 1953-12-30
US2820099A (en) * 1954-09-14 1958-01-14 Bell Telephone Labor Inc Trouble recording on time-out circuit for automatic telephone
BE551031A (enExample) * 1955-07-05
DE1015862B (de) * 1956-08-17 1957-09-19 Standard Elektrik Ag Kennzeichnungseinrichtung fuer Fernmelde-, insbesondere Fernsprechanlagen

Also Published As

Publication number Publication date
SE310717B (enExample) 1969-05-12
US3159721A (en) 1964-12-01
BE605996A (fr) 1961-11-03
JPS399967B1 (enExample) 1964-06-09
DE1242717B (de) 1967-06-22

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