GB960062A - Improvements in or relating to automatic telephone systems - Google Patents

Improvements in or relating to automatic telephone systems

Info

Publication number
GB960062A
GB960062A GB5713/61A GB571361A GB960062A GB 960062 A GB960062 A GB 960062A GB 5713/61 A GB5713/61 A GB 5713/61A GB 571361 A GB571361 A GB 571361A GB 960062 A GB960062 A GB 960062A
Authority
GB
United Kingdom
Prior art keywords
relay
idle
sets
tone
snr
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
GB5713/61A
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of GB960062A publication Critical patent/GB960062A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/0008—Selecting arrangements using relay selectors in the switching stages
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
  • Relay Circuits (AREA)
GB5713/61A 1960-02-15 1961-02-15 Improvements in or relating to automatic telephone systems Expired GB960062A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE149360 1960-02-15

Publications (1)

Publication Number Publication Date
GB960062A true GB960062A (en) 1964-06-10

Family

ID=20258279

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5713/61A Expired GB960062A (en) 1960-02-15 1961-02-15 Improvements in or relating to automatic telephone systems

Country Status (6)

Country Link
US (1) US3185771A (en:Method)
BE (1) BE600182A (en:Method)
DE (1) DE1137772B (en:Method)
FR (1) FR1280398A (en:Method)
GB (1) GB960062A (en:Method)
NL (1) NL261283A (en:Method)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2591580A (en) * 1948-10-29 1952-04-01 Bell Telephone Labor Inc Special trunk circuits for transmitting tones to calling subscribers
US2871297A (en) * 1954-03-08 1959-01-27 Itt 100-line direct-access crossbar telephone switching unit

Also Published As

Publication number Publication date
US3185771A (en) 1965-05-25
FR1280398A (fr) 1961-12-29
NL261283A (en:Method)
BE600182A (fr) 1961-05-29
DE1137772B (de) 1962-10-11

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