IT1136751B - Circuito rivelatore di segnalidi supervisione alternati - Google Patents

Circuito rivelatore di segnalidi supervisione alternati

Info

Publication number
IT1136751B
IT1136751B IT21925/81A IT2192581A IT1136751B IT 1136751 B IT1136751 B IT 1136751B IT 21925/81 A IT21925/81 A IT 21925/81A IT 2192581 A IT2192581 A IT 2192581A IT 1136751 B IT1136751 B IT 1136751B
Authority
IT
Italy
Prior art keywords
alternate
detector circuit
signal detector
supervision signal
supervision
Prior art date
Application number
IT21925/81A
Other languages
English (en)
Other versions
IT8121925A0 (it
Inventor
Douglas J Brush
Original Assignee
Gte Automatic Electric Lab 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 Gte Automatic Electric Lab Inc filed Critical Gte Automatic Electric Lab Inc
Publication of IT8121925A0 publication Critical patent/IT8121925A0/it
Application granted granted Critical
Publication of IT1136751B publication Critical patent/IT1136751B/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M7/00—Arrangements for interconnection between switching centres
    • H04M7/0096—Trunk circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
IT21925/81A 1980-06-02 1981-05-25 Circuito rivelatore di segnalidi supervisione alternati IT1136751B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/155,700 US4311879A (en) 1980-06-02 1980-06-02 AC Supervisory signal detector circuit

Publications (2)

Publication Number Publication Date
IT8121925A0 IT8121925A0 (it) 1981-05-25
IT1136751B true IT1136751B (it) 1986-09-03

Family

ID=22556447

Family Applications (1)

Application Number Title Priority Date Filing Date
IT21925/81A IT1136751B (it) 1980-06-02 1981-05-25 Circuito rivelatore di segnalidi supervisione alternati

Country Status (4)

Country Link
US (1) US4311879A (it)
BE (1) BE887059A (it)
CA (1) CA1160779A (it)
IT (1) IT1136751B (it)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5259022A (en) * 1991-01-07 1993-11-02 Thomson Consumer Electronics, Inc. Detector for use with an automatic disconnect feature in a telephone answering machine
EP0651541B1 (en) * 1993-10-29 2001-01-10 STMicroelectronics S.r.l. Telephone subscriber circuit with galvanic isolating element for driving the on/off states of a telephone line
JP2002535887A (ja) * 1999-01-15 2002-10-22 インフィネオン テヒノロギーズ アーゲー 遠隔通信網の信号発信回路構成

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317831A1 (fr) * 1975-07-11 1977-02-04 Trt Telecom Radio Electr Detecteur de courant d'appel telephonique
US4066848A (en) * 1976-09-07 1978-01-03 T.A.D. Telephone ring detector circuit
JPS5399702A (en) * 1977-02-12 1978-08-31 Iwatsu Electric Co Ltd Call signal detector circuit
US4133982A (en) * 1977-12-23 1979-01-09 Gte Automatic Electric Laboratories Incorporated AC supervisory signal detector circuit
US4190745A (en) * 1978-12-01 1980-02-26 Gte Automatic Electric Laboratories Incorporated Call for service and continuity sensor circuit

Also Published As

Publication number Publication date
US4311879A (en) 1982-01-19
BE887059A (fr) 1981-05-04
CA1160779A (en) 1984-01-17
IT8121925A0 (it) 1981-05-25

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