BE887059A - Montage detecteur de signaux annonciateurs du type courant alternatif - Google Patents

Montage detecteur de signaux annonciateurs du type courant alternatif

Info

Publication number
BE887059A
BE887059A BE2/58950A BE2058950A BE887059A BE 887059 A BE887059 A BE 887059A BE 2/58950 A BE2/58950 A BE 2/58950A BE 2058950 A BE2058950 A BE 2058950A BE 887059 A BE887059 A BE 887059A
Authority
BE
Belgium
Prior art keywords
mounting
alternating current
current type
signal sensor
announcing signal
Prior art date
Application number
BE2/58950A
Other languages
English (en)
Inventor
D 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 BE887059A publication Critical patent/BE887059A/fr

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)
BE2/58950A 1980-06-02 1981-01-14 Montage detecteur de signaux annonciateurs du type courant alternatif BE887059A (fr)

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 (1)

Publication Number Publication Date
BE887059A true BE887059A (fr) 1981-05-04

Family

ID=22556447

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2/58950A BE887059A (fr) 1980-06-02 1981-01-14 Montage detecteur de signaux annonciateurs du type courant alternatif

Country Status (4)

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

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
DE69329859T2 (de) * 1993-10-29 2001-06-07 Stmicroelectronics S.R.L., Agrate Brianza Fernsprech-Teilnehmerschaltung mit einem galvanischen Trennungselement zur Erzeugung der An/Aus Zustände einer Fernsprechleitung
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
CA1160779A (fr) 1984-01-17
US4311879A (en) 1982-01-19
IT1136751B (it) 1986-09-03
IT8121925A0 (it) 1981-05-25

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: GTE AUTOMATIC ELECTRIC LABORATORIES INC.

Effective date: 19900131