BE871481A - Circuit detecteur de signaux annonciateurs a courant alternatif - Google Patents

Circuit detecteur de signaux annonciateurs a courant alternatif

Info

Publication number
BE871481A
BE871481A BE2057365A BE2057365A BE871481A BE 871481 A BE871481 A BE 871481A BE 2057365 A BE2057365 A BE 2057365A BE 2057365 A BE2057365 A BE 2057365A BE 871481 A BE871481 A BE 871481A
Authority
BE
Belgium
Prior art keywords
detector circuit
signal detector
alternative current
announcement signal
current announcement
Prior art date
Application number
BE2057365A
Other languages
English (en)
Inventor
D Q Lee
R M Rovnyak
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 BE871481A publication Critical patent/BE871481A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/442—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies
    • H04Q1/4423—Signalling arrangements; Manipulation of signalling currents using alternate current with out-of-voice band signalling frequencies using one signalling frequency
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
BE2057365A 1977-12-23 1978-10-24 Circuit detecteur de signaux annonciateurs a courant alternatif BE871481A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/864,051 US4133982A (en) 1977-12-23 1977-12-23 AC supervisory signal detector circuit

Publications (1)

Publication Number Publication Date
BE871481A true BE871481A (fr) 1979-02-15

Family

ID=25342417

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2057365A BE871481A (fr) 1977-12-23 1978-10-24 Circuit detecteur de signaux annonciateurs a courant alternatif

Country Status (4)

Country Link
US (1) US4133982A (fr)
BE (1) BE871481A (fr)
CA (1) CA1111585A (fr)
IT (1) IT1101310B (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4190745A (en) * 1978-12-01 1980-02-26 Gte Automatic Electric Laboratories Incorporated Call for service and continuity sensor circuit
CH649183A5 (de) * 1980-03-27 1985-04-30 Siemens Ag Albis Signalisierverfahren fuer fernmelde-, insbesondere fernsprechvermittlungsanlagen.
US4311879A (en) * 1980-06-02 1982-01-19 Gte Automatic Electric Labs Inc. AC Supervisory signal detector circuit
US4584441A (en) * 1984-09-07 1986-04-22 At&T Bell Laboratories Bidirectional adaptive voice frequency repeater
WO1988006386A1 (fr) * 1985-04-08 1988-08-25 Rapitech Systems Inc. Coupleur de reseau telephonique
US4727535A (en) * 1985-04-08 1988-02-23 Rapitech System Inc. Telephone network coupler
US6480596B1 (en) 1993-05-07 2002-11-12 Samsung Electronics Co., Ltd. Direct inward-outward dialing trunk circuit
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
TWI757769B (zh) * 2020-06-22 2022-03-11 國立虎尾科技大學 訊號偵測器、訊號轉換器、電源控制器與訊號轉換方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3766325A (en) * 1971-09-13 1973-10-16 Lordel Mfg Co Control circuits for key telephone system
US3842216A (en) * 1972-08-07 1974-10-15 Ford Ind Inc Frequency-selective ringing current sensor for telephone line
US3875346A (en) * 1974-02-25 1975-04-01 Communic Mfg Revertive pulsing
US4004106A (en) * 1975-06-25 1977-01-18 Akzona Incorporated Line circuit for use with a key telephone system
US4046970A (en) * 1976-04-12 1977-09-06 Magnetic Controls Company Ringing detector for telephone circuits

Also Published As

Publication number Publication date
IT7830866A0 (it) 1978-12-15
IT1101310B (it) 1985-09-28
CA1111585A (fr) 1981-10-27
US4133982A (en) 1979-01-09

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: GTE AUTOMATIC ELECTRIC LABORATORIES INC.

Effective date: 19871031