BE846034A - SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE COMMUNICATION SYSTEMS - Google Patents

SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE COMMUNICATION SYSTEMS

Info

Publication number
BE846034A
BE846034A BE2055296A BE2055296A BE846034A BE 846034 A BE846034 A BE 846034A BE 2055296 A BE2055296 A BE 2055296A BE 2055296 A BE2055296 A BE 2055296A BE 846034 A BE846034 A BE 846034A
Authority
BE
Belgium
Prior art keywords
detection circuit
communication systems
subscriber line
telephone communication
status detection
Prior art date
Application number
BE2055296A
Other languages
French (fr)
Inventor
G Fink
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 filed Critical
Publication of BE846034A publication Critical patent/BE846034A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/22—Arrangements for supervision, monitoring or testing
    • H04M3/2272—Subscriber line supervision circuits, e.g. call detection circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H04M19/026—Arrangements for interrupting the ringing current

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
BE2055296A 1975-09-13 1976-09-10 SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE COMMUNICATION SYSTEMS BE846034A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752540973 DE2540973C2 (en) 1975-09-13 1975-09-13 Circuit arrangement for recognizing the operating status of a subscriber line and for connecting calls in telephone exchanges

Publications (1)

Publication Number Publication Date
BE846034A true BE846034A (en) 1977-03-10

Family

ID=5956449

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2055296A BE846034A (en) 1975-09-13 1976-09-10 SUBSCRIBER LINE STATUS DETECTION CIRCUIT IN TELEPHONE COMMUNICATION SYSTEMS

Country Status (3)

Country Link
BE (1) BE846034A (en)
DE (1) DE2540973C2 (en)
FR (1) FR2324183A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394944A1 (en) * 1977-06-17 1979-01-12 Labo Cent Telecommunicat CALLER ISOLATION WHILE THE CALLS RINGING
FR2501940B1 (en) * 1981-03-11 1985-07-19 Trt Telecom Radio Electr LONGITUDINAL VOLTAGE LOOP DETECTOR
FR2544144A1 (en) * 1983-04-11 1984-10-12 Rosny Unite Tech MODULATOR RELAYS, ESPECIALLY FOR TELECOMMUNICATIONS INSTALLATIONS
CA1240085A (en) * 1984-05-30 1988-08-02 Kenji Takato Calling signal transmission apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1919585C3 (en) * 1969-04-17 1974-06-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Circuit arrangement for calling subscriber stations equipped with ringer receivers in telecommunication systems, in particular telephone switching systems

Also Published As

Publication number Publication date
FR2324183B1 (en) 1982-09-24
DE2540973C2 (en) 1981-09-17
DE2540973A1 (en) 1977-03-17
FR2324183A1 (en) 1977-04-08

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: ALCATEL N.V.

Effective date: 19900930