FR2324183B1 - - Google Patents

Info

Publication number
FR2324183B1
FR2324183B1 FR7627286A FR7627286A FR2324183B1 FR 2324183 B1 FR2324183 B1 FR 2324183B1 FR 7627286 A FR7627286 A FR 7627286A FR 7627286 A FR7627286 A FR 7627286A FR 2324183 B1 FR2324183 B1 FR 2324183B1
Authority
FR
France
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
FR7627286A
Other languages
French (fr)
Other versions
FR2324183A1 (fr
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
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 International Standard Electric Corp filed Critical International Standard Electric Corp
Publication of FR2324183A1 publication Critical patent/FR2324183A1/fr
Application granted granted Critical
Publication of FR2324183B1 publication Critical patent/FR2324183B1/fr
Granted legal-status Critical Current

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)
FR7627286A 1975-09-13 1976-09-10 Circuit de detection de l'etat d'une ligne d'abonne et de connexion du courant d'appel dans les systemes de commutation telephonique Granted FR2324183A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19752540973 DE2540973C2 (de) 1975-09-13 1975-09-13 Schaltungsanordnung zur Erkennung von Betriebszuständen einer Teilnehmerleitung und zur Rufanschaltung in Fernsprechvermittlungsanlagen

Publications (2)

Publication Number Publication Date
FR2324183A1 FR2324183A1 (fr) 1977-04-08
FR2324183B1 true FR2324183B1 (enExample) 1982-09-24

Family

ID=5956449

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7627286A Granted FR2324183A1 (fr) 1975-09-13 1976-09-10 Circuit de detection de l'etat d'une ligne d'abonne et de connexion du courant d'appel dans les systemes de commutation telephonique

Country Status (3)

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

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394944A1 (fr) * 1977-06-17 1979-01-12 Labo Cent Telecommunicat Dispositif d'isolement de l'appelant pendant la sonnerie de l'appele
FR2501940B1 (fr) * 1981-03-11 1985-07-19 Trt Telecom Radio Electr Detecteur de boucle peu sensible aux tensions longitudinales
FR2544144A1 (fr) * 1983-04-11 1984-10-12 Rosny Unite Tech Relais modulateur, notamment pour installations de telecommunications
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 (de) * 1969-04-17 1974-06-06 Standard Elektrik Lorenz Ag, 7000 Stuttgart Schaltungsanordnung zum Anruf von mit Tonrufempfängern ausgerüsteten Teilnehmerstellen in Fernmelde-, insbesondere Fernsprechvermittlungsanlagen

Also Published As

Publication number Publication date
FR2324183A1 (fr) 1977-04-08
DE2540973A1 (de) 1977-03-17
DE2540973C2 (de) 1981-09-17
BE846034A (fr) 1977-03-10

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Legal Events

Date Code Title Description
ST Notification of lapse