FR2324183A1 - Circuit de detection de l'etat d'une ligne d'abonne et de connexion du courant d'appel dans les systemes de commutation telephonique - Google Patents

Circuit de detection de l'etat d'une ligne d'abonne et de connexion du courant d'appel dans les systemes de commutation telephonique

Info

Publication number
FR2324183A1
FR2324183A1 FR7627286A FR7627286A FR2324183A1 FR 2324183 A1 FR2324183 A1 FR 2324183A1 FR 7627286 A FR7627286 A FR 7627286A FR 7627286 A FR7627286 A FR 7627286A FR 2324183 A1 FR2324183 A1 FR 2324183A1
Authority
FR
France
Prior art keywords
indicators
telephone line
exchange
switch
blocking diode
Prior art date
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.)
Granted
Application number
FR7627286A
Other languages
English (en)
Other versions
FR2324183B1 (fr
Inventor
Gerhard Fink
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 true FR2324183A1 (fr) 1977-04-08
FR2324183B1 FR2324183B1 (fr) 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 (fr)
DE (1) DE2540973C2 (fr)
FR (1) FR2324183A1 (fr)

Cited By (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
EP0060006A1 (fr) * 1981-03-11 1982-09-15 Telecommunications Radioelectriques Et Telephoniques T.R.T. Détecteur 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
EP0165516A2 (fr) * 1984-05-30 1985-12-27 Fujitsu Limited Appareil de transmission de signaux d'appel

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

Cited By (7)

* 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
EP0060006A1 (fr) * 1981-03-11 1982-09-15 Telecommunications Radioelectriques Et Telephoniques T.R.T. Détecteur de boucle peu sensible aux tensions longitudinales
FR2501940A1 (fr) * 1981-03-11 1982-09-17 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
EP0122852A1 (fr) * 1983-04-11 1984-10-24 UNITE TECHNIQUE ROSNY, Société dite: Relais modulateur, notamment pour installations de télécommunications
EP0165516A2 (fr) * 1984-05-30 1985-12-27 Fujitsu Limited Appareil de transmission de signaux d'appel
EP0165516A3 (en) * 1984-05-30 1988-06-01 Fujitsu Limited Calling signal transmission apparatus

Also Published As

Publication number Publication date
FR2324183B1 (fr) 1982-09-24
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