FR2368844A1 - Dispositif de supervision de ligne telephonique - Google Patents

Dispositif de supervision de ligne telephonique

Info

Publication number
FR2368844A1
FR2368844A1 FR7631847A FR7631847A FR2368844A1 FR 2368844 A1 FR2368844 A1 FR 2368844A1 FR 7631847 A FR7631847 A FR 7631847A FR 7631847 A FR7631847 A FR 7631847A FR 2368844 A1 FR2368844 A1 FR 2368844A1
Authority
FR
France
Prior art keywords
comparator
bridge circuit
open
line
telephone line
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
FR7631847A
Other languages
English (en)
Other versions
FR2368844B1 (fr
Inventor
Daniel Michel Auguste Fe Bolus
Jean-Pierre Chevillon
Jean-Charles Comte
Pierre Denis Paul Philipp
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.)
Laboratoire Central de Telecommunications SA
Original Assignee
Laboratoire Central de Telecommunications SA
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 Laboratoire Central de Telecommunications SA filed Critical Laboratoire Central de Telecommunications SA
Priority to FR7631847A priority Critical patent/FR2368844A1/fr
Publication of FR2368844A1 publication Critical patent/FR2368844A1/fr
Application granted granted Critical
Publication of FR2368844B1 publication Critical patent/FR2368844B1/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Monitoring And Testing Of Exchanges (AREA)

Abstract

L'invention concerne un dispositif de supervision de ligne téléphonique. Le principe de l'invention est fondé sur la détection de deux seuils différents S sup et S inf. La fermeture de la ligne est détectée lorsque le courant de ligne I passe au-dessus du seuil supérieur S sup. L'ouverture de la ligne est détectée lorsque le courant de ligne I passe en dessous du seuil inférieur S inf. Le dispositif selon l'invention comporte un pont différentiel symétrique à structure en treillis inséré dans la ligne, un comparateur dont les deux entrées sont reliées aux deux sorties différentielles du pont, et une résistance de réaction placée entre la sortie du comparateur et une sortie du pont. Application aux centraux téléphoniques.
FR7631847A 1976-10-22 1976-10-22 Dispositif de supervision de ligne telephonique Granted FR2368844A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7631847A FR2368844A1 (fr) 1976-10-22 1976-10-22 Dispositif de supervision de ligne telephonique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7631847A FR2368844A1 (fr) 1976-10-22 1976-10-22 Dispositif de supervision de ligne telephonique

Publications (2)

Publication Number Publication Date
FR2368844A1 true FR2368844A1 (fr) 1978-05-19
FR2368844B1 FR2368844B1 (fr) 1982-02-05

Family

ID=9179091

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7631847A Granted FR2368844A1 (fr) 1976-10-22 1976-10-22 Dispositif de supervision de ligne telephonique

Country Status (1)

Country Link
FR (1) FR2368844A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089355A1 (fr) * 1981-09-30 1983-09-28 Western Electric Co Circuit detecteur pour lignes de communication.
EP0309115A2 (fr) * 1987-09-22 1989-03-29 Nortel Networks Corporation Circuit d'interface de ligne

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
EXBK/69 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0089355A1 (fr) * 1981-09-30 1983-09-28 Western Electric Co Circuit detecteur pour lignes de communication.
EP0089355A4 (fr) * 1981-09-30 1985-07-01 Western Electric Co Circuit detecteur pour lignes de communication.
EP0309115A2 (fr) * 1987-09-22 1989-03-29 Nortel Networks Corporation Circuit d'interface de ligne
EP0309115A3 (fr) * 1987-09-22 1991-10-30 Nortel Networks Corporation Circuit d'interface de ligne

Also Published As

Publication number Publication date
FR2368844B1 (fr) 1982-02-05

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Legal Events

Date Code Title Description
ST Notification of lapse