BE786796R - Circuit de test de l'etat d'une ligne a deux fils - Google Patents

Circuit de test de l'etat d'une ligne a deux fils

Info

Publication number
BE786796R
BE786796R BE786796A BE786796A BE786796R BE 786796 R BE786796 R BE 786796R BE 786796 A BE786796 A BE 786796A BE 786796 A BE786796 A BE 786796A BE 786796 R BE786796 R BE 786796R
Authority
BE
Belgium
Prior art keywords
test circuit
wire line
line condition
condition test
wire
Prior art date
Application number
BE786796A
Other languages
English (en)
French (fr)
Inventor
G M Le Cardonnel
E Randrianarana
J R E L Pothet
Original Assignee
Int 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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Application granted granted Critical
Publication of BE786796R publication Critical patent/BE786796R/xx

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)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
BE786796A 1971-07-27 1972-07-27 Circuit de test de l'etat d'une ligne a deux fils BE786796R (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7127393A FR2147408A5 (enrdf_load_stackoverflow) 1971-07-27 1971-07-27

Publications (1)

Publication Number Publication Date
BE786796R true BE786796R (fr) 1973-01-29

Family

ID=9080962

Family Applications (1)

Application Number Title Priority Date Filing Date
BE786796A BE786796R (fr) 1971-07-27 1972-07-27 Circuit de test de l'etat d'une ligne a deux fils

Country Status (4)

Country Link
BE (1) BE786796R (enrdf_load_stackoverflow)
DE (1) DE2236266B2 (enrdf_load_stackoverflow)
FR (1) FR2147408A5 (enrdf_load_stackoverflow)
GB (1) GB1353282A (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL7904429A (nl) * 1979-06-06 1980-12-09 Philips Nv Stroomdetectie-inrichting voor een automatische telefooncentrale.
DE3108264C2 (de) * 1981-03-05 1984-05-30 Deutsche Fernsprecher Gesellschaft Mbh Marburg, 3550 Marburg Schaltungsanordnung zur Erkennung des Schaltzustandes einer Erdtaste eines Fernsprechapparates
US4423292A (en) * 1981-09-30 1983-12-27 Bell Telephone Laboratories, Incorporated Detector circuit for communication lines
DE3433330A1 (de) * 1984-09-11 1986-03-20 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur indikation der erdung einer ader einer teilnehmerleitung bei erdtastendruck
RU2259633C2 (ru) * 2002-09-23 2005-08-27 Овчинников Валерий Васильевич Способ передачи дискретных электрических сигналов

Also Published As

Publication number Publication date
FR2147408A5 (enrdf_load_stackoverflow) 1973-03-09
DE2236266B2 (de) 1978-03-23
DE2236266A1 (de) 1973-02-08
GB1353282A (en) 1974-05-15

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