BE848968R - LOOP STATUS DETECTOR PER TELEPHONE LINE - Google Patents

LOOP STATUS DETECTOR PER TELEPHONE LINE

Info

Publication number
BE848968R
BE848968R BE2055500A BE2055500A BE848968R BE 848968 R BE848968 R BE 848968R BE 2055500 A BE2055500 A BE 2055500A BE 2055500 A BE2055500 A BE 2055500A BE 848968 R BE848968 R BE 848968R
Authority
BE
Belgium
Prior art keywords
telephone line
status detector
loop status
detector per
per telephone
Prior art date
Application number
BE2055500A
Other languages
French (fr)
Inventor
A Mingaud
P H Cogne
C M A Ciavaldini
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
Application granted granted Critical
Publication of BE848968R publication Critical patent/BE848968R/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
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/14—Indicating direction of current; Indicating polarity of voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/145—Indicating the presence of current or voltage
    • G01R19/15—Indicating the presence of current

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Monitoring And Testing Of Exchanges (AREA)
BE2055500A 1975-12-03 1976-12-02 LOOP STATUS DETECTOR PER TELEPHONE LINE BE848968R (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7536924A FR2334113A1 (en) 1975-12-03 1975-12-03 LINE CURRENT DETECTION CIRCUIT

Publications (1)

Publication Number Publication Date
BE848968R true BE848968R (en) 1977-06-02

Family

ID=9163243

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2055500A BE848968R (en) 1975-12-03 1976-12-02 LOOP STATUS DETECTOR PER TELEPHONE LINE

Country Status (3)

Country Link
BE (1) BE848968R (en)
FR (1) FR2334113A1 (en)
GB (1) GB1516049A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2516660A1 (en) * 1981-11-17 1983-05-20 Telemecanique Electrique Current detector for relay control from electronic processor - has opto-electronic coupler using LED supplied by voltage drop across silicon diodes connected in series within relay circuit
JPS60518A (en) * 1983-06-16 1985-01-05 Hayashibara Takeshi Device for responding dropped voltage at nonlinear section of diode
FR2557412B1 (en) * 1983-12-23 1990-07-27 Cit Alcatel TWO-WIRE SUBSCRIBER TRUNK TESTING DEVICE
DE10219056A1 (en) * 2002-04-24 2003-11-13 Demag Cranes & Components Gmbh Bus driver for bidirectional two-wire bus systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2131038A5 (en) * 1971-03-30 1972-11-10 Ass Ouvriers Instr Preci
GB1414459A (en) * 1972-01-12 1975-11-19 Standard Telephones Cables Ltd Electronic relay
US3898389A (en) * 1972-10-18 1975-08-05 Communic Mfg Voltage and/or current-sensitive loop extender
DE2345880B1 (en) * 1973-09-12 1975-01-09 Telefonbau & Normalzeit Gmbh Circuit arrangement for detecting loop states

Also Published As

Publication number Publication date
FR2334113B1 (en) 1980-05-23
FR2334113A1 (en) 1977-07-01
GB1516049A (en) 1978-06-28

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