FR2057868A5 - - Google Patents

Info

Publication number
FR2057868A5
FR2057868A5 FR7028186A FR7028186A FR2057868A5 FR 2057868 A5 FR2057868 A5 FR 2057868A5 FR 7028186 A FR7028186 A FR 7028186A FR 7028186 A FR7028186 A FR 7028186A FR 2057868 A5 FR2057868 A5 FR 2057868A5
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
FR7028186A
Other languages
French (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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Application granted granted Critical
Publication of FR2057868A5 publication Critical patent/FR2057868A5/fr
Expired 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)
FR7028186A 1969-08-05 1970-07-30 Expired FR2057868A5 (enExample)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US84758169A 1969-08-05 1969-08-05

Publications (1)

Publication Number Publication Date
FR2057868A5 true FR2057868A5 (enExample) 1971-05-21

Family

ID=25300976

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7028186A Expired FR2057868A5 (enExample) 1969-08-05 1970-07-30

Country Status (6)

Country Link
US (1) US3622709A (enExample)
BE (1) BE754235A (enExample)
DE (1) DE2038933A1 (enExample)
FR (1) FR2057868A5 (enExample)
GB (1) GB1322216A (enExample)
NL (1) NL7011277A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2286573A1 (fr) * 1974-09-24 1976-04-23 Constr Telephoniques Circuit d'exploration pour systeme de commutation

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL289634A (enExample) * 1962-03-01
US3772477A (en) * 1972-07-17 1973-11-13 Bell Telephone Labor Inc Telephone dial pulse detection circuit
US3819866A (en) * 1972-12-18 1974-06-25 Bell Telephone Labor Inc Light coupled loop current detector
US3825682A (en) * 1973-06-27 1974-07-23 Rca Corp Balanced line driver, line receiver system
US3914556A (en) * 1974-06-12 1975-10-21 Itt On-hook and off-hook detector for telephone switching systems
US3939308A (en) * 1974-09-27 1976-02-17 Gte Automatic Electric (Canada) Limited Electronic side of line detector
US3999018A (en) * 1975-03-05 1976-12-21 Stromberg-Carlson Corporation Timer associated with CB relay
US4027109A (en) * 1975-06-27 1977-05-31 Smith Lloyd M Telephone call diverting system
GB1563803A (en) * 1975-11-26 1980-04-02 Post Office Telecommunications transmission and signalling curcuits
US4099032A (en) * 1977-03-25 1978-07-04 Wescom, Inc. Loop current detector
US4166931A (en) * 1978-04-24 1979-09-04 Bell Telephone Laboratories, Incorporated Miniature bridge lifter for telephone lines
CH635216A5 (de) * 1978-10-25 1983-03-15 Hansjoerg Erne Geraet zur ueberwachung des linienstromes in einer telefonleitung.
DE2850929C2 (de) * 1978-11-24 1982-06-09 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Unterdrückung von Störspannungseinflüssen bei der Bewertung des Signalzustandes auf Übertragungsleitungen, insbesondere auf Teilnehmeranschlußleitungen in Fernsprechanlagen
JPS5637793A (en) * 1979-09-05 1981-04-11 Hitachi Ltd Loop detecting circuit
US4389543A (en) * 1980-12-18 1983-06-21 Martus Granirer Telephone-activated audio control circuit
US4454477A (en) * 1982-04-28 1984-06-12 At&T Bell Laboratories Loop current detector with threshold setting impedance
EP0201635B1 (en) * 1985-05-17 1991-12-18 BELL TELEPHONE MANUFACTURING COMPANY Naamloze Vennootschap Telecommunication line circuit
DE3525566A1 (de) * 1985-07-15 1987-01-15 Siemens Ag Schaltungsanordnung zur erkennung von erdtastenfunktionen in fernsprechvermittlungsanlagen
EP0759672A1 (en) * 1995-08-23 1997-02-26 AT&T IPM Corp. Minimally invasive current sensing circuit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA584209A (en) * 1955-11-03 1959-09-29 Pitlik Hillel Electronic telephone subscriber's line circuit for neutralizing the effects of longitudinal induction and longitudinal unbalance
DE1073552B (de) * 1956-12-07 1960-01-21 Western Electric Company Incor porated New York N Y (V St A) Schaltungsanordnung zur Übertragung von den Leitungszustand anzeigenden Informationen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2286573A1 (fr) * 1974-09-24 1976-04-23 Constr Telephoniques Circuit d'exploration pour systeme de commutation

Also Published As

Publication number Publication date
GB1322216A (en) 1973-07-04
NL7011277A (enExample) 1971-02-09
DE2038933A1 (de) 1971-02-18
US3622709A (en) 1971-11-23
BE754235A (fr) 1970-12-31

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Legal Events

Date Code Title Description
ST Notification of lapse