FR2478412B1 - - Google Patents

Info

Publication number
FR2478412B1
FR2478412B1 FR8005766A FR8005766A FR2478412B1 FR 2478412 B1 FR2478412 B1 FR 2478412B1 FR 8005766 A FR8005766 A FR 8005766A FR 8005766 A FR8005766 A FR 8005766A FR 2478412 B1 FR2478412 B1 FR 2478412B1
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
FR8005766A
Other languages
French (fr)
Other versions
FR2478412A1 (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.)
Radiotechnique Compelec RTC SA
Original Assignee
Radiotechnique Compelec RTC 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 Radiotechnique Compelec RTC SA filed Critical Radiotechnique Compelec RTC SA
Priority to FR8005766A priority Critical patent/FR2478412A1/fr
Publication of FR2478412A1 publication Critical patent/FR2478412A1/fr
Application granted granted Critical
Publication of FR2478412B1 publication Critical patent/FR2478412B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/58—Anti-side-tone circuits
    • H04M1/585—Anti-side-tone circuits implemented without inductive element
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/738—Interface circuits for coupling substations to external telephone lines
    • H04M1/76—Compensating for differences in line impedance

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
FR8005766A 1980-03-14 1980-03-14 Procede pour adapter automatiquement des circuits electroniques de postes telephoniques a la resistance de la ligne, et poste comportant des circuits auto-adaptes Granted FR2478412A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8005766A FR2478412A1 (fr) 1980-03-14 1980-03-14 Procede pour adapter automatiquement des circuits electroniques de postes telephoniques a la resistance de la ligne, et poste comportant des circuits auto-adaptes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8005766A FR2478412A1 (fr) 1980-03-14 1980-03-14 Procede pour adapter automatiquement des circuits electroniques de postes telephoniques a la resistance de la ligne, et poste comportant des circuits auto-adaptes

Publications (2)

Publication Number Publication Date
FR2478412A1 FR2478412A1 (fr) 1981-09-18
FR2478412B1 true FR2478412B1 (enExample) 1982-05-07

Family

ID=9239684

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8005766A Granted FR2478412A1 (fr) 1980-03-14 1980-03-14 Procede pour adapter automatiquement des circuits electroniques de postes telephoniques a la resistance de la ligne, et poste comportant des circuits auto-adaptes

Country Status (1)

Country Link
FR (1) FR2478412A1 (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2540317A1 (fr) * 1983-02-01 1984-08-03 Gesi Circuit de transmission de terminal telephonique
US5029203A (en) * 1988-11-30 1991-07-02 Rohm Co., Ltd. Side tone preventive circuit for telephone
US5473685A (en) * 1992-07-31 1995-12-05 U.S. Philips Corporation Telecommunications end station with electrically controlled terminating impedance
EP0581372A2 (en) * 1992-07-31 1994-02-02 Koninklijke Philips Electronics N.V. End station for wire telecommunication
BE1007715A3 (nl) * 1993-11-09 1995-10-03 Philips Electronics Nv Telecommunicatiesysteem, basisstation voor draadloze telecommunicatie en eindstation voor draadgebonden telecommunicatie.
FR2946213B1 (fr) * 2009-05-29 2012-05-11 Sagem Comm Procede de correction de la degradation du signal telephonique entrainee par la longueur de ligne analogique par le combine

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS495645B1 (enExample) * 1970-02-07 1974-02-08
NL7115947A (enExample) * 1971-11-19 1973-05-22
GB1525057A (en) * 1976-10-12 1978-09-20 Standard Telephones Cables Ltd Regulating pabx/public exchange line loss
GB1546046A (en) * 1976-12-03 1979-05-16 Cselt Centro Studi Lab Telecom Transmitting and receiving circuit for subscriber telephone sets

Also Published As

Publication number Publication date
FR2478412A1 (fr) 1981-09-18

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Legal Events

Date Code Title Description
ST Notification of lapse