FR2363247A1 - Equipement terminal pour un systeme multiplex telephonique a courants porteurs - Google Patents

Equipement terminal pour un systeme multiplex telephonique a courants porteurs

Info

Publication number
FR2363247A1
FR2363247A1 FR7625577A FR7625577A FR2363247A1 FR 2363247 A1 FR2363247 A1 FR 2363247A1 FR 7625577 A FR7625577 A FR 7625577A FR 7625577 A FR7625577 A FR 7625577A FR 2363247 A1 FR2363247 A1 FR 2363247A1
Authority
FR
France
Prior art keywords
terminal equipment
telephone system
modem
carrier currents
multiplex
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
FR7625577A
Other languages
English (en)
Other versions
FR2363247B1 (fr
Inventor
Claude Boulanger
Christian Poina
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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT 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 Alcatel CIT SA filed Critical Alcatel CIT SA
Priority to FR7625577A priority Critical patent/FR2363247A1/fr
Priority to GB32124/77A priority patent/GB1534470A/en
Priority to US05/821,218 priority patent/US4130743A/en
Priority to DE19772737082 priority patent/DE2737082A1/de
Priority to JP9830577A priority patent/JPS5326608A/ja
Priority to NL7709172A priority patent/NL7709172A/xx
Priority to SE7709461A priority patent/SE428622B/xx
Publication of FR2363247A1 publication Critical patent/FR2363247A1/fr
Application granted granted Critical
Publication of FR2363247B1 publication Critical patent/FR2363247B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/02—Selecting arrangements for multiplex systems for frequency-division multiplexing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
  • Bidirectional Digital Transmission (AREA)

Abstract

L'invention se réfère à l'équipement terminal pour un système multiplex à courant porteur, avec un semi-suppresseur d'écho et un modem de voie. Selon l'invention, l'atténuateur qui est inséré dans la chaîne émission est disposé derrière un premier étage de modulation, ce qui permet d'exploiter le temps de propagation des filtres du modem pour la réaction d'intervention de l'atténuateur. Application : modem de voies du groupe primaire en multiplex de fréquences téléphoniques.
FR7625577A 1976-08-24 1976-08-24 Equipement terminal pour un systeme multiplex telephonique a courants porteurs Granted FR2363247A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7625577A FR2363247A1 (fr) 1976-08-24 1976-08-24 Equipement terminal pour un systeme multiplex telephonique a courants porteurs
GB32124/77A GB1534470A (en) 1976-08-24 1977-08-01 Terminal equipment for a multiplex carrier current telephone system
US05/821,218 US4130743A (en) 1976-08-24 1977-08-02 Terminal equipment for a multiplex carrier current telephone system
DE19772737082 DE2737082A1 (de) 1976-08-24 1977-08-17 Endeinrichtung fuer ein multiplextelefonsystem mit traegerstroemen
JP9830577A JPS5326608A (en) 1976-08-24 1977-08-18 Terminal station for carrier telephone multiplex system
NL7709172A NL7709172A (nl) 1976-08-24 1977-08-18 Terminaluitrusting voor een multiplex-telefoon- stelsel met draaggolven.
SE7709461A SE428622B (sv) 1976-08-24 1977-08-23 Avslutningsutrustning for ett berfrekvens-telefonsystem

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7625577A FR2363247A1 (fr) 1976-08-24 1976-08-24 Equipement terminal pour un systeme multiplex telephonique a courants porteurs

Publications (2)

Publication Number Publication Date
FR2363247A1 true FR2363247A1 (fr) 1978-03-24
FR2363247B1 FR2363247B1 (fr) 1981-03-06

Family

ID=9177096

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7625577A Granted FR2363247A1 (fr) 1976-08-24 1976-08-24 Equipement terminal pour un systeme multiplex telephonique a courants porteurs

Country Status (7)

Country Link
US (1) US4130743A (fr)
JP (1) JPS5326608A (fr)
DE (1) DE2737082A1 (fr)
FR (1) FR2363247A1 (fr)
GB (1) GB1534470A (fr)
NL (1) NL7709172A (fr)
SE (1) SE428622B (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4644108A (en) * 1982-10-27 1987-02-17 International Business Machines Corporation Adaptive sub-band echo suppressor
GB2139054B (en) * 1983-04-22 1986-09-24 Gen Electric Co Plc Loudspeaking telephone instruments
US7113750B2 (en) * 2002-12-16 2006-09-26 Tektronix, Inc. Apparatus and method for input channel isolation within an electronic test instrument
CN100442059C (zh) * 2004-05-21 2008-12-10 特克特朗尼克公司 在电子测试仪器中用于将输入信道隔离的装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2251028A (en) * 1940-09-28 1941-07-29 Bell Telephone Labor Inc Control of transmission in two-way signal wave transmission systems
US2258966A (en) * 1940-10-12 1941-10-14 Bell Telephone Labor Inc Control of transmission in two-way signaling systems
US2295153A (en) * 1941-06-10 1942-09-08 Bell Telephone Labor Inc Two-way signal transmission system
US3397401A (en) * 1966-05-27 1968-08-13 Hughes Aircraft Co Voice operated communication system
US3896273A (en) * 1971-01-08 1975-07-22 Communications Satellite Corp Digital echo suppressor
IT1030881B (it) * 1973-12-10 1979-04-10 Cit Alcatel Semi soppressore di eco per un terminale di una linea elettrica a quattro fili
US3942116A (en) * 1975-03-13 1976-03-02 California Microwave, Inc. Transceiver having improved voice actuated carrier and echo suppression circuit

Also Published As

Publication number Publication date
GB1534470A (en) 1978-12-06
SE428622B (sv) 1983-07-11
NL7709172A (nl) 1978-02-28
SE7709461L (sv) 1978-02-25
JPS5326608A (en) 1978-03-11
DE2737082A1 (de) 1978-03-09
FR2363247B1 (fr) 1981-03-06
US4130743A (en) 1978-12-19

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Legal Events

Date Code Title Description
ST Notification of lapse