FR2448258A1 - Systeme de test d'un dispositif muni d'un annuleur d'echo - Google Patents

Systeme de test d'un dispositif muni d'un annuleur d'echo

Info

Publication number
FR2448258A1
FR2448258A1 FR7902903A FR7902903A FR2448258A1 FR 2448258 A1 FR2448258 A1 FR 2448258A1 FR 7902903 A FR7902903 A FR 7902903A FR 7902903 A FR7902903 A FR 7902903A FR 2448258 A1 FR2448258 A1 FR 2448258A1
Authority
FR
France
Prior art keywords
test
receiver
signal
echo
modem
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
FR7902903A
Other languages
English (en)
French (fr)
Other versions
FR2448258B1 (OSRAM
Inventor
Loic
Bernard
Yves Guidoux
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.)
Telecommunications Radioelectriques et Telephoniques SA TRT
Original Assignee
Telecommunications Radioelectriques et Telephoniques SA TRT
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 Telecommunications Radioelectriques et Telephoniques SA TRT filed Critical Telecommunications Radioelectriques et Telephoniques SA TRT
Priority to FR7902903A priority Critical patent/FR2448258A1/fr
Priority to EP80200079A priority patent/EP0014505B1/fr
Priority to DE8080200079T priority patent/DE3060426D1/de
Priority to CA000344859A priority patent/CA1144999A/en
Priority to AU55143/80A priority patent/AU530523B2/en
Priority to JP1209080A priority patent/JPS55104151A/ja
Publication of FR2448258A1 publication Critical patent/FR2448258A1/fr
Application granted granted Critical
Publication of FR2448258B1 publication Critical patent/FR2448258B1/fr
Priority to US06/514,540 priority patent/US4549049A/en
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/24—Testing correct operation
    • 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
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/46—Monitoring; Testing

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR7902903A 1979-02-05 1979-02-05 Systeme de test d'un dispositif muni d'un annuleur d'echo Granted FR2448258A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR7902903A FR2448258A1 (fr) 1979-02-05 1979-02-05 Systeme de test d'un dispositif muni d'un annuleur d'echo
EP80200079A EP0014505B1 (fr) 1979-02-05 1980-01-29 Système de test d'un dispositif muni d'un annuleur d'écho
DE8080200079T DE3060426D1 (en) 1979-02-05 1980-01-29 Device testing system provided with an echo suppressor
CA000344859A CA1144999A (en) 1979-02-05 1980-01-31 Arrangement for testing a device provided with an echo canceller
AU55143/80A AU530523B2 (en) 1979-02-05 1980-02-01 Testing echo cancellor
JP1209080A JPS55104151A (en) 1979-02-05 1980-02-05 Testing circuit
US06/514,540 US4549049A (en) 1979-02-05 1983-07-18 Arrangement for testing a device provided with an echo canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7902903A FR2448258A1 (fr) 1979-02-05 1979-02-05 Systeme de test d'un dispositif muni d'un annuleur d'echo

Publications (2)

Publication Number Publication Date
FR2448258A1 true FR2448258A1 (fr) 1980-08-29
FR2448258B1 FR2448258B1 (OSRAM) 1982-01-08

Family

ID=9221610

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7902903A Granted FR2448258A1 (fr) 1979-02-05 1979-02-05 Systeme de test d'un dispositif muni d'un annuleur d'echo

Country Status (7)

Country Link
US (1) US4549049A (OSRAM)
EP (1) EP0014505B1 (OSRAM)
JP (1) JPS55104151A (OSRAM)
AU (1) AU530523B2 (OSRAM)
CA (1) CA1144999A (OSRAM)
DE (1) DE3060426D1 (OSRAM)
FR (1) FR2448258A1 (OSRAM)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908284C1 (en) * 1989-03-14 1990-06-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De Test device for checking the cancelling function of a digital echo canceller

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434789B (sv) * 1982-12-21 1984-08-13 Ellemtel Utvecklings Ab Forfarande for detektering av farliga linjespenningar over en tvatradig linje
SE441052B (sv) * 1984-02-01 1985-09-02 Ellemtel Utvecklings Ab Forfarande for att testa funktionen hos en anordning for adaptiv ekoeliminering
DE3583052D1 (de) * 1984-03-30 1991-07-11 Siemens Ag Schaltungsanordnung zum pruefen der funktionsfaehigkeit einer datenuebertragunseinrichtung.
JPS6239924A (ja) * 1985-08-16 1987-02-20 Nec Corp デ−タ伝送装置
US4825459A (en) * 1985-12-30 1989-04-25 American Telephone And Telegraph Company Local loop test arrangement in an echo canceller based full duplex modem
SE468015B (sv) * 1987-04-15 1992-10-19 Sunds Defibrator Ind Ab Anlaeggning foer framstaellning av fibermassa av lignocellulosamaterial
EP0300352B1 (de) * 1987-07-16 1992-12-09 Siemens Aktiengesellschaft Prüfeinrichtung für digitale Echokompensatoren
NL8701750A (nl) * 1987-07-24 1989-02-16 At & T & Philips Telecomm Zend-ontvanginrichting voor vol-duplex datatransmissie met een echocompensator en testvoorzieningen.
JP2580669B2 (ja) * 1988-01-26 1997-02-12 日本電気株式会社 折返し試験回路
JP2745694B2 (ja) * 1989-06-27 1998-04-28 日本電気株式会社 双方向バス伝送方式
FR2674082B1 (fr) * 1991-03-14 1994-11-25 Bull Sa Procedes de test pour transmissions serie bidirectionnelles et circuits pour leur mise en óoeuvre.
FR2674076A1 (fr) * 1991-03-14 1992-09-18 Bull Sa Circuit integre a impedances asservies et application aux emetteurs-recepteurs notamment pour la communication entre unites d'un systeme informatique.
US5267300A (en) * 1991-10-07 1993-11-30 Racal-Datacom, Inc. High speed digital data transmission over switched voice network
JP2763990B2 (ja) * 1992-08-12 1998-06-11 富士通株式会社 ２線式全二重モデム
US6011783A (en) * 1997-06-11 2000-01-04 Nortel Networks Corporation Method and apparatus for monitoring echo cancellation performance within a telephone communications network
KR19990075508A (ko) * 1998-03-20 1999-10-15 김영환 반향제거기 시험을 위한 펄스부호변조 데이터 지연장치

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2357119A1 (fr) * 1976-06-28 1978-01-27 Philips Nv Dispositif pour la transmission bidirectionnelle simultanee de donnees par des liaisons a deux fils
FR2386202A1 (fr) * 1977-03-31 1978-10-27 Cit Alcatel Dispositif de test en local pour un equipement de transmission de donnees duplex

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3647993A (en) * 1970-05-18 1972-03-07 Wescom Tone disabler
US3721958A (en) * 1971-04-30 1973-03-20 Gen Electric Testing arrangement for a data communication system
US3783194A (en) * 1972-11-20 1974-01-01 Milgo Electronic Corp Data modem having a fast turn-around time over direct distance dialed networks
AU514263B2 (en) * 1977-01-17 1981-01-29 T.R.T. Digital echo canceller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2357119A1 (fr) * 1976-06-28 1978-01-27 Philips Nv Dispositif pour la transmission bidirectionnelle simultanee de donnees par des liaisons a deux fils
FR2386202A1 (fr) * 1977-03-31 1978-10-27 Cit Alcatel Dispositif de test en local pour un equipement de transmission de donnees duplex

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3908284C1 (en) * 1989-03-14 1990-06-07 Siemens Ag, 1000 Berlin Und 8000 Muenchen, De Test device for checking the cancelling function of a digital echo canceller

Also Published As

Publication number Publication date
EP0014505B1 (fr) 1982-05-19
JPS6228899B2 (OSRAM) 1987-06-23
AU5514380A (en) 1980-08-14
AU530523B2 (en) 1983-07-21
FR2448258B1 (OSRAM) 1982-01-08
US4549049A (en) 1985-10-22
JPS55104151A (en) 1980-08-09
DE3060426D1 (en) 1982-07-08
EP0014505A1 (fr) 1980-08-20
CA1144999A (en) 1983-04-19

Similar Documents

Publication Publication Date Title
FR2448258A1 (fr) Systeme de test d'un dispositif muni d'un annuleur d'echo
KR970016593A (ko) 디지털 전송 장치의 신호 전파 시간 측정 장치
BE842817A (fr) Systeme de transfert avec un emetteur et un recepteur pour la trasmission de signaux au moyen de valeurs de sortie discretes qui caracterisent les signaux transmis en quentification de temps ey en quantifacation d'amplitude au moins trivalente
GB1063547A (en) Improvements relating to signal transmission systems
CA2024314A1 (en) Loop-back device for half-duplex optical transmission system
ES8507753A1 (es) Procedimiento y aparato de telecontrol para transmision de datos en lineas fisicas
FR2455815A1 (fr) Dispositif de commande d'un hacheur
US4399556A (en) Device for locating audio surveillance apparatus
GB1355468A (en) Data receiving apparatus
GB1124743A (en) Digital processing of fsk and psk signals
GB2002202A (en) Arrangement for making continuity tests in telecommunication systems
GB1482799A (en) Dc signal receiving circuits
JPS5466009A (en) Detection system for circuit fault of two-wire communication device
SU1406619A1 (ru) Устройство дл приема и передачи информации
JPS56112152A (en) Diagnosing method of signal transmitting device
SU445167A1 (ru) Устройство дл непрерывного автоматического контрол качества четырехпроводного телефонного канала
DE69012668D1 (de) Signalisierungsdetektor für Gebührensignalisierung für eine Telefonverbindungsleitung.
GB1522663A (en) Data modems with automatic equalization drop-out detection and data echo protection
FR2358790A1 (fr) Annuleur d'echo auto-adaptatif pour transmission de donnees en bande de base
JPS5496065A (en) Distance measuring method
SELIN The design of a sequential test for the detection of known signal in normal non-white noise(Sequential test proposed for detection of constant signals in correlated normal noise, considering discrete and continuous noise)
JPS572141A (en) Loop-type optical communication system
GB1181123A (en) Improvements in and relating to Telephone Signal Transmission System
JPS6471397A (en) Article identifying system
JPS5654144A (en) Branch device for data communication

Legal Events

Date Code Title Description
ST Notification of lapse