IT1144154B - Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico - Google Patents

Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico

Info

Publication number
IT1144154B
IT1144154B IT67323/81A IT6732381A IT1144154B IT 1144154 B IT1144154 B IT 1144154B IT 67323/81 A IT67323/81 A IT 67323/81A IT 6732381 A IT6732381 A IT 6732381A IT 1144154 B IT1144154 B IT 1144154B
Authority
IT
Italy
Prior art keywords
transmission system
conductor line
bidirectional transmission
simultaneous bidirectional
numeric telephone
Prior art date
Application number
IT67323/81A
Other languages
English (en)
Other versions
IT8167323A0 (it
Inventor
Roberto Fossati
Vincenzo Lazzari
Original Assignee
Cselt Centro Studi Lab Telecom
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 Cselt Centro Studi Lab Telecom filed Critical Cselt Centro Studi Lab Telecom
Priority to IT67323/81A priority Critical patent/IT1144154B/it
Publication of IT8167323A0 publication Critical patent/IT8167323A0/it
Priority to NO820680A priority patent/NO820680L/no
Priority to EP82101802A priority patent/EP0059967A1/en
Priority to US06/562,997 priority patent/US4484322A/en
Application granted granted Critical
Publication of IT1144154B publication Critical patent/IT1144154B/it

Links

Classifications

    • 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
    • H04B3/231—Echo cancellers using readout of a memory to provide the echo replica

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Interface Circuits In Exchanges (AREA)
IT67323/81A 1981-03-09 1981-03-09 Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico IT1144154B (it)

Priority Applications (4)

Application Number Priority Date Filing Date Title
IT67323/81A IT1144154B (it) 1981-03-09 1981-03-09 Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico
NO820680A NO820680L (no) 1981-03-09 1982-03-04 System for toveis samtidig transmisjon via en totraads ledning for digital telefon
EP82101802A EP0059967A1 (en) 1981-03-09 1982-03-08 System for the bidirectional simultaneous transmission via a two-wire line for digital telephone
US06/562,997 US4484322A (en) 1981-03-09 1983-12-16 Circuit arrangement for suppressing outgoing-signal noises in system for bidirectional transmission of digitized signals over two-wire line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT67323/81A IT1144154B (it) 1981-03-09 1981-03-09 Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico

Publications (2)

Publication Number Publication Date
IT8167323A0 IT8167323A0 (it) 1981-03-09
IT1144154B true IT1144154B (it) 1986-10-29

Family

ID=11301443

Family Applications (1)

Application Number Title Priority Date Filing Date
IT67323/81A IT1144154B (it) 1981-03-09 1981-03-09 Sistema di trasmissione simultanea bidirezionale su linea a due conduttori per telefono numerico

Country Status (4)

Country Link
US (1) US4484322A (it)
EP (1) EP0059967A1 (it)
IT (1) IT1144154B (it)
NO (1) NO820680L (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123259A (en) * 1982-06-25 1984-01-25 Philips Electronic Associated Digital duplex communication system
GB2144950A (en) * 1983-08-10 1985-03-13 Philips Electronic Associated Data transmission system
LU85402A1 (de) * 1983-12-01 1984-09-11 Siemens Ag Verfahren und schaltungsanordnung zur kompensation von uebersprech-u./o.echosignalen
IT1184949B (it) * 1985-05-14 1987-10-28 Sip Perfezionamento ai sistemi per la trasmissione numerica bidirezionale con cancellazione d eco
US4711529A (en) * 1985-11-05 1987-12-08 Itt Defense Communications, A Division Of Itt Corporation Optical interface apparatus
US4811342A (en) * 1985-11-12 1989-03-07 Racal Data Communications Inc. High speed analog echo canceller
US4879738A (en) * 1989-02-16 1989-11-07 Northern Telecom Limited Digital telephony card for use in an operator system
US5487102A (en) * 1992-12-10 1996-01-23 Volt Information Sciences, Inc. Voice interface board for use in an operator system
DE102004025576B4 (de) * 2004-05-25 2006-03-30 Infineon Technologies Ag Sende-und Empfangsanordnung mit einer Regelung zur Störsignalunterdrückung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3535473A (en) * 1966-10-31 1970-10-20 Bell Telephone Labor Inc Self-adjusting echo canceller
JPS51144111A (en) * 1975-06-05 1976-12-10 Kokusai Denshin Denwa Co Ltd <Kdd> Echo cancelling method
NO140648C (no) * 1977-10-24 1983-03-29 Elektrisk Bureau As Direktiv kobler.
DE2839231C2 (de) * 1978-09-08 1980-09-18 Siemens Ag, 1000 Berlin Und 8000 Muenchen Verfahren zur Vollduplex-Zweidraht-Ubertragung eines ternären Datensignals
IT1159938B (it) * 1978-10-18 1987-03-04 Sits Soc It Telecom Siemens Memoria elastica per demultiplatore sincrono di particolare applicazione nei sistemi di trasmissione a divisione di tempo
IT1118946B (it) * 1979-10-04 1986-03-03 Cselt Centro Studi Lab Telecom Ricetrasmettitore per trasmissione bidirezionale simultanea di segnali numerici su una linea unica

Also Published As

Publication number Publication date
US4484322A (en) 1984-11-20
EP0059967A1 (en) 1982-09-15
NO820680L (no) 1982-09-10
IT8167323A0 (it) 1981-03-09

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