DK137883A - Telefonopkaldekredsloeb til hurtig duplex-datatransmission - Google Patents

Telefonopkaldekredsloeb til hurtig duplex-datatransmission Download PDF

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Publication number
DK137883A
DK137883A DK137883A DK137883A DK137883A DK 137883 A DK137883 A DK 137883A DK 137883 A DK137883 A DK 137883A DK 137883 A DK137883 A DK 137883A DK 137883 A DK137883 A DK 137883A
Authority
DK
Denmark
Prior art keywords
quick
data transmission
phone call
call circuit
duplex data
Prior art date
Application number
DK137883A
Other languages
Danish (da)
English (en)
Other versions
DK137883D0 (da
Inventor
King Y Cheng
Arthur J Carlson
Original Assignee
Anderson Jacobson 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 Anderson Jacobson Inc filed Critical Anderson Jacobson Inc
Publication of DK137883D0 publication Critical patent/DK137883D0/da
Publication of DK137883A publication Critical patent/DK137883A/da

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/143—Two-way operation using the same type of signal, i.e. duplex for modulated signals
    • 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
    • H04B3/235—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 combined with adaptive equaliser

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Communication Control (AREA)
DK137883A 1982-04-01 1983-03-25 Telefonopkaldekredsloeb til hurtig duplex-datatransmission DK137883A (da)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/364,320 US4481622A (en) 1982-04-01 1982-04-01 High speed dial-up telephone circuit full duplex data transmission techniques
JP57182237A JPS58173937A (ja) 1982-04-01 1982-10-19 電話回線式デ−タ送信装置及び方法

Publications (2)

Publication Number Publication Date
DK137883D0 DK137883D0 (da) 1983-03-25
DK137883A true DK137883A (da) 1983-10-02

Family

ID=51831961

Family Applications (1)

Application Number Title Priority Date Filing Date
DK137883A DK137883A (da) 1982-04-01 1983-03-25 Telefonopkaldekredsloeb til hurtig duplex-datatransmission

Country Status (10)

Country Link
US (1) US4481622A (de)
EP (1) EP0091014A3 (de)
JP (1) JPS58173937A (de)
CA (1) CA1184684A (de)
DE (1) DE3238818A1 (de)
DK (1) DK137883A (de)
FI (1) FI831046L (de)
FR (1) FR2524742A1 (de)
GB (1) GB2117606B (de)
NO (1) NO831190L (de)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2541837A1 (fr) * 1983-02-25 1984-08-31 Trt Telecom Radio Electr Procede de reduction du temps de convergence d'un annuleur d'echo et dispositif pour mettre en oeuvre ce procede
US4621356A (en) * 1983-07-18 1986-11-04 Scipione Fred J Communications interface for duplex transmission and reception of data and other signals over telephone lines
GB2146509B (en) * 1983-09-10 1986-08-13 Stc Plc Data transmission system
WO1985004540A1 (en) * 1984-04-02 1985-10-10 American Telephone & Telegraph Company Two-wire duplex data transmission system
US4694450A (en) * 1984-05-31 1987-09-15 Staab Hans P Method and apparatus for adaptive receiver squelch echo control
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
US4650930A (en) * 1985-02-13 1987-03-17 Northern Telecom Limited Adaptive equalizer
JPH0616592B2 (ja) 1985-12-23 1994-03-02 富士通株式会社 Ｆｄｍモデム
US4742510A (en) * 1986-04-04 1988-05-03 Massachusetts Institute Of Technology Near and far echo canceller for data communications
US4771417A (en) * 1986-09-18 1988-09-13 Racal Data Communications, Inc. High speed modem
AU618522B2 (en) * 1987-01-13 1992-01-02 British Telecommunications Public Limited Company Transmission system
GB8700669D0 (en) * 1987-01-13 1987-02-18 British Telecomm Transmission system
US4970715A (en) * 1987-03-27 1990-11-13 Universal Data Systems, Inc. Modem with improved remote echo location and cancellation
US4995030A (en) * 1988-02-01 1991-02-19 Memotec Datacom, Inc. Far end echo cancellation method and apparatus
FR2628918B1 (fr) * 1988-03-15 1990-08-10 France Etat Dispositif annuleur d'echo a filtrage en sous-bandes de frequence
DE69125646T2 (de) * 1990-05-22 1997-10-23 Lg Electronics Inc Verfahren und Gerät zur Übertragung und zum Empfangen von Signalen in einem Bildtelefon
US5602869A (en) * 1993-10-18 1997-02-11 Paradyne Corporation Adaptive transmit levels for modems operating over cellular
US6246716B1 (en) * 1997-01-31 2001-06-12 Adtran, Inc. Information communication system
US6014371A (en) * 1997-03-05 2000-01-11 Paradyne Corporation Echo cancellation system and method for multipoint networks
EP1260033A1 (de) * 2000-02-21 2002-11-27 Surf Communication Solution, Ltd. Adaptiven echolöschung
US6804348B1 (en) * 2000-11-08 2004-10-12 Viadux, Inc. Circuit for echo-cancellation in an asymmetric, two-way time-and frequency-shared communication medium
US7260142B2 (en) * 2002-03-07 2007-08-21 Texas Instruments Incorporated Dynamic hybrid switching in a wireline modem
US8077642B2 (en) * 2007-12-28 2011-12-13 Intel Corporation Methods and apparatus for signal echo cancellation and transmitter calibration in full duplex systems
EP4057575B1 (de) 2021-03-10 2026-01-07 Infineon Technologies Americas Corp. Konfigurierbare übertragungsraten über eine zweiweg-ethernet-verbindung
US11784779B2 (en) * 2021-12-09 2023-10-10 Marvell Asia Pte Ltd Automotive asymmetric ethernet using a frequency-division duplex scheme with a low-rate echo cancelation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH398682A (de) * 1960-01-21 1966-03-15 Standard Telephon & Radio Ag Nachrichtenübertragungsanlage
US3655915A (en) * 1970-05-07 1972-04-11 Gen Datacomm Ind Inc Closed loop test method and apparatus for duplex data transmission modem
US4101833A (en) * 1977-03-07 1978-07-18 The Vadic Corporation Duplex data transmission modem utilizing an injected tone for shifting power within the transmit spectrum
DE2916576C3 (de) * 1979-04-24 1981-12-10 Siemens AG, 1000 Berlin und 8000 München Digital-Fernmeldesystem für Zweidraht-Getrenntlage-Betrieb

Also Published As

Publication number Publication date
FI831046A7 (fi) 1983-10-02
FR2524742A1 (fr) 1983-10-07
GB2117606A (en) 1983-10-12
US4481622A (en) 1984-11-06
FI831046A0 (fi) 1983-03-28
JPS58173937A (ja) 1983-10-12
FI831046L (fi) 1983-10-02
GB2117606B (en) 1986-01-15
EP0091014A2 (de) 1983-10-12
NO831190L (no) 1983-10-03
CA1184684A (en) 1985-03-26
DE3238818A1 (de) 1983-10-13
DK137883D0 (da) 1983-03-25
EP0091014A3 (de) 1984-02-01

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Legal Events

Date Code Title Description
AHB Application shelved due to non-payment