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SE454929B - Digital telefonledningskrets som bildar ett grenssnitt mellan en fullduplex analogtelefonabonnentledning och ett digitalt omkopplingssystem - Google Patents

Digital telefonledningskrets som bildar ett grenssnitt mellan en fullduplex analogtelefonabonnentledning och ett digitalt omkopplingssystem

Info

Publication number
SE454929B
SE454929B SE8106159A SE8106159A SE454929B SE 454929 B SE454929 B SE 454929B SE 8106159 A SE8106159 A SE 8106159A SE 8106159 A SE8106159 A SE 8106159A SE 454929 B SE454929 B SE 454929B
Authority
SE
Sweden
Prior art keywords
digital
signal
filter
line circuit
telephone line
Prior art date
Application number
SE8106159A
Other languages
English (en)
Swedish (sv)
Other versions
SE8106159L (sv
Inventor
R Treiber
Original Assignee
Alcatel Nv
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 Nv filed Critical Alcatel Nv
Publication of SE8106159L publication Critical patent/SE8106159L/
Publication of SE454929B publication Critical patent/SE454929B/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/04—Control of transmission; Equalising
    • H04B3/06—Control of transmission; Equalising by the transmitted signal
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H17/00—Networks using digital techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/586—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using an electronic circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephonic Communication Services (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Semiconductor Integrated Circuits (AREA)
SE8106159A 1980-10-23 1981-10-19 Digital telefonledningskrets som bildar ett grenssnitt mellan en fullduplex analogtelefonabonnentledning och ett digitalt omkopplingssystem SE454929B (sv)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US06/199,806 US4381561A (en) 1980-10-23 1980-10-23 All digital LSI line circuit for analog lines

Publications (2)

Publication Number Publication Date
SE8106159L SE8106159L (sv) 1982-04-24
SE454929B true SE454929B (sv) 1988-06-06

Family

ID=22739102

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8106159A SE454929B (sv) 1980-10-23 1981-10-19 Digital telefonledningskrets som bildar ett grenssnitt mellan en fullduplex analogtelefonabonnentledning och ett digitalt omkopplingssystem

Country Status (29)

Country Link
US (1) US4381561A (no)
JP (1) JPS5799830A (no)
KR (1) KR830008570A (no)
AT (1) AT394295B (no)
AU (1) AU545842B2 (no)
BR (1) BR8106781A (no)
CA (1) CA1168775A (no)
CH (1) CH656272A5 (no)
DE (1) DE3141502A1 (no)
DK (1) DK466181A (no)
ES (1) ES506469A0 (no)
FI (1) FI813329L (no)
FR (1) FR2493083A1 (no)
GB (1) GB2107554B (no)
HK (1) HK58985A (no)
IL (1) IL63995A (no)
IN (1) IN155110B (no)
IT (1) IT1195220B (no)
MX (1) MX150411A (no)
NL (1) NL8104732A (no)
NO (1) NO157037C (no)
NZ (1) NZ198654A (no)
PH (1) PH17542A (no)
PL (1) PL138050B1 (no)
PT (1) PT73850B (no)
RO (1) RO84855B (no)
SE (1) SE454929B (no)
YU (1) YU253681A (no)
ZA (1) ZA816780B (no)

Families Citing this family (23)

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Publication number Priority date Publication date Assignee Title
DE3339695A1 (de) * 1983-11-03 1985-05-15 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co KG, 8510 Fürth Steuergeraet fuer telefon-zusatzeinrichtungen
US5408466A (en) * 1984-12-06 1995-04-18 Motorola, Inc. Duplex interconnect dispatch trunked radio
EP0286835B1 (de) * 1987-04-14 1992-01-15 Siemens Aktiengesellschaft Verfahren und Schaltungsanordnung zur Einstellung der Teilnehmerleitungs-Nachbildungsimpedanzen von programmierbaren Gabelschaltung
US4837780A (en) * 1987-07-27 1989-06-06 Northern Telecom Limited Transmit line buildout circuits
EP0347644B1 (de) * 1988-06-13 1994-02-16 Siemens Aktiengesellschaft Modular strukturiertes digitales Kommunikationssystem
DE3823914A1 (de) * 1988-07-14 1990-01-18 Siemens Ag Verfahren zum uebermitteln endgeraetebestimmender programmparameterdaten von einer kommunikationsanlage zu kommunikationsendgeraeten
DE3939906A1 (de) * 1989-12-02 1991-06-06 Rohde & Schwarz Frequenzfilter ersten oder hoeheren grades
DE59003360D1 (de) * 1990-03-27 1993-12-09 Siemens Ag Zweidraht-Vierdraht-Umsetzer.
EP0448754B1 (de) * 1990-03-27 1993-11-03 Siemens Aktiengesellschaft Zweidraht-Vierdraht-Umsetzer
US5282157A (en) * 1990-09-13 1994-01-25 Telecom Analysis Systems, Inc. Input impedance derived from a transfer network
DE4236272A1 (de) * 1992-10-27 1994-04-28 Siemens Ag Echokompensationsvorrichtung und 4/2-Drahtschnittstelle mit einer solchen Echokompensationsvorrichtung
DE4310558C2 (de) * 1993-03-31 2003-06-18 Siemens Ag Verfahren zum bedarfsgesteuerten Programmladen dezentraler Prozessoreinrichtungen in einem digitalen Kommunikationssystem
DE4411378C2 (de) * 1994-03-31 2003-06-18 Siemens Ag Steuerungsverfahren zur Abfrage von dezentralen Einrichtungen in einem digitalen Kommunikationssystem
DE19643900C1 (de) * 1996-10-30 1998-02-12 Ericsson Telefon Ab L M Nachfiltern von Hörsignalen, speziell von Sprachsignalen
US6198817B1 (en) 1998-01-23 2001-03-06 International Business Machines Corporation Communication interface having combined shaping of receive response and synthesized matching terminating impedances for different frequency bands and a design method therefor
US6181792B1 (en) 1998-01-23 2001-01-30 International Business Machines Corporation Communication interface having synthesized matching impedances for different frequency bands and a design method therefor
US6049574A (en) * 1998-04-17 2000-04-11 Trustees Of Tufts College Blind adaptive equalization using cost function that measures dissimilarity between the probability distributions of source and equalized signals
US6563924B1 (en) 1998-08-25 2003-05-13 Samsung Electronics Co., Ltd. Subscriber matching circuit for electronic exchange
US6751202B1 (en) * 1999-04-30 2004-06-15 3Com Corporation Filtered transmit cancellation in a full-duplex modem data access arrangement (DAA)
GB2362063A (en) * 2000-04-25 2001-11-07 Mitel Corp Connecting broadband voice and data signals to telephone systems
US6925171B2 (en) * 2001-06-04 2005-08-02 Texas Instruments Incorporated Universal impedance matching network for the subscriber line integrated circuits
US7212502B2 (en) * 2002-08-08 2007-05-01 General Instrument Corporation Method and apparatus for dynamically adapting telephony analog loss based on channel content
CN113934256B (zh) * 2021-10-29 2025-01-24 中国电子科技集团公司第五十四研究所 一种可变系数的微分方程光子计算求解系统

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3579109A (en) * 1969-04-02 1971-05-18 Gen Dynamics Corp Automatic equalizer for digital data transmission systems
US3633105A (en) * 1970-04-01 1972-01-04 Gte Automatic Electric Lab Inc Digital adaptive equalizer system
US3716807A (en) * 1971-05-24 1973-02-13 Ibm Recursive automatic equalizer and method of operation therefore
US3789560A (en) * 1971-08-20 1974-02-05 Round Eight Corp Square circle house or like building structure
IT1024828B (it) * 1974-11-15 1978-07-20 Oselt Centro Studi E Lab Telec Equalizzatore numerico per trasmissione di dati
JPS51132713A (en) * 1975-05-14 1976-11-18 Hitachi Ltd Time-division communication system
US4057696A (en) * 1976-08-09 1977-11-08 Bell Telephone Laboratories, Incorporated Recursive-like adaptive echo canceller
US4072830A (en) * 1976-10-04 1978-02-07 Bell Telephone Laboratories, Incorporated Variable phase shifter for adaptive echo cancellers
FR2370396A1 (fr) * 1976-11-09 1978-06-02 Cit Alcatel Ensemble d'egalisation autoadaptatif
GB1583634A (en) * 1977-03-02 1981-01-28 Int Standard Electric Corp Subscriber line/trunk circuit
GB2008903B (en) * 1977-08-17 1982-06-30 Gen Electric Co Ltd Amplifier arrangements
JPS54157407A (en) * 1978-06-02 1979-12-12 Hitachi Ltd Level control unit for time-division exchange
IT1115559B (it) * 1978-08-29 1986-02-03 Cselt Centro Studi Lab Telecom Procedimento e dispositivo per la cancellazione numerica dell eco
US4174470A (en) * 1978-10-10 1979-11-13 Bell Telephone Laboratories, Incorporated Electronic hybrid
US4273963A (en) * 1979-05-25 1981-06-16 Bell Telephone Laboratories, Incorporated Automatic equalization for digital transmission systems
US4320498A (en) * 1980-02-11 1982-03-16 Apple Computer, Inc. Auto balancing duplexer for communication lines
AU544141B2 (en) * 1980-06-18 1985-05-16 Advanced Micro Devices Inc. Interpolative encoder for subscriber line audio processing circuit apparatus

Also Published As

Publication number Publication date
NO813437L (no) 1982-04-26
SE8106159L (sv) 1982-04-24
GB2107554A (en) 1983-04-27
JPS5799830A (en) 1982-06-21
NO157037B (no) 1987-09-28
IT1195220B (it) 1988-10-12
US4381561A (en) 1983-04-26
KR830008570A (ko) 1983-12-10
NO157037C (no) 1988-01-13
PH17542A (en) 1984-09-19
PT73850B (en) 1983-04-14
DE3141502C2 (no) 1990-07-12
FR2493083A1 (fr) 1982-04-30
FR2493083B1 (no) 1985-02-22
PL233557A1 (no) 1982-08-02
IL63995A0 (en) 1982-01-31
GB2107554B (en) 1984-08-01
HK58985A (en) 1985-08-16
DK466181A (da) 1982-04-24
ZA816780B (en) 1983-01-26
FI813329L (fi) 1982-04-24
CH656272A5 (de) 1986-06-13
AU7652581A (en) 1982-04-29
RO84855B (ro) 1984-09-30
BR8106781A (pt) 1982-07-06
AU545842B2 (en) 1985-08-01
IN155110B (no) 1985-01-05
IL63995A (en) 1984-04-30
CA1168775A (en) 1984-06-05
DE3141502A1 (de) 1982-07-29
MX150411A (es) 1984-04-30
YU253681A (en) 1983-06-30
ATA451481A (de) 1991-08-15
ES8302982A1 (es) 1983-02-16
RO84855A (ro) 1984-08-17
NZ198654A (en) 1985-04-30
ES506469A0 (es) 1983-02-16
PT73850A (en) 1981-11-01
AT394295B (de) 1992-02-25
PL138050B1 (en) 1986-08-30
NL8104732A (nl) 1982-05-17
IT8124623A0 (it) 1981-10-22

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