AU1957688A - Apparatus for achieving a controllable line termination impedance - Google Patents

Apparatus for achieving a controllable line termination impedance

Info

Publication number
AU1957688A
AU1957688A AU19576/88A AU1957688A AU1957688A AU 1957688 A AU1957688 A AU 1957688A AU 19576/88 A AU19576/88 A AU 19576/88A AU 1957688 A AU1957688 A AU 1957688A AU 1957688 A AU1957688 A AU 1957688A
Authority
AU
Australia
Prior art keywords
achieving
line termination
termination impedance
controllable line
controllable
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.)
Abandoned
Application number
AU19576/88A
Inventor
Anders Gunnar Eriksson
Nils-Olof Johannesson
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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 Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of AU1957688A publication Critical patent/AU1957688A/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • 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
AU19576/88A 1987-06-15 1988-05-18 Apparatus for achieving a controllable line termination impedance Abandoned AU1957688A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8702486 1987-06-15
SE8702486A SE457923B (en) 1987-06-15 1987-06-15 DEVICE TO ACHIEVE A CONTROLLABLE LINE CUT IMPEDANCE

Publications (1)

Publication Number Publication Date
AU1957688A true AU1957688A (en) 1989-01-19

Family

ID=20368864

Family Applications (1)

Application Number Title Priority Date Filing Date
AU19576/88A Abandoned AU1957688A (en) 1987-06-15 1988-05-18 Apparatus for achieving a controllable line termination impedance

Country Status (7)

Country Link
EP (1) EP0321540A1 (en)
AU (1) AU1957688A (en)
ES (1) ES2008537A6 (en)
GR (1) GR880100377A (en)
PT (1) PT87686A (en)
SE (1) SE457923B (en)
WO (1) WO1988010539A1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5073924A (en) * 1990-05-01 1991-12-17 Frisby Kenneth G Telephone line noise filter apparatus
JPH04280597A (en) * 1991-03-08 1992-10-06 Nec Corp Subscriber circuit
IT1259009B (en) * 1992-07-24 1996-03-11 Italtel Telematica METHOD AND DEVICE FOR THE ADAPTATION OF USER TERMINATION IMPEDANCES AND USER ATTACK TO THE CHARACTERISTIC IMPEDANCE OF THE USER TELEPHONE LINE
EP0642229B1 (en) * 1993-09-02 1999-11-24 Siemens Aktiengesellschaft Circuit for generating a variable line termination impedance
AU681169B2 (en) * 1993-10-01 1997-08-21 Alcatel Australia Limited Line termination circuit
JPH0851651A (en) * 1994-06-24 1996-02-20 Harris Corp Subscriber's line interface circuit,impedance matching method and echo canceling method between hybrids
US5583934A (en) * 1995-03-03 1996-12-10 Advanced Micro Devices, Inc. DC level control for an electronic telephone line card
SE511825C2 (en) * 1998-03-31 1999-12-06 Ericsson Telefon Ab L M Method and apparatus in an analog line circuit
KR100408739B1 (en) * 2001-12-04 2003-12-11 엘지이노텍 주식회사 Analog slic circuit for board of switch board subscriber
US7062037B2 (en) 2002-04-30 2006-06-13 Texas Instruments Incorporated Generic line impedance matching circuit using decomposed configurable transfer functions

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU536210B2 (en) * 1980-06-18 1984-04-19 Telefonaktiebolaget Lm Ericsson (Publ) Subscriber line audio processing circuit apparatus
JPS5895488A (en) * 1981-12-02 1983-06-07 Hitachi Ltd Line circuit
EP0163298B1 (en) * 1984-05-30 1992-09-30 Hitachi, Ltd. Pcm coder/decoder with two-wire/four-wire conversion
GB8528843D0 (en) * 1985-11-22 1985-12-24 British Telecomm Codec

Also Published As

Publication number Publication date
WO1988010539A1 (en) 1988-12-29
SE8702486L (en) 1988-12-16
SE8702486D0 (en) 1987-06-15
SE457923B (en) 1989-02-06
ES2008537A6 (en) 1989-07-16
GR880100377A (en) 1989-03-08
EP0321540A1 (en) 1989-06-28
PT87686A (en) 1989-05-31

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