DE3366051D1 - A method for current supply to a subscriber telephone from a telephone exchange - Google Patents

A method for current supply to a subscriber telephone from a telephone exchange

Info

Publication number
DE3366051D1
DE3366051D1 DE8383902302T DE3366051T DE3366051D1 DE 3366051 D1 DE3366051 D1 DE 3366051D1 DE 8383902302 T DE8383902302 T DE 8383902302T DE 3366051 T DE3366051 T DE 3366051T DE 3366051 D1 DE3366051 D1 DE 3366051D1
Authority
DE
Germany
Prior art keywords
telephone
current supply
subscriber
exchange
telephone exchange
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.)
Expired
Application number
DE8383902302T
Other languages
English (en)
Inventor
Jan Johansson
Nils Sundvall
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
Application granted granted Critical
Publication of DE3366051D1 publication Critical patent/DE3366051D1/de
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/06—Current supply arrangements for telephone systems in which current supply sources at subordinate switching centres are charged from the main exchange

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)
DE8383902302T 1982-07-06 1983-06-14 A method for current supply to a subscriber telephone from a telephone exchange Expired DE3366051D1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8204185A SE431704B (sv) 1982-07-06 1982-07-06 Forfarande vid strommatning av en abonnentapparat fran en telefonvexel
PCT/SE1983/000242 WO1984000459A1 (en) 1982-07-06 1983-06-14 A method for current supply to a subscriber telephone from a telephone exchange

Publications (1)

Publication Number Publication Date
DE3366051D1 true DE3366051D1 (en) 1986-10-16

Family

ID=20347308

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8383902302T Expired DE3366051D1 (en) 1982-07-06 1983-06-14 A method for current supply to a subscriber telephone from a telephone exchange

Country Status (9)

Country Link
US (1) US4617426A (de)
EP (1) EP0113747B1 (de)
JP (1) JPS59501241A (de)
KR (1) KR870000076B1 (de)
AU (1) AU554907B2 (de)
DE (1) DE3366051D1 (de)
IT (1) IT1164296B (de)
SE (1) SE431704B (de)
WO (1) WO1984000459A1 (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0744286B2 (ja) * 1986-03-04 1995-05-15 三菱電機株式会社 非晶質光発電素子モジュールの製造方法
SE465799B (sv) * 1990-03-15 1991-10-28 Ericsson Telefon Ab L M Anordning foer reducerad effektmatning till en abonnentlinje
US5404771A (en) * 1993-05-25 1995-04-11 Soma; David N. Device for disposing the toe clips on bicycle pedals in upright operative positions when the toe clips are not engaged by the cyclists shoes
SE501975C2 (sv) * 1993-11-09 1995-07-03 Ericsson Telefon Ab L M Gränssnittskrets mellan fyrtrådsledning och tvåtrådsledning
SE9400186D0 (sv) * 1994-01-21 1994-01-21 Ericsson Telefon Ab L M Förfarande i ett telekommunikationssystem
US5649009A (en) * 1994-11-14 1997-07-15 Harris Corporation Differential longitudinal amplifier for a subscriber line interface circuit
GB2315188B (en) * 1996-07-09 1999-04-14 Telspec Plc Power supply system for telephone line wires
US20030072436A1 (en) * 2001-10-15 2003-04-17 Eckhoff Christopher D. Subscriber line interface circuitry with modified DC feed
US7116778B2 (en) * 2002-09-30 2006-10-03 Silicon Laboratories, Inc. Adaptive linefeed control for varying load on a subscriber loop

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3916110A (en) * 1974-05-02 1975-10-28 Gte Automatic Electric Lab Inc Line circuit employing constant current devices for battery feed
US4315106A (en) * 1979-11-28 1982-02-09 International Telephone And Telegraph Corporation Apparatus for regulating current supplied to a telephone line signal of the type employed in digital telephone systems
GB2064915B (en) * 1979-11-29 1984-03-21 Standard Telephones Cables Ltd Telephone line feed circuit
JPS6022571B2 (ja) * 1979-12-05 1985-06-03 株式会社日立製作所 地絡保護方式
GB2065418B (en) * 1979-12-06 1984-02-15 Standard Telephones Cables Ltd Telephone line feed
JPS5737966A (en) * 1980-08-15 1982-03-02 Nec Corp Compensating system for unbalance to earth
US4317963A (en) * 1980-09-22 1982-03-02 International Telephone And Telegraph Corporation Subscriber line interface circuit utilizing impedance synthesizer and shared voltage source for loop current regulation control
SE452385B (sv) * 1981-02-17 1987-11-23 Western Electric Co Batterimatningskrets
US4419542A (en) * 1982-05-17 1983-12-06 Bell Telephone Laboratories, Incorporated Battery feed circuit

Also Published As

Publication number Publication date
EP0113747A1 (de) 1984-07-25
AU1775983A (en) 1984-02-08
KR840005636A (ko) 1984-11-14
US4617426A (en) 1986-10-14
WO1984000459A1 (en) 1984-02-02
KR870000076B1 (ko) 1987-02-09
SE8204185D0 (sv) 1982-07-06
AU554907B2 (en) 1986-09-04
SE8204185L (sv) 1984-01-07
JPS59501241A (ja) 1984-07-12
JPH0462218B2 (de) 1992-10-05
IT8321935A1 (it) 1985-01-05
SE431704B (sv) 1984-02-20
EP0113747B1 (de) 1986-09-10
IT1164296B (it) 1987-04-08
IT8321935A0 (it) 1983-07-05

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition