KR840005636A - 전화교환국으로부터 가입자전화에 전류를 공급하는 방법 - Google Patents

전화교환국으로부터 가입자전화에 전류를 공급하는 방법 Download PDF

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Publication number
KR840005636A
KR840005636A KR1019830002975A KR830002975A KR840005636A KR 840005636 A KR840005636 A KR 840005636A KR 1019830002975 A KR1019830002975 A KR 1019830002975A KR 830002975 A KR830002975 A KR 830002975A KR 840005636 A KR840005636 A KR 840005636A
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KR
South Korea
Prior art keywords
telephone
power source
voltage
switching center
current
Prior art date
Application number
KR1019830002975A
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English (en)
Other versions
KR870000076B1 (ko
Inventor
햐르마 요한슨(외 1) 얀
Original Assignee
칼-엑셀 루우넬·벵트 겜스로오프
테레포오낙티이에보라겟트 엘, 엘. 엘리크썬
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.)
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Publication date
Application filed by 칼-엑셀 루우넬·벵트 겜스로오프, 테레포오낙티이에보라겟트 엘, 엘. 엘리크썬 filed Critical 칼-엑셀 루우넬·벵트 겜스로오프
Publication of KR840005636A publication Critical patent/KR840005636A/ko
Application granted granted Critical
Publication of KR870000076B1 publication Critical patent/KR870000076B1/ko

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Classifications

    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Devices For Supply Of Signal Current (AREA)

Abstract

내용 없음

Description

전화교환국으로 부터 가입자전화에 전류를 공급하는 방법
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 일실시예의 표시도.

Claims (1)

  1. 전원이 교환국에 배치되고 제1과 제2의 극을 가진 전화교환국부터 가입자 전화에 전류를 공급하는데 있어서,
    (1) 전원의 양극간의 전위치가 차동증폭기의 도움으로 감지되고,
    (2) 증폭기의 출력전압은 가로신호 성분을 제거하게 저주파 통과필터기에서 필터되고,
    (3) 기준전압이 시스템에 대한 기준치를 형성하기 위하여 저주파통과필터 전압에 부가되고 상기 기준전압은 한 극의 전위의 평균치의 크기를 구성하고,
    (4) 전원의 양극전위의 산술평균치가 시스템의 대응작용치를 형성하게 전압분할기의 도움을 가지고 감지되고,
    (5) 작용 및 기준치 간의 차이가 전원의 양극부터 같은 위상으로 취한 전류를 제어하는 것을 특징으로 하는 전화교환국으로 부터 가입자전화에 전류를 공급하는 방법.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019830002975A 1982-07-06 1983-06-30 전화교환국으로부터 가입자전화기에 전류를 공급하는 방법 KR870000076B1 (ko)

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
SE8204185-6 1982-07-06

Publications (2)

Publication Number Publication Date
KR840005636A true KR840005636A (ko) 1984-11-14
KR870000076B1 KR870000076B1 (ko) 1987-02-09

Family

ID=20347308

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019830002975A KR870000076B1 (ko) 1982-07-06 1983-06-30 전화교환국으로부터 가입자전화기에 전류를 공급하는 방법

Country Status (9)

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

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
CA1171989A (en) * 1981-02-17 1984-07-31 Denis W. Aull Battery feed circuit
US4419542A (en) * 1982-05-17 1983-12-06 Bell Telephone Laboratories, Incorporated Battery feed circuit

Also Published As

Publication number Publication date
SE8204185L (sv) 1984-01-07
AU1775983A (en) 1984-02-08
EP0113747B1 (en) 1986-09-10
WO1984000459A1 (en) 1984-02-02
IT1164296B (it) 1987-04-08
IT8321935A1 (it) 1985-01-05
DE3366051D1 (en) 1986-10-16
JPS59501241A (ja) 1984-07-12
KR870000076B1 (ko) 1987-02-09
SE8204185D0 (sv) 1982-07-06
AU554907B2 (en) 1986-09-04
SE431704B (sv) 1984-02-20
US4617426A (en) 1986-10-14
EP0113747A1 (en) 1984-07-25
IT8321935A0 (it) 1983-07-05
JPH0462218B2 (ko) 1992-10-05

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