DE3774412D1 - Vorrichtung in einem fernuebertragungssystem fuer stromversorgung eines fernsprechersatzes. - Google Patents

Vorrichtung in einem fernuebertragungssystem fuer stromversorgung eines fernsprechersatzes.

Info

Publication number
DE3774412D1
DE3774412D1 DE8787902850T DE3774412T DE3774412D1 DE 3774412 D1 DE3774412 D1 DE 3774412D1 DE 8787902850 T DE8787902850 T DE 8787902850T DE 3774412 T DE3774412 T DE 3774412T DE 3774412 D1 DE3774412 D1 DE 3774412D1
Authority
DE
Germany
Prior art keywords
power supply
transmission system
telephone set
remote transmission
remote
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 - Lifetime
Application number
DE8787902850T
Other languages
English (en)
Inventor
Hans Vilhelm Johansson
Arne Olof Tage Rydin
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20364443&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=DE3774412(D1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Application granted granted Critical
Publication of DE3774412D1 publication Critical patent/DE3774412D1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/40—Applications of speech amplifiers
    • 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
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/001—Current supply source at the exchanger providing current to substations
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
DE8787902850T 1986-05-06 1987-04-28 Vorrichtung in einem fernuebertragungssystem fuer stromversorgung eines fernsprechersatzes. Expired - Lifetime DE3774412D1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8602080A SE453240B (sv) 1986-05-06 1986-05-06 Anordning i ett telekommunikationssystem for att strommata en telefonapparat
PCT/SE1987/000219 WO1987007104A1 (en) 1986-05-06 1987-04-28 Apparatus in a telecommunication system for supplying power to a telephone set

Publications (1)

Publication Number Publication Date
DE3774412D1 true DE3774412D1 (de) 1991-12-12

Family

ID=20364443

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787902850T Expired - Lifetime DE3774412D1 (de) 1986-05-06 1987-04-28 Vorrichtung in einem fernuebertragungssystem fuer stromversorgung eines fernsprechersatzes.

Country Status (7)

Country Link
US (1) US4961222A (de)
EP (1) EP0273922B1 (de)
JP (1) JP2744784B2 (de)
KR (1) KR910003495B1 (de)
DE (1) DE3774412D1 (de)
SE (1) SE453240B (de)
WO (1) WO1987007104A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5289359A (en) * 1991-02-13 1994-02-22 Charles Industries, Limited DC-DC power converter including sensing means for providing an output when the reserve power of the converter falls below a predetermined amount for a given input voltage
JP2905616B2 (ja) * 1991-05-20 1999-06-14 シャープ株式会社 通信端末装置
JPH0568120A (ja) * 1991-09-05 1993-03-19 Fujitsu Ltd 給電回路
SE501975C2 (sv) * 1993-11-09 1995-07-03 Ericsson Telefon Ab L M Gränssnittskrets mellan fyrtrådsledning och tvåtrådsledning
SE502276C2 (sv) * 1994-01-21 1995-09-25 Ericsson Telefon Ab L M Förfarande och anordning för generering av en ringsignal
SE9400186D0 (sv) * 1994-01-21 1994-01-21 Ericsson Telefon Ab L M Förfarande i ett telekommunikationssystem
JPH11514828A (ja) * 1996-09-03 1999-12-14 フィリップス エレクトロニクス ネムローゼ フェンノートシャップ 電子的なインピダンスの電源回路
FR2767933A1 (fr) * 1997-08-27 1999-02-26 Philips Electronics Nv Circuit adaptateur de tension d'alimentation
WO1999053627A1 (en) 1998-04-10 1999-10-21 Chrimar Systems, Inc. Doing Business As Cms Technologies System for communicating with electronic equipment on a network
US7103178B2 (en) * 2004-07-09 2006-09-05 Intersil Americas Inc. Speech amplifier-resident mechanism for controllably supplying power to a line circuit

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300023A (en) * 1979-08-13 1981-11-10 Motorola, Inc. Hybrid circuit
DE3007549A1 (de) * 1980-02-28 1981-09-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Anordnung zur speisung einer teilnehmereinrichtung
DE3007468A1 (de) * 1980-02-28 1981-09-10 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Teilnehmerspeiseanordnung
US4322586A (en) * 1980-11-13 1982-03-30 Northern Telecom Limited Transformerless line interface circuit
JPS57178470A (en) * 1981-04-28 1982-11-02 Hitachi Ltd Terminal feeding system
JPS5883492A (ja) * 1981-11-12 1983-05-19 Nec Corp 加入者回路の低電力化方式
US4600811A (en) * 1982-12-28 1986-07-15 Nec Corporation Subscriber line interface circuit
JPS615669A (ja) * 1984-06-14 1986-01-11 Fujitsu Ltd 加入者回路の定電流給電回路
JPS611159A (ja) * 1984-06-14 1986-01-07 Fujitsu Ltd 加入者回路の定電流給電回路
JPS611161A (ja) * 1984-06-14 1986-01-07 Fujitsu Ltd 給電回路制御方式
FR2577737B1 (fr) * 1985-02-15 1987-04-17 Thomson Csf Circuit d'interface de ligne d'abonne telephonique avec mode de veille a puissance reduite

Also Published As

Publication number Publication date
EP0273922B1 (de) 1991-11-06
US4961222A (en) 1990-10-02
JP2744784B2 (ja) 1998-04-28
SE453240B (sv) 1988-01-18
SE8602080L (sv) 1987-11-07
KR910003495B1 (ko) 1991-06-01
KR880701506A (ko) 1988-07-27
WO1987007104A1 (en) 1987-11-19
EP0273922A1 (de) 1988-07-13
JPS63503269A (ja) 1988-11-24
SE8602080D0 (sv) 1986-05-06

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee