CH586983A5 - - Google Patents

Info

Publication number
CH586983A5
CH586983A5 CH1721974A CH1721974A CH586983A5 CH 586983 A5 CH586983 A5 CH 586983A5 CH 1721974 A CH1721974 A CH 1721974A CH 1721974 A CH1721974 A CH 1721974A CH 586983 A5 CH586983 A5 CH 586983A5
Authority
CH
Switzerland
Application number
CH1721974A
Original Assignee
Ibm
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 Ibm filed Critical Ibm
Priority to CH1721974A priority Critical patent/CH586983A5/xx
Priority to GB4527475A priority patent/GB1489143A/en
Priority to FR7535237A priority patent/FR2296325A1/fr
Priority to DE19752551916 priority patent/DE2551916C3/de
Priority to JP50150691A priority patent/JPS5929985B2/ja
Publication of CH586983A5 publication Critical patent/CH586983A5/xx

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
    • H04M19/005—Feeding arrangements without the use of line transformers

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
CH1721974A 1974-12-23 1974-12-23 CH586983A5 (es)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CH1721974A CH586983A5 (es) 1974-12-23 1974-12-23
GB4527475A GB1489143A (en) 1974-12-23 1975-10-31 Subscriber line interface circuit
FR7535237A FR2296325A1 (fr) 1974-12-23 1975-11-10 Procede pour la reduction de la dissipation de la puissance d'alimentation dans le circuit d'abonnes d'un systeme de communication et agencement pour la mise en oeuvre de ce procede
DE19752551916 DE2551916C3 (de) 1974-12-23 1975-11-19 Verfahren und Anordnung zur Verminderung der Speisestromverlustleistung bei Teilnehmeranschlüssen einer Nachrichtenvermittlungsanlage
JP50150691A JPS5929985B2 (ja) 1974-12-23 1975-12-19 加入者回線インタ−フエイス回路

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1721974A CH586983A5 (es) 1974-12-23 1974-12-23

Publications (1)

Publication Number Publication Date
CH586983A5 true CH586983A5 (es) 1977-04-15

Family

ID=4423686

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1721974A CH586983A5 (es) 1974-12-23 1974-12-23

Country Status (5)

Country Link
JP (1) JPS5929985B2 (es)
CH (1) CH586983A5 (es)
DE (1) DE2551916C3 (es)
FR (1) FR2296325A1 (es)
GB (1) GB1489143A (es)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2655005C3 (de) * 1976-12-02 1980-04-17 Deutsche Telephonwerke Und Kabelindustrie Ag, 1000 Berlin Schaltungsanordnung für eine elektronische Teilnehmerspeisung
NL7614118A (nl) * 1976-12-20 1978-06-22 Philips Nv Schakeling voor het beschermen van telefoon- lijnen.
JPS54151307A (en) * 1978-05-19 1979-11-28 Nec Corp Supply circuit for communication current
US4254305A (en) * 1979-02-07 1981-03-03 International Telephone And Telegraph Corporation Current limited subscriber line feed circuit
NL7903663A (nl) * 1979-05-10 1980-11-12 Philips Nv Versterker voor toepassing in een lijncircuit.
NL7903664A (nl) * 1979-05-10 1980-11-12 Philips Nv Lijncircuit.
NL7903662A (nl) * 1979-05-10 1980-11-12 Philips Nv Lijncircuit.
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
GB2065418B (en) * 1979-12-06 1984-02-15 Standard Telephones Cables Ltd Telephone line feed
DE3369445D1 (en) * 1982-02-25 1987-02-26 Siemens Ag Circuit arrangement for telecommunication installations, especially for telephone exchange installations, with direct voltage converters
JPS5983452A (ja) * 1982-11-05 1984-05-14 Fujitsu Ltd 交換機に於ける直流電流供給方式
IT1214603B (it) * 1985-04-30 1990-01-18 Ates Componenti Elettron Circuito telefonico, integrabile monoliticamente, perl'alimentazione di una linea telefonica d'utente.
SE465799B (sv) * 1990-03-15 1991-10-28 Ericsson Telefon Ab L M Anordning foer reducerad effektmatning till en abonnentlinje
US5103387A (en) * 1991-01-31 1992-04-07 Northern Telecom Limited High voltage converter
DE4139608A1 (de) * 1991-11-30 1993-06-03 Siemens Nixdorf Inf Syst Verfahren zur versorgungsspannungseinstellung der speiseeinrichtung von teilnehmeranschlussschaltungen
JPH0821997B2 (ja) * 1992-04-03 1996-03-04 ノーザン・テレコム・リミテッド ２線式電話機ライン用インタフェース回路
DE4233682A1 (de) * 1992-10-02 1994-04-07 Deutsche Telephonwerk Kabel Schaltungsanordnung für die Speisung von digitalen Einrichtungen
CN105812590B (zh) * 2016-05-11 2018-10-12 福建星网智慧科技股份有限公司 一种用于用户线路长短线馈电的切换方法

Also Published As

Publication number Publication date
DE2551916B2 (de) 1981-07-02
DE2551916A1 (de) 1976-11-04
JPS5186908A (ja) 1976-07-30
FR2296325A1 (fr) 1976-07-23
GB1489143A (en) 1977-10-19
DE2551916C3 (de) 1982-02-25
JPS5929985B2 (ja) 1984-07-24
FR2296325B1 (es) 1981-03-06

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Legal Events

Date Code Title Description
PL Patent ceased