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BE890402A - Circuit de ligne de telecommunication - Google Patents

Circuit de ligne de telecommunication

Info

Publication number
BE890402A
BE890402A BE2/59365A BE2059365A BE890402A BE 890402 A BE890402 A BE 890402A BE 2/59365 A BE2/59365 A BE 2/59365A BE 2059365 A BE2059365 A BE 2059365A BE 890402 A BE890402 A BE 890402A
Authority
BE
Belgium
Prior art keywords
line circuit
telecommunication line
telecommunication
circuit
line
Prior art date
Application number
BE2/59365A
Other languages
English (en)
Inventor
A W Sweet
Original Assignee
Standard Telephones Cables Ltd
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 Standard Telephones Cables Ltd filed Critical Standard Telephones Cables Ltd
Publication of BE890402A publication Critical patent/BE890402A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • 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
    • H04M19/008—Using DC/DC converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Devices For Supply Of Signal Current (AREA)
  • Interface Circuits In Exchanges (AREA)
BE2/59365A 1979-11-29 1981-09-18 Circuit de ligne de telecommunication BE890402A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7941245A GB2064915B (en) 1979-11-29 1979-11-29 Telephone line feed circuit

Publications (1)

Publication Number Publication Date
BE890402A true BE890402A (fr) 1982-01-18

Family

ID=10509491

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2/59365A BE890402A (fr) 1979-11-29 1981-09-18 Circuit de ligne de telecommunication

Country Status (13)

Country Link
US (1) US4345117A (fr)
JP (1) JPS5690671A (fr)
AU (1) AU535131B2 (fr)
BE (1) BE890402A (fr)
FR (1) FR2471100B1 (fr)
GB (1) GB2064915B (fr)
IE (1) IE50881B1 (fr)
IT (1) IT1134498B (fr)
NL (1) NL8006307A (fr)
NZ (1) NZ195574A (fr)
PT (1) PT72123B (fr)
SE (1) SE8008104L (fr)
ZA (1) ZA807308B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2066023B (en) * 1979-12-13 1983-11-09 Standard Telephones Cables Ltd Telephone line interface
DE3264466D1 (en) * 1981-01-28 1985-08-08 Hitachi Ltd Current supply circuit
JPS57154965A (en) * 1981-03-19 1982-09-24 Fujitsu Ltd Constant current source type filter having self-bias function
SE431704B (sv) * 1982-07-06 1984-02-20 Ericsson Telefon Ab L M Forfarande vid strommatning av en abonnentapparat fran en telefonvexel
SE433285B (sv) * 1982-09-22 1984-05-14 Ericsson Telefon Ab L M Anordning for strommatning av en abonnentapparat
US4577064A (en) * 1983-04-29 1986-03-18 Gte Lenkurt Incorporated Auto-balance circuit for battery feed in a telephone circuit
SE465799B (sv) * 1990-03-15 1991-10-28 Ericsson Telefon Ab L M Anordning foer reducerad effektmatning till en abonnentlinje

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3870896A (en) * 1972-10-30 1975-03-11 Lorain Prod Corp Controllable current source
FR2279287A1 (fr) * 1974-07-16 1976-02-13 Cit Alcatel Unite d'alimentation a intensite constante
US4037066A (en) * 1975-03-20 1977-07-19 Lorain Products Corporation Repeater for transmission lines
US4048552A (en) * 1976-02-12 1977-09-13 Bell Telephone Laboratories, Incorporated Digitally regulated inverter
US4142075A (en) * 1977-10-11 1979-02-27 Burr-Brown Research Corporation Interface circuit and method for telephone extension lines
US4268723A (en) * 1979-09-04 1981-05-19 Western Electric Company Circuits and methods for initializing the loop current of a telephone set

Also Published As

Publication number Publication date
NZ195574A (en) 1984-04-27
SE8008104L (sv) 1981-05-30
JPS5690671A (en) 1981-07-22
ZA807308B (en) 1981-11-25
FR2471100A1 (fr) 1981-06-12
GB2064915A (en) 1981-06-17
FR2471100B1 (fr) 1985-06-28
IT8026297A0 (it) 1980-11-28
GB2064915B (en) 1984-03-21
PT72123A (en) 1980-12-01
NL8006307A (nl) 1981-07-01
US4345117A (en) 1982-08-17
AU6462480A (en) 1981-06-04
AU535131B2 (en) 1984-03-01
IT1134498B (it) 1986-08-13
IE802484L (en) 1981-05-29
PT72123B (en) 1981-11-02
IE50881B1 (en) 1986-08-06

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Legal Events

Date Code Title Description
RE Patent lapsed

Owner name: STANDARD TELEPHONES AND CABLES LTD

Effective date: 19900930