ZA796287B - Line current feed circuits for telecommunication exchanges - Google Patents

Line current feed circuits for telecommunication exchanges

Info

Publication number
ZA796287B
ZA796287B ZA00796287A ZA796287A ZA796287B ZA 796287 B ZA796287 B ZA 796287B ZA 00796287 A ZA00796287 A ZA 00796287A ZA 796287 A ZA796287 A ZA 796287A ZA 796287 B ZA796287 B ZA 796287B
Authority
ZA
South Africa
Prior art keywords
line current
current feed
feed circuits
telecommunication exchanges
telecommunication
Prior art date
Application number
ZA00796287A
Inventor
John Spencer Arnold
Spencer Arnold John
Original Assignee
Plessey Handel Investment Ag
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 Plessey Handel Investment Ag filed Critical Plessey Handel Investment Ag
Publication of ZA796287B publication Critical patent/ZA796287B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/54—Circuits using the same frequency for two directions of communication
    • H04B1/58—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
    • H04B1/581—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa using a transformer
    • 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)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Telephonic Communication Services (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Devices For Supply Of Signal Current (AREA)
ZA00796287A 1978-12-30 1979-10-20 Line current feed circuits for telecommunication exchanges ZA796287B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7850384A GB2042848B (en) 1978-12-30 1978-12-30 Line current feed and hybrid arrangement (sytem x)

Publications (1)

Publication Number Publication Date
ZA796287B true ZA796287B (en) 1980-11-26

Family

ID=10502016

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA00796287A ZA796287B (en) 1978-12-30 1979-10-20 Line current feed circuits for telecommunication exchanges

Country Status (11)

Country Link
JP (1) JPS5593363A (en)
AU (1) AU5323179A (en)
BR (1) BR7907891A (en)
DE (1) DE2952259A1 (en)
FR (1) FR2445666A1 (en)
GB (1) GB2042848B (en)
IE (1) IE48895B1 (en)
NL (1) NL7909148A (en)
NZ (1) NZ192462A (en)
SE (1) SE7910670L (en)
ZA (1) ZA796287B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3007791A1 (en) * 1980-02-29 1981-09-10 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR INCREASING THE INDUCTIVITY OF A TRANSMITTER
DE3278899D1 (en) * 1981-04-06 1988-09-15 Northern Telecom Ltd Apparatus for coupling signals to or from a two-wire line
DE3138726A1 (en) * 1981-09-29 1983-04-07 Siemens AG, 1000 Berlin und 8000 München Subscriber connection circuit for connecting two-wire subscriber connection lines to a four-wire through-connecting digital time division multiplex exchange
FR2552288B1 (en) * 1983-09-15 1989-03-24 Telecommunications Sa TELEPHONE SUBSCRIBER
US4595802A (en) * 1983-11-29 1986-06-17 Northern Telecom Limited Hybrid circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2063475A5 (en) * 1969-10-17 1971-07-09 Labo Cent Telecommunicat
FR2131038A5 (en) * 1971-03-30 1972-11-10 Ass Ouvriers Instr Preci
FR2166696A5 (en) * 1972-01-04 1973-08-17 Ass Ouvriers Instr Preci
US3955052A (en) * 1974-11-18 1976-05-04 Tadiran Israel Electronics Industries Ltd. Subscriber unit particularly useful for time-division-multiplex system

Also Published As

Publication number Publication date
IE48895B1 (en) 1985-06-12
NL7909148A (en) 1980-07-02
GB2042848A (en) 1980-09-24
BR7907891A (en) 1980-07-29
FR2445666A1 (en) 1980-07-25
IE792528L (en) 1980-06-30
SE7910670L (en) 1980-07-01
GB2042848B (en) 1983-01-06
AU5323179A (en) 1980-07-03
JPS5593363A (en) 1980-07-15
FR2445666B1 (en) 1984-10-12
NZ192462A (en) 1982-05-25
DE2952259A1 (en) 1980-07-17

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