CH586984A5 - - Google Patents

Info

Publication number
CH586984A5
CH586984A5 CH1722074A CH1722074A CH586984A5 CH 586984 A5 CH586984 A5 CH 586984A5 CH 1722074 A CH1722074 A CH 1722074A CH 1722074 A CH1722074 A CH 1722074A CH 586984 A5 CH586984 A5 CH 586984A5
Authority
CH
Switzerland
Application number
CH1722074A
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
Priority to FR939057D priority Critical patent/FR939057A/fr
Application filed by Ibm filed Critical Ibm
Priority to CH1722074A priority patent/CH586984A5/xx
Priority to GB4527575A priority patent/GB1481750A/en
Priority to FR7535236A priority patent/FR2296339A1/fr
Priority to DE19752551816 priority patent/DE2551816C3/de
Priority to IT2975975A priority patent/IT1049925B/it
Priority to JP15069275A priority patent/JPS5186904A/ja
Publication of CH586984A5 publication Critical patent/CH586984A5/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)
CH1722074A 1972-09-18 1974-12-23 CH586984A5 (it)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR939057D FR939057A (fr) 1972-09-18 1946-03-29 Redresseurs
CH1722074A CH586984A5 (it) 1974-12-23 1974-12-23
GB4527575A GB1481750A (en) 1974-12-23 1975-10-31 Subscriber line interface circuit
FR7535236A FR2296339A1 (fr) 1974-12-23 1975-11-10 Circuit d'interface de ligne d'abonne
DE19752551816 DE2551816C3 (de) 1974-12-23 1975-11-19 Teiinehmerleitungs-Anschlußschaltung
IT2975975A IT1049925B (it) 1974-12-23 1975-11-28 Circuito d interfaccia di linea di abbonato
JP15069275A JPS5186904A (ja) 1974-12-23 1975-12-19 Kanyushakaisenintaafueisukairo

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1722074A CH586984A5 (it) 1974-12-23 1974-12-23

Publications (1)

Publication Number Publication Date
CH586984A5 true CH586984A5 (it) 1977-04-15

Family

ID=4423697

Family Applications (1)

Application Number Title Priority Date Filing Date
CH1722074A CH586984A5 (it) 1972-09-18 1974-12-23

Country Status (6)

Country Link
JP (1) JPS5186904A (it)
CH (1) CH586984A5 (it)
DE (1) DE2551816C3 (it)
FR (1) FR2296339A1 (it)
GB (1) GB1481750A (it)
IT (1) IT1049925B (it)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5413715A (en) * 1977-07-01 1979-02-01 Nippon Telegr & Teleph Corp <Ntt> Four-wire switching system
JPS5494810A (en) * 1978-01-11 1979-07-26 Hitachi Ltd Supply system for channel current
JPS5494811A (en) * 1978-01-11 1979-07-26 Hitachi Ltd Supply system for channel current
FR2414832A1 (fr) * 1978-01-13 1979-08-10 Labo Cent Telecommunicat Pont d'alimentation pour ligne telephonique
IT1159706B (it) * 1978-06-02 1987-03-04 Cselt Centro Studi Lab Telecom Circuito telefonico elettronico di linea d'utente
NL7810086A (nl) * 1978-10-06 1980-04-09 Philips Nv Voedingsbrug voor een abonneestroomloop.
US4254305A (en) * 1979-02-07 1981-03-03 International Telephone And Telegraph Corporation Current limited subscriber line feed circuit
FR2460078B1 (fr) * 1979-06-25 1986-12-12 Trt Telecom Radio Electr Joncteur d'abonne electronique
CA1157175A (en) * 1981-02-20 1983-11-15 Mitel Corporation Power saving line circuit
DE3214624C2 (de) * 1982-04-20 1986-05-28 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Auswertung von Teilnehmerschleifenzuständen in Fernsprechanlagen, insbesondere in Fernsprechnebenstellenanlagen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3649769A (en) * 1970-10-28 1972-03-14 Gen Electric Circuit for supplying direct current to a telephone line

Also Published As

Publication number Publication date
FR2296339A1 (fr) 1976-07-23
JPS5186904A (ja) 1976-07-30
FR2296339B1 (it) 1981-12-31
JPS5619784B2 (it) 1981-05-09
DE2551816C3 (de) 1980-10-30
IT1049925B (it) 1981-02-10
DE2551816A1 (de) 1976-06-24
GB1481750A (en) 1977-08-03
DE2551816B2 (de) 1979-06-13

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Legal Events

Date Code Title Description
PL Patent ceased