ES432840A1 - Perfeccionamientos en estaciones telefonicas de abonados. - Google Patents

Perfeccionamientos en estaciones telefonicas de abonados.

Info

Publication number
ES432840A1
ES432840A1 ES432840A ES432840A ES432840A1 ES 432840 A1 ES432840 A1 ES 432840A1 ES 432840 A ES432840 A ES 432840A ES 432840 A ES432840 A ES 432840A ES 432840 A1 ES432840 A1 ES 432840A1
Authority
ES
Spain
Prior art keywords
communication
relay
conductors
winding
condition
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
Application number
ES432840A
Other languages
English (en)
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of ES432840A1 publication Critical patent/ES432840A1/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/006—Exchange line circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Interface Circuits In Exchanges (AREA)
ES432840A 1973-12-12 1974-12-12 Perfeccionamientos en estaciones telefonicas de abonados. Expired ES432840A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US426648A US3916116A (en) 1973-12-12 1973-12-12 Hold bridge circuit

Publications (1)

Publication Number Publication Date
ES432840A1 true ES432840A1 (es) 1976-11-01

Family

ID=23691644

Family Applications (1)

Application Number Title Priority Date Filing Date
ES432840A Expired ES432840A1 (es) 1973-12-12 1974-12-12 Perfeccionamientos en estaciones telefonicas de abonados.

Country Status (12)

Country Link
US (1) US3916116A (es)
JP (1) JPS584508B2 (es)
BE (1) BE823214A (es)
CA (1) CA1006995A (es)
CH (1) CH594335A5 (es)
DE (1) DE2458298C2 (es)
ES (1) ES432840A1 (es)
FR (1) FR2254920B1 (es)
GB (1) GB1490869A (es)
IT (1) IT1026881B (es)
NL (1) NL177547C (es)
SE (1) SE7415136L (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5184504A (es) * 1975-01-21 1976-07-23 Iwatsu Electric Co Ltd
JPS52111302A (en) * 1976-03-15 1977-09-19 Taiko Denki Seisakusho:Kk Connecting system of button telephone set
US4132860A (en) * 1977-08-01 1979-01-02 Crest Industries, Inc. Hold control for a key telephone system
WO1979000078A1 (en) * 1977-08-01 1979-02-22 H Rasmussen Hold control for a key telephone system

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2862062A (en) * 1956-05-22 1958-11-25 Bell Telephone Labor Inc Holding arrangement for universaltype line circuit
US3283083A (en) * 1963-03-13 1966-11-01 American Telephone & Telegraph Telephone subscriber's line circuit
US3436488A (en) * 1966-03-17 1969-04-01 Bell Telephone Labor Inc Line circuit for a key telephone system utilizing a single multifunction supervisory relay
DE1562142C3 (de) * 1968-02-29 1975-05-15 Siemens Ag, 1000 Berlin U. 8000 Muenchen Schaltungsanordnung für Chef-Sekretärstationen in Fernsprechnebenstellenanlagen
IL30070A (en) * 1968-05-24 1971-05-26 Telrad Telecommunication & Ele Line grip circuit for multi-line telephone system
JPS4932003B1 (es) * 1969-03-31 1974-08-27
US3725600A (en) * 1969-12-18 1973-04-03 American Telephone & Telegraph Communication call holding circuit
US3733442A (en) * 1971-01-18 1973-05-15 Northern Electric Co Hold circuit for multi-line key telephone system
US3764752A (en) * 1972-01-11 1973-10-09 Teltronics Inc Telephone line card system

Also Published As

Publication number Publication date
NL177547B (nl) 1985-05-01
FR2254920A1 (es) 1975-07-11
US3916116A (en) 1975-10-28
DE2458298C2 (de) 1984-04-26
CH594335A5 (es) 1978-01-13
NL177547C (nl) 1985-10-01
BE823214A (fr) 1975-04-01
AU7613474A (en) 1976-06-10
JPS584508B2 (ja) 1983-01-26
IT1026881B (it) 1978-10-20
SE7415136L (es) 1975-06-13
CA1006995A (en) 1977-03-15
JPS5092613A (es) 1975-07-24
DE2458298A1 (de) 1975-06-19
FR2254920B1 (es) 1977-04-08
GB1490869A (en) 1977-11-02
NL7416124A (nl) 1975-06-16

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