ES396581A1 - Telephone intercommunication system - Google Patents

Telephone intercommunication system

Info

Publication number
ES396581A1
ES396581A1 ES396581A ES396581A ES396581A1 ES 396581 A1 ES396581 A1 ES 396581A1 ES 396581 A ES396581 A ES 396581A ES 396581 A ES396581 A ES 396581A ES 396581 A1 ES396581 A1 ES 396581A1
Authority
ES
Spain
Prior art keywords
station
circuit
stations
generator
individual
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
ES396581A
Other languages
Spanish (es)
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.)
Nokia Spain SA
Original Assignee
Alcatel Espana SA
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 Alcatel Espana SA filed Critical Alcatel Espana SA
Publication of ES396581A1 publication Critical patent/ES396581A1/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
    • H04Q3/521—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements using semiconductors in the switching stages

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Function (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)

Abstract

A telephone intercom system with a plurality of stations, an individual line circuit for each station, a conversation circuit interposed between said line circuits of a calling station and a called station of said stations, an individual current generator for each station connected to said talk path, a ground connection from said talk path within said connection circuit, and means associated with each current generator to limit the current of each generator to a predetermined value. (Machine-translation by Google Translate, not legally binding)
ES396581A 1970-11-02 1971-11-02 Telephone intercommunication system Expired ES396581A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA097,178A CA963133A (en) 1970-11-02 1970-11-02 Telephone intercommunicating system

Publications (1)

Publication Number Publication Date
ES396581A1 true ES396581A1 (en) 1974-05-16

Family

ID=4087932

Family Applications (1)

Application Number Title Priority Date Filing Date
ES396581A Expired ES396581A1 (en) 1970-11-02 1971-11-02 Telephone intercommunication system

Country Status (6)

Country Link
AU (1) AU464115B2 (en)
BE (1) BE774799A (en)
CA (1) CA963133A (en)
DE (1) DE2154237C3 (en)
ES (1) ES396581A1 (en)
GB (2) GB1360508A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5940358B2 (en) * 1978-10-18 1984-09-29 日本電信電話株式会社 Call path switch circuit
DE3215757A1 (en) * 1982-04-28 1983-11-03 Krone Gmbh, 1000 Berlin Internal connection switch for in-house telephone or PABX telecommunications systems

Also Published As

Publication number Publication date
DE2154237B2 (en) 1975-01-16
GB1360508A (en) 1974-07-17
DE2154237C3 (en) 1975-09-04
AU3521271A (en) 1973-05-10
CA963133A (en) 1975-02-18
GB1360509A (en) 1974-07-17
BE774799A (en) 1972-03-01
DE2154237A1 (en) 1972-05-04
AU464115B2 (en) 1975-08-14

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