BR7806929A - Circuito de controle para posto telefonico de assinante - Google Patents

Circuito de controle para posto telefonico de assinante

Info

Publication number
BR7806929A
BR7806929A BR7806929A BR7806929A BR7806929A BR 7806929 A BR7806929 A BR 7806929A BR 7806929 A BR7806929 A BR 7806929A BR 7806929 A BR7806929 A BR 7806929A BR 7806929 A BR7806929 A BR 7806929A
Authority
BR
Brazil
Prior art keywords
control circuit
subscriber phone
phone station
station
subscriber
Prior art date
Application number
BR7806929A
Other languages
English (en)
Inventor
F Ahmed
J Barsellotti
Original Assignee
Int Standard Electric Corp
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 Int Standard Electric Corp filed Critical Int Standard Electric Corp
Publication of BR7806929A publication Critical patent/BR7806929A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
BR7806929A 1977-10-24 1978-10-20 Circuito de controle para posto telefonico de assinante BR7806929A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA289313 1977-10-24

Publications (1)

Publication Number Publication Date
BR7806929A true BR7806929A (pt) 1979-05-08

Family

ID=4109833

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7806929A BR7806929A (pt) 1977-10-24 1978-10-20 Circuito de controle para posto telefonico de assinante

Country Status (3)

Country Link
US (1) US4221935A (pt)
AU (1) AU4082978A (pt)
BR (1) BR7806929A (pt)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2451682A1 (fr) * 1979-03-12 1980-10-10 Jeumont Schneider Dispositif d'appel pour installation telephonique automatique d'abonne avec postes supplementaires
US4587380A (en) * 1984-06-14 1986-05-06 Harris Corporation Interface for connecting standard telephones to party lines
US4645877A (en) * 1984-06-14 1987-02-24 Harris Corporation Interface for connecting standard telephones to party lines
US4669111A (en) * 1984-07-20 1987-05-26 Om Ahuja Polarity ring director
US4653084A (en) * 1984-07-20 1987-03-24 Om Ahuja Remote actuated switch
DE19714452C2 (de) * 1997-04-08 2002-04-18 Deutsche Telekom Ag Vorrichtung und Verfahren zum gezielten Rufen einer analogen Kommunikations-Endeinrichtung
US6470083B1 (en) 1997-12-24 2002-10-22 Abb Automation Inc. Telecommunications off-hook and intrusion detection method and apparatus

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2874223A (en) * 1953-08-27 1959-02-17 Itt Mixed-ringing party-line telephone system
US2923776A (en) * 1956-12-14 1960-02-02 Gen Dynamics Corp Ringing code detector
US3026377A (en) * 1957-10-10 1962-03-20 Bell Telephone Labor Inc Compatible ringing circuit
US3566039A (en) * 1967-12-11 1971-02-23 Northern Electric Co Apparatus for supplying revertive ringing to a multiparty telephone line
CA888419A (en) * 1969-06-16 1971-12-14 Itt Canada Limited Selective code ringing
US3919487A (en) * 1974-06-14 1975-11-11 San Bar Corp Telephone instrument disconnect circuit

Also Published As

Publication number Publication date
US4221935A (en) 1980-09-09
AU4082978A (en) 1980-04-24

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