CA947851A - Selective signaling system - Google Patents

Selective signaling system

Info

Publication number
CA947851A
CA947851A CA113,796A CA113796A CA947851A CA 947851 A CA947851 A CA 947851A CA 113796 A CA113796 A CA 113796A CA 947851 A CA947851 A CA 947851A
Authority
CA
Canada
Prior art keywords
signaling system
selective signaling
selective
signaling
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
CA113,796A
Other versions
CA113796S (en
Inventor
Ronald J. Angner
Anthony Koscinski
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
Application granted granted Critical
Publication of CA947851A publication Critical patent/CA947851A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/68—Circuit arrangements for preventing eavesdropping
    • H04M1/70—Lock-out or secrecy arrangements in party-line systems
    • 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
CA113,796A 1970-10-05 1971-05-25 Selective signaling system Expired CA947851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7805370A 1970-10-05 1970-10-05

Publications (1)

Publication Number Publication Date
CA947851A true CA947851A (en) 1974-05-21

Family

ID=22141632

Family Applications (1)

Application Number Title Priority Date Filing Date
CA113,796A Expired CA947851A (en) 1970-10-05 1971-05-25 Selective signaling system

Country Status (8)

Country Link
US (1) US3651274A (en)
JP (1) JPS5535908B1 (en)
AU (1) AU468656B2 (en)
CA (1) CA947851A (en)
DE (1) DE2148869A1 (en)
FR (1) FR2110969A5 (en)
GB (1) GB1352238A (en)
IT (1) IT939927B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3778554A (en) * 1971-05-24 1973-12-11 Bell Telephone Labor Inc Single three-wire-port pbx intercom trunk circuit arrangement
US4000375A (en) * 1975-02-20 1976-12-28 Hachishiro Kawamura Automatic call transfer circuit for a plurality of telephones
US4049914A (en) * 1976-08-30 1977-09-20 Rockwell International Corporation Frequency division multiplex voice communication apparatus with hierarchy of stations
CA1200036A (en) * 1978-03-13 1986-01-28 Guido Panizzon Partyline subscriber interface circuit
AU535333B2 (en) * 1979-07-25 1984-03-15 L M Ericsson Pty. Ltd. Loop sharing in digital systems
US4744103A (en) * 1985-11-27 1988-05-10 Rauland-Borg Corporation Computer controlled multi-link communication system
US5978461A (en) * 1998-01-20 1999-11-02 Ground Zero Engineering, L.L.C. Telephone switching system with internal and external channel
US7023975B2 (en) * 2001-08-14 2006-04-04 Sharp Laboratories Of America, Inc. Privacy mode system and method for home network telephone

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2221655A (en) * 1936-10-26 1940-11-12 Zwietusch E & Co Gmbh Party line telephone system
US2395798A (en) * 1942-12-17 1946-03-05 Bell Telephone Labor Inc Traffic control system

Also Published As

Publication number Publication date
JPS479152A (en) 1972-05-12
FR2110969A5 (en) 1972-06-02
US3651274A (en) 1972-03-21
DE2148869A1 (en) 1972-04-06
AU3375471A (en) 1973-03-29
JPS5535908B1 (en) 1980-09-17
AU468656B2 (en) 1976-01-22
GB1352238A (en) 1974-05-08
IT939927B (en) 1973-02-10

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