CH600722A5 - - Google Patents

Info

Publication number
CH600722A5
CH600722A5 CH738976A CH738976A CH600722A5 CH 600722 A5 CH600722 A5 CH 600722A5 CH 738976 A CH738976 A CH 738976A CH 738976 A CH738976 A CH 738976A CH 600722 A5 CH600722 A5 CH 600722A5
Authority
CH
Switzerland
Application number
CH738976A
Inventor
Evert Magnusson Dipl Ing Sten
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of CH600722A5 publication Critical patent/CH600722A5/xx

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Alarm Systems (AREA)
CH738976A 1975-06-13 1976-06-11 CH600722A5 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE7506831A SE385533B (sv) 1975-06-13 1975-06-13 Tvaapparatsystem

Publications (1)

Publication Number Publication Date
CH600722A5 true CH600722A5 (da) 1978-06-30

Family

ID=20324868

Family Applications (1)

Application Number Title Priority Date Filing Date
CH738976A CH600722A5 (da) 1975-06-13 1976-06-11

Country Status (10)

Country Link
US (1) US4060700A (da)
CA (1) CA1048185A (da)
CH (1) CH600722A5 (da)
DK (1) DK262276A (da)
FI (1) FI761683A (da)
FR (1) FR2314624A1 (da)
GB (1) GB1521216A (da)
NL (1) NL7606340A (da)
NO (1) NO135767C (da)
SE (1) SE385533B (da)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4220827A (en) * 1979-02-21 1980-09-02 Bell Telephone Laboratories, Incorporated Telephone signaling circuit
FR2517910A1 (fr) * 1981-12-07 1983-06-10 Faure Yves Dispositif de branchement de deux postes telephoniques sur la meme ligne d'appel
GB2166927A (en) * 1984-11-09 1986-05-14 Austin Taylor Electrical Ltd Telephone control system
GB8515657D0 (en) * 1985-06-20 1985-07-24 Gen Electric Co Plc Telephone apparatus
GB2206015A (en) * 1986-05-12 1988-12-21 Rice Multiphones Inc Multifunction two line telephone system
GB2207325A (en) * 1987-06-23 1989-01-25 Boon Chen Lim Telephone with intercom facility
US4893334A (en) * 1987-08-28 1990-01-09 Power Play Intercommunication system for telephones
US5502762A (en) * 1994-06-10 1996-03-26 Andrew; Brian J. System and method for simultaneously controlling ringing at local and remote telephones
US5796789A (en) * 1997-01-06 1998-08-18 Omega Electronics Inc. Alerting device for telephones

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE301025C (da) *
US698386A (en) * 1901-01-23 1902-04-22 Albert K Andriano Secret-service telephone system.
DE703546C (de) * 1929-10-01 1941-03-11 Normalzeit Lehner & Co Schaltungsanordnung fuer Fernsprechnebenstellenanlagen
FR1441285A (da) * 1965-07-26 1966-06-03 Cie Des Telephones
US3567868A (en) * 1968-08-27 1971-03-02 Tokyo Shibaura Electric Co Interphone device having presence indicator means
GB1480223A (en) * 1973-10-26 1977-07-20 Gte International Inc Telephone intercommunication system providing common access to a communication line
US3941933A (en) * 1974-08-20 1976-03-02 Jab Company, Inc. Paging intercommunication system

Also Published As

Publication number Publication date
NO762025L (da) 1976-12-14
FR2314624A1 (fr) 1977-01-07
CA1048185A (en) 1979-02-06
DK262276A (da) 1976-12-14
FI761683A (da) 1976-12-14
GB1521216A (en) 1978-08-16
NL7606340A (nl) 1976-12-15
US4060700A (en) 1977-11-29
SE385533B (sv) 1976-07-05
NO135767C (da) 1977-05-25
NO135767B (da) 1977-02-14

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Legal Events

Date Code Title Description
PL Patent ceased