CA1283231C - Branched telephone system - Google Patents

Branched telephone system

Info

Publication number
CA1283231C
CA1283231C CA000560555A CA560555A CA1283231C CA 1283231 C CA1283231 C CA 1283231C CA 000560555 A CA000560555 A CA 000560555A CA 560555 A CA560555 A CA 560555A CA 1283231 C CA1283231 C CA 1283231C
Authority
CA
Canada
Prior art keywords
telephones
telephone
telephone system
branched
priority
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 - Lifetime
Application number
CA000560555A
Other languages
English (en)
French (fr)
Inventor
Hisashi Fujisaki
Keiko Shimada
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of CA1283231C publication Critical patent/CA1283231C/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04M1/71—Substation extension arrangements
    • H04M1/715—Substation extension arrangements using two or more extensions per line
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/725—Cordless telephones

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephone Function (AREA)
CA000560555A 1987-03-05 1988-03-04 Branched telephone system Expired - Lifetime CA1283231C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62-51282 1987-03-05
JP62051282A JPS63217758A (ja) 1987-03-05 1987-03-05 分岐電話機

Publications (1)

Publication Number Publication Date
CA1283231C true CA1283231C (en) 1991-04-16

Family

ID=12882578

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000560555A Expired - Lifetime CA1283231C (en) 1987-03-05 1988-03-04 Branched telephone system

Country Status (6)

Country Link
US (1) US5022068A (enExample)
EP (1) EP0281386B1 (enExample)
JP (1) JPS63217758A (enExample)
KR (1) KR920001412B1 (enExample)
AU (1) AU622857B2 (enExample)
CA (1) CA1283231C (enExample)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266430B (en) * 1992-04-13 1996-02-28 Clive Richard Harris Call connection priority designator
US5444772A (en) * 1994-05-11 1995-08-22 Coker; Elzie L. Telephone line lockout device
US5553126A (en) * 1995-01-20 1996-09-03 Gte Laboratories Incorporated Secure anti-jamming wireless party line
KR100374340B1 (ko) * 1996-04-03 2003-05-17 삼성전자주식회사 가정용으로 이용가능한 메시지대기전화기
US5978469A (en) * 1997-01-21 1999-11-02 U S West, Inc. Apparatus for telephone extension control
JP3750642B2 (ja) * 2002-08-30 2006-03-01 ブラザー工業株式会社 通信システム

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3435151A (en) * 1965-12-28 1969-03-25 Int Standard Electric Corp Arrangement of branched telephone subsets
JPS50115906A (enExample) * 1974-02-22 1975-09-10
US4000375A (en) * 1975-02-20 1976-12-28 Hachishiro Kawamura Automatic call transfer circuit for a plurality of telephones
US4075434A (en) * 1976-03-25 1978-02-21 San/Bar Corporation Key telephone privacy exclusion apparatus
JPS54154202A (en) * 1978-05-26 1979-12-05 Nec Corp Talking protective circuit for multi-telephone
NL7809628A (nl) * 1978-09-21 1980-03-25 Nederlanden Staat Schakeling voor multipel aangesloten telefoontoestel- len.
US4218590A (en) * 1979-01-29 1980-08-19 Crest Industries, Inc. Key telephone system having automatic exclusion circuit for line privacy
JPS57190450A (en) * 1981-05-19 1982-11-24 Meisei Electric Co Ltd Privacy system for push-button dial telephone set
JPS59178851A (ja) * 1983-03-30 1984-10-11 Toshiba Corp 電話機回路
US4654655A (en) * 1984-03-02 1987-03-31 Motorola, Inc. Multi-user serial data bus
US4640987A (en) * 1984-04-23 1987-02-03 Keizo Tsukada Cordless telephone
JPS60242738A (ja) * 1984-05-17 1985-12-02 Sony Corp コ−ドレステレホン
ES282513Y (es) * 1984-11-12 1986-10-01 Amper, S.A. Dispositivo exclusor para telefonos instalados en paralelo
DE3504046A1 (de) * 1985-02-04 1986-08-14 ELMEG GmbH Kommunikationstechnik, 3150 Peine Schaltung zum anschalten von zwei fernsprechendeinrichtungen an eine gemeinsame anschlussleitung
DE3524523A1 (de) * 1985-07-05 1987-01-15 Elmeg Kommunikationstech Schaltung zum im wesentlichen gleichberechtigten anschalten mindestens zweier fernsprechendeinrichtungen an eine gemeinsame leitung
JPS6277727A (ja) * 1985-09-30 1987-04-09 Nec Corp コ−ドレス電話機用回線切替回路
US4718080A (en) * 1985-12-16 1988-01-05 Serrano Arthur L Microprocessor controlled interface for cellular system
US4745632A (en) * 1985-12-27 1988-05-17 Duffy Anthony G Wireless mobile telephone communication system
US4747128A (en) * 1986-05-22 1988-05-24 Chan Kwok Leung Telephone privacy protector
FR2601537B1 (fr) * 1986-07-11 1994-03-25 Lepaillier Patrick Installation telephonique a une ligne et plusieurs postes recepteurs
US4748685A (en) * 1986-10-10 1988-05-31 Motorola, Inc. Mobile radio communications system

Also Published As

Publication number Publication date
KR920001412B1 (ko) 1992-02-13
KR880012061A (ko) 1988-11-03
AU1274288A (en) 1988-09-08
EP0281386A2 (en) 1988-09-07
AU622857B2 (en) 1992-04-30
EP0281386A3 (en) 1990-12-05
JPS63217758A (ja) 1988-09-09
JPH055421B2 (enExample) 1993-01-22
US5022068A (en) 1991-06-04
EP0281386B1 (en) 1995-02-08

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Legal Events

Date Code Title Description
MKLA Lapsed