BR7605129A - Circuito de juncao para unidade de intercomunicacoes - Google Patents

Circuito de juncao para unidade de intercomunicacoes

Info

Publication number
BR7605129A
BR7605129A BR7605129A BR7605129A BR7605129A BR 7605129 A BR7605129 A BR 7605129A BR 7605129 A BR7605129 A BR 7605129A BR 7605129 A BR7605129 A BR 7605129A BR 7605129 A BR7605129 A BR 7605129A
Authority
BR
Brazil
Prior art keywords
junction circuit
intercommunications
unit
intercommunications unit
junction
Prior art date
Application number
BR7605129A
Other languages
English (en)
Inventor
C Matheny
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 BR7605129A publication Critical patent/BR7605129A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/002—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
BR7605129A 1975-08-11 1976-08-05 Circuito de juncao para unidade de intercomunicacoes BR7605129A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/603,397 US4010332A (en) 1975-08-11 1975-08-11 Link circuit for intercom unit

Publications (1)

Publication Number Publication Date
BR7605129A true BR7605129A (pt) 1977-08-02

Family

ID=24415261

Family Applications (1)

Application Number Title Priority Date Filing Date
BR7605129A BR7605129A (pt) 1975-08-11 1976-08-05 Circuito de juncao para unidade de intercomunicacoes

Country Status (4)

Country Link
US (1) US4010332A (pt)
BR (1) BR7605129A (pt)
CA (1) CA1071784A (pt)
ES (1) ES450595A1 (pt)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4063047A (en) * 1977-03-04 1977-12-13 Bell Telephone Laboratories, Incorporated Key telephone system multilink hands free answer circuit
US4130737A (en) * 1977-09-28 1978-12-19 Melco Two-link intercom system
US4188511A (en) * 1978-01-27 1980-02-12 Tone Commander Systems, Inc. Multi-link telephone intercom system
US4158112A (en) * 1978-04-27 1979-06-12 Bell Telephone Laboratories, Incorporated Hands-free answer arrangement on intercom for key telephone system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3299217A (en) * 1963-10-31 1967-01-17 Bell Telephone Labor Inc Auxiliary interconnecting unit for multi-line subscriber telephone system
US3778554A (en) * 1971-05-24 1973-12-11 Bell Telephone Labor Inc Single three-wire-port pbx intercom trunk circuit arrangement
JPS539803B2 (pt) * 1973-01-13 1978-04-08
GB1480222A (en) * 1973-10-26 1977-07-20 Gte International Inc Telephone intercommunication system provided with a common communication line to which access is guarded

Also Published As

Publication number Publication date
ES450595A1 (es) 1977-09-16
US4010332A (en) 1977-03-01
CA1071784A (en) 1980-02-12

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