CA983184A - Key telephone system - Google Patents

Key telephone system

Info

Publication number
CA983184A
CA983184A CA138,681A CA138681A CA983184A CA 983184 A CA983184 A CA 983184A CA 138681 A CA138681 A CA 138681A CA 983184 A CA983184 A CA 983184A
Authority
CA
Canada
Prior art keywords
telephone system
key telephone
key
telephone
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
CA138,681A
Other languages
English (en)
Other versions
CA138681S (en
Inventor
Edouard Pinede
Anthony W. Wilson
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.)
ITT Canada Ltd
Original Assignee
ITT Canada Ltd
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 ITT Canada Ltd filed Critical ITT Canada Ltd
Priority to CA138,681A priority Critical patent/CA983184A/en
Priority to FR7311575A priority patent/FR2178233B3/fr
Application granted granted Critical
Publication of CA983184A publication Critical patent/CA983184A/en
Expired legal-status Critical Current

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
    • H04M9/005—Arrangements for interconnection not involving centralised switching with subscriber controlled access to a line, i.e. key telephone systems with subscriber controlled access to an exchange line
    • H04M9/006—Exchange line circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
CA138,681A 1972-03-30 1972-03-30 Key telephone system Expired CA983184A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA138,681A CA983184A (en) 1972-03-30 1972-03-30 Key telephone system
FR7311575A FR2178233B3 (OSRAM) 1972-03-30 1973-03-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA138,681A CA983184A (en) 1972-03-30 1972-03-30 Key telephone system

Publications (1)

Publication Number Publication Date
CA983184A true CA983184A (en) 1976-02-03

Family

ID=4092836

Family Applications (1)

Application Number Title Priority Date Filing Date
CA138,681A Expired CA983184A (en) 1972-03-30 1972-03-30 Key telephone system

Country Status (2)

Country Link
CA (1) CA983184A (OSRAM)
FR (1) FR2178233B3 (OSRAM)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358065A1 (fr) * 1976-07-09 1978-02-03 Barphone Sa Poste telephonique d'intercommunication, et installation telephonique comportant un tel poste

Also Published As

Publication number Publication date
FR2178233A1 (OSRAM) 1973-11-09
FR2178233B3 (OSRAM) 1976-03-26

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