CA947446A - Electronic key telephone system - Google Patents

Electronic key telephone system

Info

Publication number
CA947446A
CA947446A CA151,282A CA151282A CA947446A CA 947446 A CA947446 A CA 947446A CA 151282 A CA151282 A CA 151282A CA 947446 A CA947446 A CA 947446A
Authority
CA
Canada
Prior art keywords
telephone system
electronic key
key telephone
electronic
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
CA151,282A
Other versions
CA151282S (en
Inventor
Peter Ridley
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.)
Nortel Networks Ltd
Original Assignee
Northern Electric Co 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 Northern Electric Co Ltd filed Critical Northern Electric Co Ltd
Priority to CA151,282A priority Critical patent/CA947446A/en
Application granted granted Critical
Publication of CA947446A publication Critical patent/CA947446A/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
    • H04M9/007—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 wherein the key telephone sets are star-connected to a central unit by a limited number of lines

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
CA151,282A 1972-09-08 1972-09-08 Electronic key telephone system Expired CA947446A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA151,282A CA947446A (en) 1972-09-08 1972-09-08 Electronic key telephone system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA151,282A CA947446A (en) 1972-09-08 1972-09-08 Electronic key telephone system

Publications (1)

Publication Number Publication Date
CA947446A true CA947446A (en) 1974-05-14

Family

ID=4094385

Family Applications (1)

Application Number Title Priority Date Filing Date
CA151,282A Expired CA947446A (en) 1972-09-08 1972-09-08 Electronic key telephone system

Country Status (1)

Country Link
CA (1) CA947446A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534784A2 (en) * 1991-09-26 1993-03-31 Ipc Information Systems, Inc. Distributed controlled switching network for telephone communications

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534784A2 (en) * 1991-09-26 1993-03-31 Ipc Information Systems, Inc. Distributed controlled switching network for telephone communications
EP0534784A3 (en) * 1991-09-26 1994-06-29 Ipc Information Systems Inc Distributed controlled switching network for telephone communications

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