CA998485A - Line circuit for key telephone systems - Google Patents

Line circuit for key telephone systems

Info

Publication number
CA998485A
CA998485A CA175,971A CA175971A CA998485A CA 998485 A CA998485 A CA 998485A CA 175971 A CA175971 A CA 175971A CA 998485 A CA998485 A CA 998485A
Authority
CA
Canada
Prior art keywords
line circuit
telephone systems
key telephone
key
systems
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
CA175,971A
Other versions
CA175971S (en
Inventor
Edouard Pinede
John F. Litster
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 CA175,971A priority Critical patent/CA998485A/en
Priority to US05/627,935 priority patent/US4064373A/en
Application granted granted Critical
Publication of CA998485A publication Critical patent/CA998485A/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)
CA175,971A 1973-07-09 1973-07-09 Line circuit for key telephone systems Expired CA998485A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA175,971A CA998485A (en) 1973-07-09 1973-07-09 Line circuit for key telephone systems
US05/627,935 US4064373A (en) 1973-07-09 1975-11-03 Line circuit for key telephone systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA175,971A CA998485A (en) 1973-07-09 1973-07-09 Line circuit for key telephone systems

Publications (1)

Publication Number Publication Date
CA998485A true CA998485A (en) 1976-10-12

Family

ID=4097233

Family Applications (1)

Application Number Title Priority Date Filing Date
CA175,971A Expired CA998485A (en) 1973-07-09 1973-07-09 Line circuit for key telephone systems

Country Status (1)

Country Link
CA (1) CA998485A (en)

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