CA890072A - Line oriented key telephone system - Google Patents

Line oriented key telephone system

Info

Publication number
CA890072A
CA890072A CA890072A CA890072DA CA890072A CA 890072 A CA890072 A CA 890072A CA 890072 A CA890072 A CA 890072A CA 890072D A CA890072D A CA 890072DA CA 890072 A CA890072 A CA 890072A
Authority
CA
Canada
Prior art keywords
telephone system
key telephone
line oriented
oriented key
line
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
CA890072A
Inventor
C. Opferman David
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Publication date
Application granted granted Critical
Publication of CA890072A publication Critical patent/CA890072A/en
Expired legal-status Critical Current

Links

CA890072A Line oriented key telephone system Expired CA890072A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA890072T

Publications (1)

Publication Number Publication Date
CA890072A true CA890072A (en) 1972-01-04

Family

ID=36396233

Family Applications (1)

Application Number Title Priority Date Filing Date
CA890072A Expired CA890072A (en) Line oriented key telephone system

Country Status (1)

Country Link
CA (1) CA890072A (en)

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