CA885011A - Supervisory circuit for telephone lines - Google Patents

Supervisory circuit for telephone lines

Info

Publication number
CA885011A
CA885011A CA885011A CA885011DA CA885011A CA 885011 A CA885011 A CA 885011A CA 885011 A CA885011 A CA 885011A CA 885011D A CA885011D A CA 885011DA CA 885011 A CA885011 A CA 885011A
Authority
CA
Canada
Prior art keywords
telephone lines
supervisory circuit
supervisory
circuit
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
CA885011A
Inventor
S. Tjaden Garold
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 CA885011A publication Critical patent/CA885011A/en
Expired legal-status Critical Current

Links

CA885011A Supervisory circuit for telephone lines Expired CA885011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA885011T

Publications (1)

Publication Number Publication Date
CA885011A true CA885011A (en) 1971-11-02

Family

ID=36391323

Family Applications (1)

Application Number Title Priority Date Filing Date
CA885011A Expired CA885011A (en) Supervisory circuit for telephone lines

Country Status (1)

Country Link
CA (1) CA885011A (en)

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