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CA600139A - Fault signalling to telephone systems - Google Patents

Fault signalling to telephone systems

Info

Publication number
CA600139A
CA600139A CA600139A CA600139DA CA600139A CA 600139 A CA600139 A CA 600139A CA 600139 A CA600139 A CA 600139A CA 600139D A CA600139D A CA 600139DA CA 600139 A CA600139 A CA 600139A
Authority
CA
Canada
Prior art keywords
telephone systems
fault signalling
signalling
fault
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
CA600139A
Inventor
F. Smith Sydney
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.)
Siemens Brothers and Co Ltd
Original Assignee
Siemens Brothers and Co Ltd
Publication date
Application granted granted Critical
Publication of CA600139A publication Critical patent/CA600139A/en
Expired legal-status Critical Current

Links

CA600139A Fault signalling to telephone systems Expired CA600139A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA600139T

Publications (1)

Publication Number Publication Date
CA600139A true CA600139A (en) 1960-06-21

Family

ID=35815923

Family Applications (1)

Application Number Title Priority Date Filing Date
CA600139A Expired CA600139A (en) Fault signalling to telephone systems

Country Status (1)

Country Link
CA (1) CA600139A (en)

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