CA499774A - Circiut de signalisation de frequence telephonique - Google Patents

Circiut de signalisation de frequence telephonique

Info

Publication number
CA499774A
CA499774A CA499774A CA499774DA CA499774A CA 499774 A CA499774 A CA 499774A CA 499774 A CA499774 A CA 499774A CA 499774D A CA499774D A CA 499774DA CA 499774 A CA499774 A CA 499774A
Authority
CA
Canada
Prior art keywords
voice frequency
signaling circuit
frequency signaling
circuit
voice
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
CA499774A
Other languages
English (en)
Inventor
Weaver Allan
W. Fritschi Walter
O. Soffel Robert
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 CA499774A publication Critical patent/CA499774A/fr
Expired legal-status Critical Current

Links

CA499774A Circiut de signalisation de frequence telephonique Expired CA499774A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA499774T

Publications (1)

Publication Number Publication Date
CA499774A true CA499774A (fr) 1954-02-02

Family

ID=35645221

Family Applications (1)

Application Number Title Priority Date Filing Date
CA499774A Expired CA499774A (fr) Circiut de signalisation de frequence telephonique

Country Status (1)

Country Link
CA (1) CA499774A (fr)

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