CA546983A - Busy tone circuit for an automatic telephone system - Google Patents

Busy tone circuit for an automatic telephone system

Info

Publication number
CA546983A
CA546983A CA546983A CA546983DA CA546983A CA 546983 A CA546983 A CA 546983A CA 546983 A CA546983 A CA 546983A CA 546983D A CA546983D A CA 546983DA CA 546983 A CA546983 A CA 546983A
Authority
CA
Canada
Prior art keywords
telephone system
busy tone
automatic telephone
tone circuit
circuit
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
CA546983A
Other languages
French (fr)
Inventor
Six Willem
Domburg Jacobus
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.)
Koninklijke Philips NV
Original Assignee
Philips Gloeilampenfabrieken NV
Publication date
Application granted granted Critical
Publication of CA546983A publication Critical patent/CA546983A/en
Expired legal-status Critical Current

Links

CA546983A Busy tone circuit for an automatic telephone system Expired CA546983A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA546983T

Publications (1)

Publication Number Publication Date
CA546983A true CA546983A (en) 1957-10-01

Family

ID=35704185

Family Applications (1)

Application Number Title Priority Date Filing Date
CA546983A Expired CA546983A (en) Busy tone circuit for an automatic telephone system

Country Status (1)

Country Link
CA (1) CA546983A (en)

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