CA563277A - Telephone ringing-signal transmission system - Google Patents

Telephone ringing-signal transmission system

Info

Publication number
CA563277A
CA563277A CA563277A CA563277DA CA563277A CA 563277 A CA563277 A CA 563277A CA 563277 A CA563277 A CA 563277A CA 563277D A CA563277D A CA 563277DA CA 563277 A CA563277 A CA 563277A
Authority
CA
Canada
Prior art keywords
signal transmission
transmission system
telephone ringing
ringing
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
CA563277A
Other languages
French (fr)
Inventor
C. Weller 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 CA563277A publication Critical patent/CA563277A/en
Expired legal-status Critical Current

Links

CA563277A Telephone ringing-signal transmission system Expired CA563277A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA563277T

Publications (1)

Publication Number Publication Date
CA563277A true CA563277A (en) 1958-09-16

Family

ID=35729722

Family Applications (1)

Application Number Title Priority Date Filing Date
CA563277A Expired CA563277A (en) Telephone ringing-signal transmission system

Country Status (1)

Country Link
CA (1) CA563277A (en)

Similar Documents

Publication Publication Date Title
CA563277A (en) Telephone ringing-signal transmission system
CA567399A (en) Telephone system
CA562753A (en) Telephone systems
CA565686A (en) Telephone systems
CA566172A (en) Telephone systems
CA568218A (en) Telephone systems
CA562911A (en) Telegraph transmission systems
CA567796A (en) Communication system
CA562242A (en) Automatic telephone system
CA552951A (en) Transmission
CA568093A (en) Transmission
CA552593A (en) Transmission
AU227169B2 (en) Transmission
CA552952A (en) Transmission
CA554493A (en) Transmission
CA556046A (en) Transmission
AU227012B2 (en) Transmission
CA555972A (en) Telecommunication systems
CA561086A (en) Impulse communication system
CA554627A (en) Priority party line telephone system
AU4197458A (en) Transmission
CA557106A (en) Automatic telephone systems
CA567448A (en) Automatic telephone systems
CA568339A (en) Transmission device
CA563957A (en) Carrier-wave telephone receiver