CA504467A - Signalling in telephone systems - Google Patents

Signalling in telephone systems

Info

Publication number
CA504467A
CA504467A CA504467A CA504467DA CA504467A CA 504467 A CA504467 A CA 504467A CA 504467 A CA504467 A CA 504467A CA 504467D A CA504467D A CA 504467DA CA 504467 A CA504467 A CA 504467A
Authority
CA
Canada
Prior art keywords
signalling
telephone systems
telephone
systems
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
CA504467A
Other languages
French (fr)
Inventor
P. G. Wright Esmond
F. Gould William
S. Hargreaves F.
J. Reynolds William
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.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Publication date
Application granted granted Critical
Publication of CA504467A publication Critical patent/CA504467A/en
Expired legal-status Critical Current

Links

CA504467A Signalling in telephone systems Expired CA504467A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA504467T

Publications (1)

Publication Number Publication Date
CA504467A true CA504467A (en) 1954-07-20

Family

ID=35650388

Family Applications (1)

Application Number Title Priority Date Filing Date
CA504467A Expired CA504467A (en) Signalling in telephone systems

Country Status (1)

Country Link
CA (1) CA504467A (en)

Similar Documents

Publication Publication Date Title
AU213016B2 (en) Signalling in telephone systems
CA504467A (en) Signalling in telephone systems
AU89054A (en) Signalling in telephone systems
AU205275B2 (en) Improvements in telephone systems
AU203647B2 (en) Improvements in telephone systems
AU204127B2 (en) Improvements in telephone systems
AU165035B2 (en) Improvements relating to falut signalling in telephone systems
CA505804A (en) Telephone signalling system
CA505876A (en) Telephone signaling system
AU201254A (en) Improvements in telephone systems
AU501854A (en) Improvements in telephone systems
AU2468554A (en) Improvements relating to falut signalling in telephone systems
CA504718A (en) Subscriber signalling systems
CA504719A (en) Subscriber signalling systems
CA501321A (en) Telephone systems
CA499356A (en) Telephone systems
CA502236A (en) Telephone systems
CA502238A (en) Telephone systems
CA502239A (en) Telephone systems
CA506411A (en) Telephone systems
CA507617A (en) Telephone systems
AU165054B2 (en) Improvements in telephone systems
CA499772A (en) Signaling systems
CA502786A (en) Subscriber signalling system
CA502785A (en) Subscriber signalling system