CA499540A - Systeme de signalisation de code de frequence telephonique - Google Patents

Systeme de signalisation de code de frequence telephonique

Info

Publication number
CA499540A
CA499540A CA499540A CA499540DA CA499540A CA 499540 A CA499540 A CA 499540A CA 499540 A CA499540 A CA 499540A CA 499540D A CA499540D A CA 499540DA CA 499540 A CA499540 A CA 499540A
Authority
CA
Canada
Prior art keywords
frequency code
voice frequency
signalling system
code signalling
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
CA499540A
Other languages
English (en)
Inventor
Den Hertog Martinus
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 CA499540A publication Critical patent/CA499540A/fr
Expired legal-status Critical Current

Links

CA499540A Systeme de signalisation de code de frequence telephonique Expired CA499540A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA499540T

Publications (1)

Publication Number Publication Date
CA499540A true CA499540A (fr) 1954-01-26

Family

ID=35644983

Family Applications (1)

Application Number Title Priority Date Filing Date
CA499540A Expired CA499540A (fr) Systeme de signalisation de code de frequence telephonique

Country Status (1)

Country Link
CA (1) CA499540A (fr)

Similar Documents

Publication Publication Date Title
CA499540A (fr) Systeme de signalisation de code de frequence telephonique
CA503448A (fr) Systemes de signalisation a frequences de voix
CA499771A (fr) Systeme de signalisation de frequence telephonique
CA505804A (fr) Systeme de signalisation telephonique
CA517169A (fr) Systeme de signalisation a frequence de voix
CA505876A (fr) Systeme de signalisation telephonique
CA502785A (fr) Systeme de signalisation d'abonnes
CA502786A (fr) Systeme de signalisation d'abonnes
CA499348A (fr) Systeme de communication de signaux a ondes
CA502773A (fr) Systeme de signalisation
CA503175A (fr) Systeme de signalisation
CA506675A (fr) Systeme de signalisation
CA594467A (en) Radio communication system
CA504718A (fr) Systemes de signalisation d'abonne
CA504719A (fr) Systemes de signalisation d'abonne
CA514584A (fr) Systeme de signalisation a frequence de tonalite
CA499021A (fr) Agencement de commande de signalisation de frequence telephonique entre bureaux
CA526019A (fr) Systeme de signalisation d'abonne
CA526020A (fr) Systeme de signalisation d'abonne
CA498169A (fr) Systeme de signalisation de telephone
CA499772A (fr) Systemes de signalisation
CA504711A (fr) Systeme de signalisation d'alarme
CA500704A (fr) Systemes de signalisation a multi-canalisation
CA504827A (fr) Systemes de signalisation a multi-canalisation
CA503237A (fr) Systeme selectif de signalisation