CA499771A - Systeme de signalisation de frequence telephonique - Google Patents

Systeme de signalisation de frequence telephonique

Info

Publication number
CA499771A
CA499771A CA499771A CA499771DA CA499771A CA 499771 A CA499771 A CA 499771A CA 499771 A CA499771 A CA 499771A CA 499771D A CA499771D A CA 499771DA CA 499771 A CA499771 A CA 499771A
Authority
CA
Canada
Prior art keywords
signaling system
voice frequency
frequency signaling
voice
signaling
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
CA499771A
Other languages
English (en)
Inventor
W. Lucek Charles
W. Fritschi Walter
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 CA499771A publication Critical patent/CA499771A/fr
Expired legal-status Critical Current

Links

CA499771A Systeme de signalisation de frequence telephonique Expired CA499771A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA499771T

Publications (1)

Publication Number Publication Date
CA499771A true CA499771A (fr) 1954-02-02

Family

ID=35645218

Family Applications (1)

Application Number Title Priority Date Filing Date
CA499771A Expired CA499771A (fr) Systeme de signalisation de frequence telephonique

Country Status (1)

Country Link
CA (1) CA499771A (fr)

Similar Documents

Publication Publication Date Title
CA499771A (fr) Systeme de signalisation de frequence telephonique
CA503448A (fr) Systemes de signalisation a frequences de voix
CA499540A (fr) Systeme de signalisation de code de frequence telephonique
CA517169A (fr) Systeme de signalisation a frequence de voix
CA499774A (fr) Circiut de signalisation de frequence telephonique
CA505876A (fr) Systeme de signalisation telephonique
CA514584A (fr) Systeme de signalisation a frequence de tonalite
CA505804A (fr) Systeme de signalisation telephonique
CA502773A (fr) Systeme de signalisation
CA503175A (fr) Systeme de signalisation
CA506675A (fr) Systeme de signalisation
CA499772A (fr) Systemes de signalisation
CA499021A (fr) Agencement de commande de signalisation de frequence telephonique entre bureaux
CA502669A (fr) Dispositifs de production de sons pour signalisation
CA502785A (fr) Systeme de signalisation d'abonnes
CA502786A (fr) Systeme de signalisation d'abonnes
CA503237A (fr) Systeme selectif de signalisation
CA507871A (fr) Systeme de telecommunication
CA504711A (fr) Systeme de signalisation d'alarme
CA496189A (fr) Systeme telephonique agence pour la signalisation de frequence de la voix
CA501908A (fr) Systeme de recepteur telephonique
CA502062A (fr) Systeme de communication a haute frequence
CA504718A (fr) Systemes de signalisation d'abonne
CA504719A (fr) Systemes de signalisation d'abonne
CA491719A (fr) Systeme telephonique