CA1177978A - Controleur de signaux indicateurs d'appels en cours pour systeme telephonique et methode de fonctionnement - Google Patents

Controleur de signaux indicateurs d'appels en cours pour systeme telephonique et methode de fonctionnement

Info

Publication number
CA1177978A
CA1177978A CA000416246A CA416246A CA1177978A CA 1177978 A CA1177978 A CA 1177978A CA 000416246 A CA000416246 A CA 000416246A CA 416246 A CA416246 A CA 416246A CA 1177978 A CA1177978 A CA 1177978A
Authority
CA
Canada
Prior art keywords
instant
signal
code
value
call progress
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
CA000416246A
Other languages
English (en)
Inventor
Chao-Jan Cheng
John R. Donak
Samir E. Ahad
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.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Northern Telecom Ltd filed Critical Northern Telecom Ltd
Priority to CA000416246A priority Critical patent/CA1177978A/fr
Priority to JP21883783A priority patent/JPS59188267A/ja
Application granted granted Critical
Publication of CA1177978A publication Critical patent/CA1177978A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/448—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal
    • H04Q1/4485—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency with conversion of a single frequency signal into a digital signal which is transmitted in digital form

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Interface Circuits In Exchanges (AREA)
CA000416246A 1982-11-24 1982-11-24 Controleur de signaux indicateurs d'appels en cours pour systeme telephonique et methode de fonctionnement Expired CA1177978A (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA000416246A CA1177978A (fr) 1982-11-24 1982-11-24 Controleur de signaux indicateurs d'appels en cours pour systeme telephonique et methode de fonctionnement
JP21883783A JPS59188267A (ja) 1982-11-24 1983-11-22 電話システムにおける呼出し反復信号モニタ−およびその方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA000416246A CA1177978A (fr) 1982-11-24 1982-11-24 Controleur de signaux indicateurs d'appels en cours pour systeme telephonique et methode de fonctionnement

Publications (1)

Publication Number Publication Date
CA1177978A true CA1177978A (fr) 1984-11-13

Family

ID=4124013

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000416246A Expired CA1177978A (fr) 1982-11-24 1982-11-24 Controleur de signaux indicateurs d'appels en cours pour systeme telephonique et methode de fonctionnement

Country Status (2)

Country Link
JP (1) JPS59188267A (fr)
CA (1) CA1177978A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493056A2 (fr) * 1990-12-21 1992-07-01 Codex Corporation Décodeur de progrès d'appel pour tonalité multiple cadencée sur lignes téléphoniques

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0493056A2 (fr) * 1990-12-21 1992-07-01 Codex Corporation Décodeur de progrès d'appel pour tonalité multiple cadencée sur lignes téléphoniques
EP0493056A3 (en) * 1990-12-21 1993-08-11 Codex Corporation Call progress decoder for multiple cadenced tones on telephone lines

Also Published As

Publication number Publication date
JPS59188267A (ja) 1984-10-25

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Legal Events

Date Code Title Description
MKEC Expiry (correction)
MKEX Expiry