FR2453575B1 - - Google Patents

Info

Publication number
FR2453575B1
FR2453575B1 FR7908781A FR7908781A FR2453575B1 FR 2453575 B1 FR2453575 B1 FR 2453575B1 FR 7908781 A FR7908781 A FR 7908781A FR 7908781 A FR7908781 A FR 7908781A FR 2453575 B1 FR2453575 B1 FR 2453575B1
Authority
FR
France
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
FR7908781A
Other languages
French (fr)
Other versions
FR2453575A1 (fr
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.)
Nokia Inc
Original Assignee
Nokia Inc
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 Nokia Inc filed Critical Nokia Inc
Priority to FR7908781A priority Critical patent/FR2453575A1/fr
Publication of FR2453575A1 publication Critical patent/FR2453575A1/fr
Application granted granted Critical
Publication of FR2453575B1 publication Critical patent/FR2453575B1/fr
Granted 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
    • H04Q1/45—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling in which m-out-of-n signalling frequencies are transmitted

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR7908781A 1979-04-06 1979-04-06 Equipement de signalisation multifrequence a commande centralisee Granted FR2453575A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7908781A FR2453575A1 (fr) 1979-04-06 1979-04-06 Equipement de signalisation multifrequence a commande centralisee

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7908781A FR2453575A1 (fr) 1979-04-06 1979-04-06 Equipement de signalisation multifrequence a commande centralisee

Publications (2)

Publication Number Publication Date
FR2453575A1 FR2453575A1 (fr) 1980-10-31
FR2453575B1 true FR2453575B1 (enExample) 1982-03-19

Family

ID=9224070

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7908781A Granted FR2453575A1 (fr) 1979-04-06 1979-04-06 Equipement de signalisation multifrequence a commande centralisee

Country Status (1)

Country Link
FR (1) FR2453575A1 (enExample)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2280141A1 (fr) * 1974-07-26 1976-02-20 Materiel Telephonique Systeme de signalisation entre centres de traitement d'informations
FR2391622A1 (fr) * 1977-05-18 1978-12-15 Materiel Telephonique Systeme de signalisation multifrequence
FR2404365A1 (fr) * 1977-09-21 1979-04-20 Materiel Telephonique Central telephonique a barres croisees comportant un systeme d'enregistreurs a processeurs

Also Published As

Publication number Publication date
FR2453575A1 (fr) 1980-10-31

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Legal Events

Date Code Title Description
ST Notification of lapse