FR2280141B1 - - Google Patents

Info

Publication number
FR2280141B1
FR2280141B1 FR7426100A FR7426100A FR2280141B1 FR 2280141 B1 FR2280141 B1 FR 2280141B1 FR 7426100 A FR7426100 A FR 7426100A FR 7426100 A FR7426100 A FR 7426100A FR 2280141 B1 FR2280141 B1 FR 2280141B1
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
FR7426100A
Other languages
French (fr)
Other versions
FR2280141A1 (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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Priority to FR7426100A priority Critical patent/FR2280141A1/fr
Priority to ES439668A priority patent/ES439668A1/es
Publication of FR2280141A1 publication Critical patent/FR2280141A1/fr
Application granted granted Critical
Publication of FR2280141B1 publication Critical patent/FR2280141B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/30—Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • 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)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
FR7426100A 1974-07-26 1974-07-26 Systeme de signalisation entre centres de traitement d'informations Granted FR2280141A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR7426100A FR2280141A1 (fr) 1974-07-26 1974-07-26 Systeme de signalisation entre centres de traitement d'informations
ES439668A ES439668A1 (es) 1974-07-26 1975-07-23 Un sistema de senalizacion entre centros de proceso de da- tos.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7426100A FR2280141A1 (fr) 1974-07-26 1974-07-26 Systeme de signalisation entre centres de traitement d'informations

Publications (2)

Publication Number Publication Date
FR2280141A1 FR2280141A1 (fr) 1976-02-20
FR2280141B1 true FR2280141B1 (de) 1978-03-31

Family

ID=9141787

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7426100A Granted FR2280141A1 (fr) 1974-07-26 1974-07-26 Systeme de signalisation entre centres de traitement d'informations

Country Status (2)

Country Link
ES (1) ES439668A1 (de)
FR (1) FR2280141A1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1053821A (en) * 1976-08-19 1979-05-01 Ernst A. Munter Receiver/sender for signalling between telephone switching facilities
FR2453575A1 (fr) * 1979-04-06 1980-10-31 Cit Alcatel Equipement de signalisation multifrequence a commande centralisee
EP0277471B1 (de) * 1987-02-05 1991-09-18 Alcatel Bell-Sdt S.A. Verfahren zur Übertragungsfehler-Erkennung und -Korrektur

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604947A (en) * 1965-10-23 1971-09-14 Aerojet General Co Variable filter device
CH472149A (de) * 1967-03-22 1969-04-30 Siemens Ag N-Pfad-Bandfilter
DE1591473B1 (de) * 1967-04-11 1971-12-09 Siemens Ag Empfaenger fuer mehrere wellenbereiche
GB1378818A (en) * 1971-08-27 1974-12-27 Rockwell International Corp Digital tone signal generator
FR2191827A5 (de) * 1972-06-27 1974-02-01 Socotel Mixte D Veloppem

Also Published As

Publication number Publication date
ES439668A1 (es) 1977-03-16
FR2280141A1 (fr) 1976-02-20

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Legal Events

Date Code Title Description
ST Notification of lapse