FR2127450A5 - - Google Patents

Info

Publication number
FR2127450A5
FR2127450A5 FR7108190A FR7108190A FR2127450A5 FR 2127450 A5 FR2127450 A5 FR 2127450A5 FR 7108190 A FR7108190 A FR 7108190A FR 7108190 A FR7108190 A FR 7108190A FR 2127450 A5 FR2127450 A5 FR 2127450A5
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
FR7108190A
Other languages
French (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.)
Compagnie IBM France SAS
Original Assignee
Compagnie IBM France SAS
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 Compagnie IBM France SAS filed Critical Compagnie IBM France SAS
Priority to FR7108190A priority Critical patent/FR2127450A5/fr
Priority to JP530772A priority patent/JPS5422730B1/ja
Priority to GB405172A priority patent/GB1318499A/en
Priority to DE2208367A priority patent/DE2208367A1/de
Application granted granted Critical
Publication of FR2127450A5 publication Critical patent/FR2127450A5/fr
Expired 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
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/08—Arrangements for combining channels
    • 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
    • H04Q1/457—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling with conversion of multifrequency signals into digital signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Circuits Of Receivers In General (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)
FR7108190A 1971-03-03 1971-03-03 Expired FR2127450A5 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
FR7108190A FR2127450A5 (de) 1971-03-03 1971-03-03
JP530772A JPS5422730B1 (de) 1971-03-03 1972-01-12
GB405172A GB1318499A (en) 1971-03-03 1972-01-28 Multifrequency receiver
DE2208367A DE2208367A1 (de) 1971-03-03 1972-02-23 Mehrfrequenzempfaenger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7108190A FR2127450A5 (de) 1971-03-03 1971-03-03

Publications (1)

Publication Number Publication Date
FR2127450A5 true FR2127450A5 (de) 1972-10-13

Family

ID=9073232

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7108190A Expired FR2127450A5 (de) 1971-03-03 1971-03-03

Country Status (4)

Country Link
JP (1) JPS5422730B1 (de)
DE (1) DE2208367A1 (de)
FR (1) FR2127450A5 (de)
GB (1) GB1318499A (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936801A (en) * 1974-09-12 1976-02-03 Bell Telephone Laboratories, Incorporated Multifrequency signal receiver timing circuit
CA1031086A (en) * 1976-03-03 1978-05-09 Northern Electric Company Method and apparatus for translating multiple frequency signalling
DE3026016C2 (de) * 1980-07-09 1984-12-13 Siemens AG, 1000 Berlin und 8000 München Schaltungsanordnung zur Demodulation von Frequenzgemischen, die an einer Zentralstation empfangen werden

Also Published As

Publication number Publication date
GB1318499A (en) 1973-05-31
JPS5422730B1 (de) 1979-08-08
DE2208367A1 (de) 1973-10-25
JPS4731512A (de) 1972-11-11

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Legal Events

Date Code Title Description
ST Notification of lapse
RC Opposition against decision of lapse
DA Annulment of decision of lapse
ST Notification of lapse