JPS4731512A - - Google Patents

Info

Publication number
JPS4731512A
JPS4731512A JP530772A JP530772A JPS4731512A JP S4731512 A JPS4731512 A JP S4731512A JP 530772 A JP530772 A JP 530772A JP 530772 A JP530772 A JP 530772A JP S4731512 A JPS4731512 A JP S4731512A
Authority
JP
Japan
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.)
Pending
Application number
JP530772A
Other languages
Japanese (ja)
Other versions
JPS5422730B1 (cg-RX-API-DMAC10.html
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 filed Critical
Publication of JPS4731512A publication Critical patent/JPS4731512A/ja
Publication of JPS5422730B1 publication Critical patent/JPS5422730B1/ja
Pending 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)
  • Electrodes For Compound Or Non-Metal Manufacture (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Dc Digital Transmission (AREA)
  • Circuits Of Receivers In General (AREA)
JP530772A 1971-03-03 1972-01-12 Pending JPS5422730B1 (cg-RX-API-DMAC10.html)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7108190A FR2127450A5 (cg-RX-API-DMAC10.html) 1971-03-03 1971-03-03

Publications (2)

Publication Number Publication Date
JPS4731512A true JPS4731512A (cg-RX-API-DMAC10.html) 1972-11-11
JPS5422730B1 JPS5422730B1 (cg-RX-API-DMAC10.html) 1979-08-08

Family

ID=9073232

Family Applications (1)

Application Number Title Priority Date Filing Date
JP530772A Pending JPS5422730B1 (cg-RX-API-DMAC10.html) 1971-03-03 1972-01-12

Country Status (4)

Country Link
JP (1) JPS5422730B1 (cg-RX-API-DMAC10.html)
DE (1) DE2208367A1 (cg-RX-API-DMAC10.html)
FR (1) FR2127450A5 (cg-RX-API-DMAC10.html)
GB (1) GB1318499A (cg-RX-API-DMAC10.html)

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
DE2208367A1 (de) 1973-10-25
GB1318499A (en) 1973-05-31
FR2127450A5 (cg-RX-API-DMAC10.html) 1972-10-13
JPS5422730B1 (cg-RX-API-DMAC10.html) 1979-08-08

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