NL282657A - - Google Patents

Info

Publication number
NL282657A
NL282657A NL282657DA NL282657A NL 282657 A NL282657 A NL 282657A NL 282657D A NL282657D A NL 282657DA NL 282657 A NL282657 A NL 282657A
Authority
NL
Netherlands
Application number
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.)
Publication of NL282657A publication Critical patent/NL282657A/xx

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/30Systems using multi-frequency codes wherein each code element is represented by a combination of frequencies
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04QSELECTING
    • H04Q1/00Details of selecting apparatus or arrangements
    • H04Q1/18Electrical details
    • H04Q1/30Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/45Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using multi-frequency signalling
    • H04Q1/453Signalling 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)
  • Noise Elimination (AREA)
NL282657D 1961-08-30 NL282657A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEST18261A DE1141348B (de) 1961-08-30 1961-08-30 Empfangseinrichtung fuer ein tonfrequentes Code-Signalverfahren mit mehreren Signalfrequenzgruppen in Fernsprechvermittlungsanlagen

Publications (1)

Publication Number Publication Date
NL282657A true NL282657A (fr)

Family

ID=7457785

Family Applications (2)

Application Number Title Priority Date Filing Date
NL282657D NL282657A (fr) 1961-08-30
NL282657A NL143398B (nl) 1961-08-30 1962-08-30 Ontvanginrichting voor toonfrequent gecodeerde signalen.

Family Applications After (1)

Application Number Title Priority Date Filing Date
NL282657A NL143398B (nl) 1961-08-30 1962-08-30 Ontvanginrichting voor toonfrequent gecodeerde signalen.

Country Status (4)

Country Link
BE (1) BE621906A (fr)
CH (1) CH402965A (fr)
DE (1) DE1141348B (fr)
NL (2) NL143398B (fr)

Also Published As

Publication number Publication date
BE621906A (fr)
NL143398B (nl) 1974-09-16
DE1141348B (de) 1962-12-20
CH402965A (de) 1965-11-30

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