NL143398B - Ontvanginrichting voor toonfrequent gecodeerde signalen. - Google Patents

Ontvanginrichting voor toonfrequent gecodeerde signalen.

Info

Publication number
NL143398B
NL143398B NL282657A NL282657A NL143398B NL 143398 B NL143398 B NL 143398B NL 282657 A NL282657 A NL 282657A NL 282657 A NL282657 A NL 282657A NL 143398 B NL143398 B NL 143398B
Authority
NL
Netherlands
Prior art keywords
tone
receiver
coded signals
frequently coded
frequently
Prior art date
Application number
NL282657A
Other languages
English (en)
Original Assignee
Bell Telephone Mfg
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 Bell Telephone Mfg filed Critical Bell Telephone Mfg
Publication of NL143398B publication Critical patent/NL143398B/nl

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)
  • Noise Elimination (AREA)
NL282657A 1961-08-30 1962-08-30 Ontvanginrichting voor toonfrequent gecodeerde signalen. NL143398B (nl)

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
NL143398B true NL143398B (nl) 1974-09-16

Family

ID=7457785

Family Applications (2)

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

Family Applications Before (1)

Application Number Title Priority Date Filing Date
NL282657D NL282657A (nl) 1961-08-30

Country Status (4)

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

Also Published As

Publication number Publication date
NL282657A (nl)
BE621906A (nl)
DE1141348B (de) 1962-12-20
CH402965A (de) 1965-11-30

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Legal Events

Date Code Title Description
VJC Lapsed due to non-payment of the due maintenance fee for the patent or patent application
NL80 Abbreviated name of patent owner mentioned of already nullified patent

Owner name: BELL TELE