NL263599A - - Google Patents

Info

Publication number
NL263599A
NL263599A NL263599DA NL263599A NL 263599 A NL263599 A NL 263599A NL 263599D A NL263599D A NL 263599DA NL 263599 A NL263599 A NL 263599A
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 NL263599A publication Critical patent/NL263599A/xx
Priority claimed from GB1312860A external-priority patent/GB874380A/en
Priority claimed from DEST18261A external-priority patent/DE1141348B/en

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)
NL263599D 1960-04-13 NL263599A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB3131264X 1960-04-13
GB1312860A GB874380A (en) 1960-04-13 1960-04-13 Improvements in or relating to multi-frequency signalling receivers
GB1128895X 1960-04-13
FR858367A FR1286232A (en) 1960-04-13 1961-04-11 Improvements to multi-frequency signaling receiving systems
DEST18261A DE1141348B (en) 1961-08-30 1961-08-30 Receiving device for an audio frequency code signal method with several signal frequency groups in telephone exchanges

Publications (1)

Publication Number Publication Date
NL263599A true NL263599A (en)

Family

ID=27512242

Family Applications (1)

Application Number Title Priority Date Filing Date
NL263599D NL263599A (en) 1960-04-13

Country Status (2)

Country Link
FR (1) FR1286232A (en)
NL (1) NL263599A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1451816A (en) * 1972-12-29 1976-10-06 Siemens Ag Systems for monitoring the level of a received alternating- current signal and for indicating whether said received signal has a particular one of a plurality of predetermined frequencies
FR2272549A1 (en) * 1974-05-21 1975-12-19 Gabry Andre Frequency coded signal receiving and decoding device - has channels with fixed frequency and converting circuits

Also Published As

Publication number Publication date
FR1286232A (en) 1962-03-02

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