CH539991A - Ubertragungsverfahren für Mehrfrequenzcodezeichen in Fernmeldeanlagen - Google Patents

Ubertragungsverfahren für Mehrfrequenzcodezeichen in Fernmeldeanlagen

Info

Publication number
CH539991A
CH539991A CH129872A CH129872A CH539991A CH 539991 A CH539991 A CH 539991A CH 129872 A CH129872 A CH 129872A CH 129872 A CH129872 A CH 129872A CH 539991 A CH539991 A CH 539991A
Authority
CH
Switzerland
Prior art keywords
transmission method
telecommunications systems
frequency code
code characters
characters
Prior art date
Application number
CH129872A
Other languages
English (en)
Inventor
Bardl Artur
Original Assignee
Siemens Ag
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
Priority claimed from DE19712106627 external-priority patent/DE2106627C/de
Application filed by Siemens Ag filed Critical Siemens Ag
Publication of CH539991A publication Critical patent/CH539991A/de

Links

Classifications

    • 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
    • H04Q1/4535—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 with an additional signal transmitted for voice protection

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
CH129872A 1971-02-12 1972-01-28 Ubertragungsverfahren für Mehrfrequenzcodezeichen in Fernmeldeanlagen CH539991A (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712106627 DE2106627C (de) 1971-02-12 Übertragungsverfahren fur Mehr frequenzcodezeichen in Fernmelde ins besondere Fernsprechanlagen

Publications (1)

Publication Number Publication Date
CH539991A true CH539991A (de) 1973-07-31

Family

ID=5798541

Family Applications (1)

Application Number Title Priority Date Filing Date
CH129872A CH539991A (de) 1971-02-12 1972-01-28 Ubertragungsverfahren für Mehrfrequenzcodezeichen in Fernmeldeanlagen

Country Status (3)

Country Link
AT (1) AT319346B (de)
CH (1) CH539991A (de)
IT (1) IT947375B (de)

Also Published As

Publication number Publication date
IT947375B (it) 1973-05-21
DE2106627A1 (de) 1972-07-13
DE2106627B2 (de) 1972-07-13
AT319346B (de) 1974-12-10

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Legal Events

Date Code Title Description
PL Patent ceased