BE512709A - - Google Patents

Info

Publication number
BE512709A
BE512709A BE512709DA BE512709A BE 512709 A BE512709 A BE 512709A BE 512709D A BE512709D A BE 512709DA BE 512709 A BE512709 A BE 512709A
Authority
BE
Belgium
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 BE512709A publication Critical patent/BE512709A/xx

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Noise Elimination (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
BE512709D 1951-07-10 BE512709A (en:Method)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT319073X 1951-07-10

Publications (1)

Publication Number Publication Date
BE512709A true BE512709A (en:Method)

Family

ID=11234479

Family Applications (1)

Application Number Title Priority Date Filing Date
BE512709D BE512709A (en:Method) 1951-07-10

Country Status (3)

Country Link
BE (1) BE512709A (en:Method)
CH (1) CH319073A (en:Method)
GB (1) GB710600A (en:Method)

Also Published As

Publication number Publication date
GB710600A (en) 1954-06-16
CH319073A (fr) 1957-01-31

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