BE523338A - - Google Patents

Info

Publication number
BE523338A
BE523338A BE523338DA BE523338A BE 523338 A BE523338 A BE 523338A BE 523338D A BE523338D A BE 523338DA BE 523338 A BE523338 A BE 523338A
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 BE523338A publication Critical patent/BE523338A/xx

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
    • H04Q1/446—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency
    • H04Q1/4465—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies using one signalling frequency the same frequency being used for all signalling information, e.g. A.C. nr.9 system

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
  • Burglar Alarm Systems (AREA)
BE523338D 1952-01-30 BE523338A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB254852A GB701622A (en) 1952-01-30 1952-01-30 Improvements in and relating to voice frequency signal receivers

Publications (1)

Publication Number Publication Date
BE523338A true BE523338A (en)

Family

ID=9741528

Family Applications (1)

Application Number Title Priority Date Filing Date
BE523338D BE523338A (en) 1952-01-30

Country Status (2)

Country Link
BE (1) BE523338A (en)
GB (1) GB701622A (en)

Also Published As

Publication number Publication date
GB701622A (en) 1953-12-30

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