BE437349A - - Google Patents

Info

Publication number
BE437349A
BE437349A BE437349DA BE437349A BE 437349 A BE437349 A BE 437349A BE 437349D A BE437349D A BE 437349DA BE 437349 A BE437349 A BE 437349A
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 BE437349A publication Critical patent/BE437349A/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)
BE437349D 1939-01-25 BE437349A (zh)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE212745X 1939-01-25

Publications (1)

Publication Number Publication Date
BE437349A true BE437349A (zh)

Family

ID=5809651

Family Applications (1)

Application Number Title Priority Date Filing Date
BE437349D BE437349A (zh) 1939-01-25

Country Status (3)

Country Link
BE (1) BE437349A (zh)
CH (1) CH212745A (zh)
FR (1) FR868478A (zh)

Also Published As

Publication number Publication date
FR868478A (fr) 1941-12-31
CH212745A (de) 1940-12-15

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