BE357896A - - Google Patents

Info

Publication number
BE357896A
BE357896A BE357896DA BE357896A BE 357896 A BE357896 A BE 357896A BE 357896D A BE357896D A BE 357896DA BE 357896 A BE357896 A BE 357896A
Authority
BE
Belgium
Prior art keywords
signaling
devices
current
switch
line
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE357896A publication Critical patent/BE357896A/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q9/00—Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom
    • H04Q9/06—Calling by using amplitude or polarity of DC

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Selective Calling Equipment (AREA)
BE357896D BE357896A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Publications (1)

Publication Number Publication Date
BE357896A true BE357896A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Family

ID=31701

Family Applications (1)

Application Number Title Priority Date Filing Date
BE357896D BE357896A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

Country Status (1)

Country Link
BE (1) BE357896A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html)

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