TREA

Calling by using amplitude or polarity of dc

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Industry

  • CPC
  • H04Q9/06
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Parent Industries

HELECTRICITY H04Electric communication H04QSELECTING H04Q9/00Arrangements 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

Current Industry

H04Q9/06Calling by using amplitude or polarity of dc
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