DIFF Subgroup
H04Q 9/14 Calling by using pulses
Introduced: September 1968
Full Title
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 > Calling by using pulses
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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