DIFF Subgroup
H04Q 9/04 Arrangements for synchronous operation
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 > Arrangements for synchronous operation
No child classifications to compare. This is a leaf node in both IPC and CPC.