DIFF Subgroup
H04Q 5/14 Signalling by pulses
Introduced: September 1968
Full Title
Full titles differ between systems:
IPC:
Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange > with direct connection for all subscribers, i.e. party-line system > Signalling by pulses
CPC:
Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange > with direct connection for all subscribers, i.e. party-line systems (H04Q5/24 takes precedence) > Signalling by pulses
IPC and CPC are identically structured here. All 1 subcodes exist in both systems.
Child Classifications
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