DIFF Subgroup
G08B 25/04 using a single signalling line, e.g. in a closed loop
Introduced: January 1990
Full Title
Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems > characterised by the transmission medium > using a single signalling line, e.g. in a closed loop
Of 1 combined children, 0 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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