characterised by the transmission medium

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

Of 8 combined children, 4 exist in both systems.

4 codes are CPC-only extensions.

IPC defines codes here since 1990.

Child Classifications

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G08B 25/012 CPC only CPC only
G08B 25/014 CPC only CPC only
G08B 25/016 CPC only CPC only
G08B 25/018 CPC only CPC only
G08B 25/04 using a single signalling line, e.g. in a closed loop since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G08B 25/06 using power transmission lines since 1990 IPC+CPC Available in IPC and CPC
G08B 25/08 using communication transmission lines since 1990 +1 CPC IPC+CPC Available in IPC and CPC
G08B 25/10 using wireless transmission systems since 1990 IPC+CPC Available in IPC and CPC