Multi-subscriber alarm system with central receiving and...

Details Multi-subscriber alarm system with central receiving and... Multi-subscriber alarm system with central receiving and...

G - Physics

08

B

379/3, 340/86

G08B 25/00 (2006.01) G08B 25/01 (2006.01)

Patent

CA 1057833

A B S T R A C T An alarm system for a number of individual subscribers connected to a central installation in which each subscriber can signal the central installation when help is needed and the central installation can signal back to the subscriber indicating receipt of the call. The subscriber can make further calls and receiver signals from the central installation in return.

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