City tie line connection for fire alarm system

Details City tie line connection for fire alarm system City tie line connection for fire alarm system

G - Physics

08

B

340/102

G08B 25/00 (2006.01) G08B 26/00 (2006.01)

Patent

CA 2013609

CITY TIE LINE CONNECTION FOR FIRE ALARM SYSTEM ABSTRACT Improvement to a fire alarm system that enables a city tie line connection to be made selectively. Terminal units at a variety of locations are coupled or connected in separate, independent loops within the system such that serial synchronous power transmission and data communication is effectuated over the individual loops. A master controller at a central location is programmed to recognize that certain terminal units connected in particular loops of the system are in alarm states and to cause a city tie line connection to be made, selectively, whereby a municipal fire department or the like is informed of the particularly critical alarms emanating from those terminal units.

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