FIRE ALARM SYSTEM CONSISTING

Brand	Owner	Address	Description
FIREPLEX	RAULAND-BORG CORPORATION	1802 W. Central Road Mount Prospect IL 60056	fire alarm system consisting of a microprocessor-controlled panel including a back-up mode operation in case of program failure, and microphone to allow emergency page;FIRE PLEX;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

Dual site supervision is provided for a control channel cellular radio for a fire alarm reporting system that uses logic that causes a control channel cellular transceiver to operate in a nonstandard manner and to use a different and second cellular base station or site that the unit would not normally select operating pursuant to a standard cell phone software module. The logic causes the control channel cellular transceiver to monitor and test through more than one cell base station or site, thereby meeting the dual communication path supervision requirement for UL listed communications systems for stand alone fire alarm reporting systems. The available cellular control channels are first scanned, and the signal strength of each cellular control channel is measured. Then the cellular control channel with the strongest signal strength and the cellular control channel with the second strongest signal strength which are verified as being available for the assigned carrier are selected to report the status of the fire alarm system. A cellular radio message on the status of the fire alarm system is transmitted over the cellular control channel with the strongest signal strength, or if unavailable over the cellular control channel with the second strongest signal strength.