Patent ID: 8391827

Claim:
A Reverse 911 Alarm System for transmitting an alarm indication to individuals served by at least one of a cellular communication network and an alarm system to warn individuals of a hazard condition, comprising: an alarm controller means, responsive to receipt of alarm data indicative of the presence of a hazard condition, for generating at least one alarm indication; a hazard coverage area determination means for dynamically defining a coverage area indicative of a geographical extent of the hazard condition, including a list of cell sites that provide cellular service to the coverage area indicative of the geographical extent of the hazard condition; a hazard alarm distribution control means for transmitting the alarm indication to cell site controllers which are associated with the cell sites in the list of cell sites having a communication coverage corresponding to the geographical extent of said hazard condition; a cellular communication device identification means, operational in each of the cell site controllers which are associated with the cell sites in the list of cell sites, for identifying all cellular communication devices which are active in the cell site; a cellular multicast means, operational in the cell site controllers which are associated with the cell sites in the list of cell sites, for concurrently transmitting the alarm indications via a single multicast to a plurality of the identified cellular communication devices to generate human sensible output to warn individuals who use said cellular communication devices of the hazard condition; and an alarm system alarm indication communication means, communicatively connected to a plurality of alarm systems, for transmitting at least one of said alarm indications via selected ones of said plurality of alarm systems to an associated plurality of output devices served by the alarm system to generate human sensible output to warn said individuals who are located in a coverage area of said output devices of said hazard condition.