Patent ID: 8923755

Claim:
A wireless communication repeater system in a building comprising: a) a pre-existent hard wired emergency communication system conforming to a historical fire code standard including i) a central panel, ii) a plurality of access nodes, iii) a plurality of pairs of fired resistant wires, each pair of the plurality of pairs fire resistant wires connecting at least one access node of the plurality of access nodes to the central panel; b) a plurality of end units, at least two of the plurality of end units including, i) a respective wireless receiver for receiving a signal transmitted by a portable transceiver located in the building in an emergency audio band, and ii) a respective communication adaptor connecting said respective wireless receiver to at least one pair of fire resistant wires of said plurality of pairs of fire resistant wires; c) a controller including, i) a communication interface installed by retrofitting said central panel, said communication interface communicating with said plurality of end units over said plurality of pairs of fire resistant wires, and ii) a voter in communication with said communication interface and receiving respective versions of the signal communicated over said plurality of pairs of the fire resistant wires from each of said at least two end units, said voter outputting a single version of said signal, and d) a first network transmitter communicating with the voter receiving and retransmitting said single version of said signal.