Patent ID: 7385517
Filing Date: 2008-06-10
Classification: G08B

Abstract:
1. A system including a plurality of life safety devices, the system comprising: a plurality of wired life safety devices configured to sense a hazardous condition, wherein each of the wired life safety devices is connected to one or more of the other wired life safety devices using one or more wires, and wherein each of the wired life safety devices communicates with one or more of the other wired life safety devices using the wires; at least one wireless life safety device configured to sense the hazardous condition; and a gateway life safety device including a sensor configured to sense the hazardous condition, wherein the gateway life safety device is wired to at least one of the wired life safety devices, and wherein the gateway life safety device communicates with one or more of the wired life safety devices using the wires, and wherein the gateway life safety device communicates wirelessly with the wireless life safety device; wherein the wired life safety devices communicate with the wireless life safety device through the gateway life safety device; wherein the gateway life safety device enters a master mode if the gateway life safety device is in an alarm none mode and the life safety device senses the hazardous condition, the gateway life safety device sending out a wired alarm signal to the wired life safety device and a wireless alarm signal to the wireless life safety device, and the gateway life safety device remaining in the master mode until the gateway life safety device no longer senses the hazardous condition; wherein the gateway life safety device enters a hardwire slave mode if the gateway life safety device is in the alarm none mode and the life safety device receives a wired interconnect signal from the wired life safety device, the gateway life safety device sending out the wireless alarm signal to the wireless life safety device, and the gateway life safety device remaining in the hardwire slave mode until the wired interconnect signal times out; and wherein the gateway life safety device enters a wireless slave mode if the gateway life safety device is in the alarm none mode and the life safety device receives a wireless interconnect signal from the wireless life safety device, the gateway life safety device sending out the wired alarm signal to the wired life safety device, and the gateway life safety device remaining in the wireless slave mode until the wireless interconnect signal times out.