| 摘要 |
PROBLEM TO BE SOLVED: To eliminate restrictions on the installation place of a receiving master unit terminal by providing a fire alarm itself with a relay function to relay a fire detection signal, even if the radio wave output of the fire alarm is small.SOLUTION: The fire alarm 1 includes a fire alarm communication unit for radio-transmitting a fire detection signal or the like, and a fire alarm control unit for performing relay control of fire detection signals radio-transmitted from other fire alarms 1 and call signals radio-transmitted from a calling device 2. The calling device 2 includes a call communication unit for radio-transmitting call signals or the like, and a call control unit for performing relay control of the fire detection signals radio-transmitted from the fire alarm 1 and the call signals radio-transmitted from the calling device 2. The master unit terminal 3 includes a master unit communication unit for receiving the fire detection signals transmitted from the fire alarm 1 and the call signals transmitted from the calling device 2 and a master unit control unit for reading signals received from the fire alarm 1 and the calling device 2 to control the informing operation of a sound informing unit and a display unit. |
