In the fire information system where it is jointed by the fire receiver and this fire receiver which

摘要

PROBLEM TO BE SOLVED: To provide a fire alarm system provided with an inspection function which can recognize whether a fire receiver normally operates or not by hearing the ringing pattern of an area sound device in a building of a large scale. ;SOLUTION: Whenever a fire receiver 1 receives a fire signal at the time of conducting an alarming test of a fire sensor, it discriminates the line number of a sensor line L1 to which the fire sensor is connected, regulates the discriminated line number with the combination of the on/off periods of the signal, transmits it to the area sound device corresponding to the fire sensor and rings the area sound device based on the transmitted signal.;COPYRIGHT: (C)2000,JPO