| 摘要 |
PURPOSE:To prevent an emergency alarm from being unheard by constituting the titled system by a reception section for emergency alarm broadcast, an alarm discrimination section outputting an alarm output signal and an emergency broadcast section so as to allow plural positions to listen to the emergency alarm via a talking terminal equipment. CONSTITUTION:An emergency broadcast means 6 is always energized to cope with the reception state of an emergency broadcast, which is received from a reception section 10 via an antenna 9. The set reception frequency is received selectively by a tuner section and a filter circuit and an FSK demodulation circuit detect a code data representing the alarm condition included in a start signal. The code data comprising the digital signal is inputted to an alarm discrimination section 12, where the data is decoded to detect the alarm condition such as kind of emergency alarm and alarm raising district. When the alarm output signal is outputted, an emergency broad-cast section 13 is operated to connect all talking terminal equipments 1a-1c to the talking line of a signal line 3 to set the mode to the extension simultaneous broadcast mode.
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