| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a crime prevention system, a receiver, a ringing sound control device, and a warning signal receiver capable of reporting also abnormality that cannot be detected, or the like by an abnormality output machine by allowing a sound ringing machine to sound in addition to abnormality that can be detected, or the like by the abnormality output machine installed in a monitoring area.SOLUTION: A crime prevention system 1 is configured so as to communicably connect a detector 20 installed in a monitoring area to a receiver 10. The crime prevention system 1 includes: a warning signal receiver 60 for receiving an external warning signal outputted from the outside of the monitoring area; and a ringing sound control device 50 for setting a ringing sound when allowing emergency bells 30, 41 to sound based on an abnormal signal outputted from the detector 20 and a ringing sound when allowing the emergency bells 30, 41 to sound based on a warning signal outputted from the warning signal receiver 60 to be mutually different ringing sounds.</p> |
