| 摘要 |
PROBLEM TO BE SOLVED: To provide a crime preventing system which securely prevents a crime without special equipment investment through the use of an existing PHS line. SOLUTION: In a crime preventing system, an operator is allowed to depress a switch installed in a crime preventing terminal that can be connected to a PHS public base station 6 by a radio signal when an urgent situation occurs. Thus, warning sound for the occurrence of the urgent situation is outputted from a speaker that the public base station installed in a block where a crime preventing bell locates in simultaneous call areas A-C has.
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