| 摘要 |
PROBLEM TO BE SOLVED: To search a device in an early stage even in the case of loss, robbery, etc., and to prevent its illegal use by making prescribed response at the time of an incoming call from other communication devices, fixing a caller telephone number hereafter to an optional number and inhibiting it from reading its own memory. SOLUTION: When an owner calls a mobile station 1 and the ring count of calling tone reaches a specified count, a controlling part 7 sends a response message. When the password number that is sent to the station 1 by the owner and a prescribed password number coincide, the part 7 placed the station 1 under a state where the other station 31 can perform an remote operation. When the owner sends an originating destination telephone number setting signal which fixed a caller telephone number of the station 1, the part 7 stores the originating destination telephone number in memory and sends an originating destination telephone number setting completion tone from a sound processing part 5. As long as the originating destination telephone number setting is not canceled, the station 1 can not call a station number except the set number of can not read memory. |
