DEVICE AND METHOD FOR SECURITY FOR PORTABLE TELEPHONE SYSTEM

PROBLEM TO BE SOLVED: To provide a security device with which an invasion to a structure such as house or building to become a security target and invasion or damage to an automobile or the like can be easily remotely monitored by utilizing the portable telephone set or PHS(R) telephone set of a wireless system. SOLUTION: Security communication equipment capable of communication between a portable telephone base station side for exchanging and connecting general telephone calls and a base station side is installed on the house or vehicle to become the security target, the security communication equipment is composed of a break part connected with a burglar sensor part for breaking the communication and a recovery part for recovering the break of the communication, the connection is confirmed by mutual communication between the base station side and the security communication equipment and when abnormality occurs, on the basis of abnormality detection by the burglar sensor, the security communication equipment forcedly breaks the communication with the base station side by the break part. Then, the base station side refuses the exchange connection of a telephone call from an external guard to the security communication equipment.