BUILDING DOOR LOCKING/UNLOCKING SYSTEM

PROBLEM TO BE SOLVED: To provide a building door locking/unlocking system for easily and securely registering a portable machine. SOLUTION: A controller 14 of a locking/unlocking device installed on the building door side switches to the registration mode by a registration switch 22. When an ID code is transmitted by operating a transmission switch button 51 of the portable machine 50, the controller 14 sets a call code corresponding to the ID code received from the portable machine and stores it in the memory, and further it transmits a call setting code signal prepared by adding the call code to the received ID code. The portable machine reads out the call code from the received call setting code signal and stores it in the storage section. COPYRIGHT: (C)2004,JPO