TELEPHONE SYSTEM, KEY TELEPHONE SYSTEM AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To enable a user to answer an individual incoming call received by a telephone system belonging to the user at his/her destination even when a radio slave unit is moved to another telephone system. SOLUTION: When an individual incoming call comes to an incommunicable radio slave unit belonging to a self-system, a movement managing means of the telephone system 1A belonging to the user inquires the location of the radio slave unit from the other telephone system through a connection line, and an incoming call transfer control means transfers the individual incoming call to a telephone system 1C at the destination, the location of which is confirmed. In addition, a movement managing means of the telephone system 1C at the destination notifies the telephone system 1A belonging to the user of the location of the slave unit belonging to the other telephone system through the connection line 5, and an incoming call transfer control means of the telephone system 1A belonging to the user transfers an individual incoming call to the telephones system 1C at the destination on the basis of the previous location notification when the individual incoming call comes to the incommunicable radio slave belonging to the self-system. COPYRIGHT: (C)2004,JPO