TELEPHONE SYSTEM, KEY TELEPHONE SET, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To enable a radio slave set to know an individual service generated in a belonging telephone set at a moving destination, even when the radio slave set is moving to another telephone set. SOLUTION: A system control means 14B for exchanging a variety of information with another telephone set 1 via a connection line 5 for connecting respective telephone sets is provided. This means 14B acquires individual service history information 15C about the radio slave set stored in the telephone set to which the slave set belongs to, from the telephone set that the the slave set belongs to which is connected by a radio line, and transmits the individual service history information to the radio slave set via the radio line. Also, an information storing device is connected to the connection line 5, and the individual service history information is exchanged between the respective telephone sets via the information storing device. COPYRIGHT: (C)2004,JPO