TELEPHONE SET FOR ISDN

PURPOSE:To form the telephone set for ISDN capable of acquiring the telephone number corresponding to the ID code by updating a given telephone set by making the ID code for each person and the telephone number of the nearby telephone set and sending the ID code to the telephone set. CONSTITUTION:After an ID set key 5a is operated, the input of the ID code is accepted from a registration key 3. After a key 5d registering the telephone number is operated, the input of the telephone number of the telephone set for registration is accepted. IN this case, after an ID register key 5b is operated, the ID code inputted to the telephone set for registration and the ID address data for registration including its own telephone number are sent. An ISDN telephone set 1 which accepts the ID address data for registration stores the data to an ID address table 13a. When an ID retrieval key 5c is operated without operating the ID register key 5b, the ID address data for retrieval including the ID code is sent to the telephone set for registering the telephone number. Thus, telephone number for call destination corresponding to the ID code which is registered in the ID address table 13a of the telephone set for registration is acquired.