TELEPHONE SERVICE SYSTEM USING PORTABLE RADIO DISPLAY DEVICE

PURPOSE:To obtain the information on the incoming call from the third person, etc. without deteriorating the talking quality, by displaying various types of service information at a portable radio display device during or before and after the talking using a wire telephone. CONSTITUTION:The subscriber of a wire telephone terminal 1 at the calling side registers first the correlation between the identification number of a portable radio display terminal 2 he or she carries and his or her own identification number at a control station 5 of the portable radio display device via a centralized controller 3. Then a call is transmitted from the terminal 1 to a terminal 8. If a call is given to the terminal 1 from the 3rd terminal 9 in a busy mode, the incoming call is transmitted to the controller 3 from a busy call receiving device 7. At the same time, a centralized controller 11 of the other side detects the busy state of the terminal 1. Thus the dial number of the terminal 1 and the identification mark of the terminal 9 are sent to a base station 6. Then a busy incoming call is displayed at the terminal 2 by the information given from the station 6.