摘要 |
PURPOSE:To reply a call with a portable telephone set by transferring a call to a wire telephone set when the portable telephone set is carried, that is, the user is absent. CONSTITUTION:When telephone sets having different telephone number such as a wire telephone set FTEL and a radio portable telephone set PTEL are used in common, the radio portable telephone set PTEL informs its state to a radio system controller RCE via fixed radio stations FRS 1-m according to a predetermined protocol to transfer wire telephone numbers xsi2011-2013 used in common by operating the radio portable telephone set PTEL or it is dismounted from a prescribed position. The radio system controller RCE receiving the notice transfers and sets the transfer wire telephone numbers xsi2011-2013 of the wire telephone set FTEL to the portable telephone set PTEL. Thus, a call reaching the wire telephone set FTEL while the user leaves his set position is transferred to the portable telephone set PTEL. |