| 摘要 |
PURPOSE:To eliminate completely an opportunity of invalidating an incoming call due to a delayed provision of the portable telephone set because the portable telephone set is contained in a business bag and the incoming call is set to the holding state by the operation of a holding signal transmitter before the portable telephone set is taken out when a call audible tone signal is heard. CONSTITUTION:When a carrier of a portable telephone set 24 mounts a small sized hold signal transmitter 40 with a retainer to e.g. a coat and listens to a call audible signal from a speaker 34 of the portable telephone set 24, the hold signal is sent by the control of an operation button 41 and the portable telephone set 24 receives it and a hold signal generating section 36 uses the hold signal received by a radio base station 23. When a telephone exchange 21 receives a hold signal via the radio base station 23, the exchange replies a relevant incoming call to set the call to the holding state. |
