| 摘要 |
PROBLEM TO BE SOLVED: To provide plural earphone jacks, select a signal outputted to an earphone with a voice changeover switch, and let the user know telephone calling. SOLUTION: The portable telephone set 1 has a voice changeover switch 21 for signals outputted from earphone jacks 17 and 18 having an input/output function and a voice processing circuit 14 in the portable telephone set 1, and a control circuit 15 switches voices according to the operation state of the portable telephone. An audio signal outputted from an audio output device 3 is connected to the earphone jack 17 and outputted to an earphone connected to the earphone jack 18 through the voice changeover switch 21. When there is a call to the portable telephone sets, the control circuit 15 generates a calling signal in the portable telephone set by a voice processing circuit 14. |
