| 摘要 |
PURPOSE:To obtain a telephone set with high performance of convenience and portability by constituting the titled equipment of a radio transmission section, a radio reception section, and a telephone set section having a function capable of switching the speech between the radio transmission section and a handset to send to a telephone line and switching an incoming call to a loudspeaker section and the handset. CONSTITUTION:A call state informing means 19 informs an incoming call and the user turns on a power switch of a radio transmission section 23 by the information. The radio wave is sent and received by a radio reception section 12, and when a pilot or a carrier signal is detected for a prescribed time by a signal detection means 17, a control means 20 operates a switch 21 to close a DC loop between a telephone line 1 and a 2/4-wire conversion circuit 3. In this case, a hook switch 22 connects the circuit 3 to the loudspeaker means 4 and the radio reception section 20, a reception signal is outputted from the loudspeaker means 4 with loudspeaking, and a transmission signal of a transmission section 23 is sent to the telephone line. When the hook switch is hooked off, the switch 22 connects the circuit 3 to the handset 11. Thus, the operating position is not limited for the incoming call and the talking, the constitution of the radio section is simplified and small size and light weight are attained for the portable equipment. |
