| 摘要 |
PURPOSE:To offer a portable telephone set. CONSTITUTION:At the time of transmission, a transmission switch 27 and dialing circuit 28 respectively send a call signal and the telephone number of a telephone set 1 to an exchange 3 to start a calling state with the telephone set 1. At the time of termination, a frequency tuning circuit 20 detects a subscriber's number outputted from the exchange 3 and drives a buzzer 21 to inform termination and a response circuit 23 sends a response signal to the exchange 3 to start a calling state with the telephone set 1. Communication with the exchange 3 is executed by radio waves through a MODEM 29. |
