| 摘要 |
PURPOSE:To move a communication terminal equipment freely without limit to cable length by connecting the communication terminal equipment to a wired communication line via a slave set and a master set and making communication the master set and the slave set in terms of radio wave. CONSTITUTION:Since a call signal is detected by a detection circuit 107, a generating circuit 108 generates a 2nd call signal and changeover switches 104, 105 are connected to the position (b). The 2nd call signal is FM-demodulated and outputted from a receiver 210 of a slave set 200. Since the 2nd call signal is detected by a detection circuit 211, a generating circuit 212 generates a call signal and changeover switches 205, 206 are connected to the position (b). Since a detection circuit 203 of the slave set 200 detects a low or a high voltage corresponding to a dial pulse from a MODEM 2, a transmitter 208 of the slave set 200 is operated in response to the dial pulse.
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