| 摘要 |
PURPOSE:To transmit data even during speaking by providing two independent radio channels, using one channel just for speaking and using the other channel just for data transmission. CONSTITUTION:An output signal from a transmitter 43 of a hand set 30 is passed through a transmission circuit 41, antenna multicoupler 40 and antenna 39, received at an antenna 22 of a base unit 10 and transmitted through an antenna multicoupler 21 at the host machine 10, reception circuit 20, two-wire/ four-wire conversion circuit 18 and telephone line 1 to the party. When simultaneously transmitting data from the hand set 30, the data are received from a data input/output device 38 at the hand set 30 through a CPU 36, MODEM 35, transmission circuit 33, antenna multicoupler 32 and antenna 31 to an antenna 17 at the host machine 10 and transmitted through an antenna multicoupler 16 at the host machine 10, reception circuit 15, MODEM 13 and CPU 11 to a data input/output device 12. Thus, since one radio channel is used for speaking and the other radio channel is used for data transmission, the data transmission is possible even during speaking. |
