| 摘要 |
PURPOSE:To enable the communication at the same time with the condition that the closeness with the telephone set main body is mitigated for a plurality of people using one telephone set, by the constitution that the telephone set main body and a plurality of transmitters and receivers can be communicated with radio. CONSTITUTION:The telephone set main body 1 transmits the radio frequency signal frequency-modulating the carrier in specific frequency f0 to the transmitters and receivers 2a, 2b, 2c with the antenna 4 by means of communication signal fed on cables. This signal wave is received on the antennas 5a, 5b, 5c at the transmitters and receivers 2a, 2b, 2c and reproduced with the respective internal reception circuit. On the other hand, radio signal waves having specific carrier frequencies f1, f2, f3 are transmitted from the transmitters and receivers 2a, 2b, 2c and the telephone set main body 1 receives the different frequencies f1, f2 and f3. |
