| 摘要 |
PROBLEM TO BE SOLVED: To attain control communication based upon cable connection and a radio relay by adding a transceiver to a controller and its relay and connecting also wire/wireless change-over switch. SOLUTION: A received signal received by a base station radio equipment is inputted to a relay 2-2' and corrected to a regulated level by an attenuator and an amplifier. When the wire/wirelss change-over switch is turned to a wirelss position, a transmitter is raised to execute transmission. When the relay 2-2' detects a voice in a received output, the rise of the transmitter is pressed. Since a controller 3 is previously set up to wireless communication so as to be matched with the relay 2-2', a signal is received by a receiver and outputted to a speaker as a monitor. On the other hand, a microphone input voice to the controller 3 is transmitted by a transmitter, received by a receiver in the relay 2-2' and transmitted to a base station radio equipment at a regulated level. When the relay 2-2' and the controller 3 are connected to a cable, the change-over switch 15 switched to wire side and communication voice is similarly transmitted/received. Consequently the controller 3 can be used in a movable state. |
