| 摘要 |
The invention is an improvement in efficient use of a radio communications channel, and for inhibiting transmission of an unwanted radio wave on a SCO communications link established between Bluetooth radio communications terminals as well as reducing power consumption. A sound signal that transmitted along a SCO communications link is detected. When the signal is absent, the communications link is once disconnected and, the communications link is connected again when a sound signal is detected. Instruction for disconnection and reconnection of a communications link may be done by a control signal coming from a call button provided on the communications terminals.
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