中继台，是在无线对讲系统中，用于增大通讯距离，扩展覆盖范围的设备。中继台又称中转台、转发台、差转台，是专用移动通信领域不可缺少的重要设备。中继台的作用就是中转和放大信号。用于增大通讯距离，扩展信号覆盖范围。
如果你不能够很好的听到中继台信号，那也就很难将正确的信息反馈给对方。
If you can't hear the repeater itself well, it will be difficult to report back accurate information to the other station.
讯号转换中继台的建置有三个目的，一为拓展基地台之覆盖范围，二为消弭覆盖范围内的死角，三是提升基地台覆盖边缘的吞吐量。
The first is to extend the coverage area of one base station. The second is to eliminate the coverage holes. The third, to enhance the throughput on the cell edge.
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