很多单工的通讯设备可以通过语音检测技术的应用实现收发状态的自动转换而以比较小的代价达到双工设备的功能。

Many traditional single simplex communication devices now can act as a duplex system under the help of voice activated module, which is actual voice activity detector.

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如果设备能同时处理两个方向（例如上传，下载）上的数据传输，那么数据传输就是全双工的。

Data transfer is full duplex if it can handle data flowing in bothdirections (upload and download, for instance) simultaneously.

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“双工”这个词的一种不恰当的用法，但经常还是用来指万一出现故障时能代替原先设备的一组后备装置或计算设备。

Improper use of word duplex, but often meant to signify a second equipment or computing devices which would substitute for original equipment in case of failure.

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