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文章针对ＰＣ机间的串行通信所存在的问题，提出一种无需调制解调器、无需电话网支持的高可靠中程距离的串行通信新方法。
Aiming at the existing problems of serial communication between PCs, this paper proposes a new method of serial communication with high reliability and medium distance without the need of modem and telephone network.