通过SONET/SDH和/或多路复用器系统,RS422接口可用于单通道或双通道情况。当用于单通道情况时,RS422接口采用Tx、Rx、和发送定时的典型方式与更高阶系统连接。然而,当作为双通道应用时,由于两个RS422通道采用一个时钟输入
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