可以侦听最多两个串口的数据， 主要是为了调试通讯设备使用， 尤其是各种modem, 因为内置了cmux解析功能， 非常方便阅读。-Can listen for up to two serial data communication equipment mainly used for debugging, especially the variety of modem, because the built-cmux parsing, very easy to read.

linux使用伪终端进行通讯的例子. 这对于在终端下使用PPPD程序上网的手机终端用户实现CMUX协议很有用-linux using the pseudo-terminal communication example. This is the end-use mobile phone Internet PPPD procedures to achieve the end-user agreement CMUX useful

标准的CMUX协议文档，对虚拟1对多机通讯很有帮助-gsm cmux