TRIMBLE-CMR协议的最原始出处，对理解CMR协议和RTCM协议有很大的帮助。-The original source of the TRIMBLE-CMR protocol, CMR protocol and RTCM protocol to the understanding of great help.

为适应这种通信模式，同时实现高效、差错控制的基本要求，国际上制定了RTCM 10403.2标准-In order to adapt to this kind of communication mode, and realize the basic requirements of high efficiency, error control, established RTCM 10403.2 on international standards