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1·For example, if you have a mouse and modem installed, the following commands illustrate possible links between these components and the actual device files.

举例来说，如果你有，一个鼠标而且调制解调器安装，下列的指令举例说明这些元件和真实的装置文件之间的可能的联结。

2·And its communication principle base on analyse of MODEM control Commands is discussed.

在分析MODEM控制命令集的基础上，讨论了单片机系统与MODEM之间的通信机理。