培养学生通过在有线局域网上的软件编程模拟，实现呼叫应答的点-点通信，从而了解和熟悉呼叫应答的点-点通信方式，这也是现代通信系统与计算机通信的一个重要的基本原理和应用技术基础-Students through the wired LAN simulation software to achieve the point of call response- point communication, to understand and familiar with the call answer poin