中文摘要：

采用佳盈公司生产的VDS103串口设备服务器构建了基于以太网的分布式数控DNC通讯系统。利用Win32多线程技术开发出网络环境下的通讯软件，实现了一台计算机同时与网络中多台具有RS一232C接口的数控机床进行远程双向通讯与管理，为实现设备层面的网络化制造与管理奠定了基础。

英文摘要：

Direct numeric control （DNC） communication system based on Ethernet was designed using serial port server of VDS103. The communication software under network environment was developed by Win32 muhithread technology, which realizes remote bidirectional communication and management at the same time for a computer with many NC machine tools with RS-232C interface in the network.