企业VOIP应用解决方案，短小精悍，有拓扑图
Enterprise VOIP application solutions, short and pithy, with topology (2010-10-25, WORD, 49KB, 下载17次)
这是据说很热的协议SIP的中文版本强烈推荐
This is a very hot day the agreement was said to the Chinese version of SIP strongly recommended (2006-11-20, WORD, 996KB, 下载10次)