说明：  基于Internet无服务视频技术原理；1、前沿；2、IP视频会议的技术原理及相应网络基础；3、IP视频会议童心的ＩＰ数据编译原理与分析；４、IP视频会议系统的网络构成；5、VoIP关键技术；6、关键设备以及VoIP网关；
(Based on the Internet without service video technology principle frontier , IP video conferencing technology principle and the corresponding network infrastructure 3, IP video conferencing innocence IP data compiler theory and analysis 4, IP video conferencing system network configuration 5 the the VoIP key technologies 6, key equipment, and VoIP gateway )