基于sip协议的VoIP、视频会议源码，对防火墙穿透协议支持较好，跨平台，支持Linux/Unix,Wingdows,CE,Symbian等,Sip agreement based on VoIP, video conferencing source of support to better penetrate the firewall, cross-platform support for Linux/Unix, Wingdows, CE, Symbian, etc.

一款利用OPENH323开发的VOIP软件，利用了SIP和H323协议~并且使用了网络穿透技术！欢迎大家下载-It is a Video conferencing and VoIP application for M$Windows. It is H323 and SIP protocol compatibale , based on OpenH323 project

基于SIP的视频会议安全机制 视频会议系统的安全保密方法 视频会议中的加密算法-SIP-based video conferencing video conferencing system security mechanisms security method of video conferencing in the encryption algorithm