UDP穿透程序，对于搞音视频会议类软件的网友可以参考参考学习...

VOIP program in VC++, video, voice and other features

DirectShow的实时视频传输实现方法

AppWizard has created this NetPhone application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application.-AppWizard has created this NetPhone application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application.

视频音频处理演示文件，其中视频编解码包括XVID，H263P和H264，音频采用ILBC，音频做了AEC处理。-demonstration video audio processing documents, which include video codec XVID, H263P and H264, used ILBC audio, audio processing done by the AEC.

Vovida出品的包括RTP、RTCP、SIP等各种基础协议栈和SIP UAC、UAS等功能的IP电话服务器端程序。编译环境为linux-Vovida produced in RTP, RTCP, and other SIP based protocol stack and SIP UAC and UAS capabilities of IP telephony server procedures. Linux compiler environment

用C＋＋语言写的开源SIP协议栈源码 编译环境为vs.net 2003-C++ language to write open-source SIP protocol stack source compiler environment vs.net 2003

ITU-T编写的h.263协议文档，相当权威！对做视频编码解码有帮助！-ITU-T H.263 agreement prepared by the document, rather authoritative! Done right video codec help!

使用eXosip开发的例子，使用vc打开工程直接编译库和例子，注意需要安装了xp平台开发包-use eXosip development example, the use of open vc works directly translated libraries and examples, the need to install the Platform Development Kit xp

sip对sip的体系结构进行了分析，对初学sip的有很大的帮助。-sip to sip architecture analysis for beginner sip of great help.

modem for voip