nettalk,个人觉得非常不错的网络电话，集成视频，声音和文本聊天。提供源码，大家共同学习...

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

IETF RFC3261(SIP协议)的中文翻译版；觉得看英文比较慢的朋友可以先看看这个，有少量翻译错误请对照英文版校对-IETF RFC3261 (SIP) version of the Chinese translation; Think of English slower you can take a look at this, a small amount of translation errors in the English version control Please proofread

非常著名的视频压缩标准:H.263,全部的源码，非常适合视频编码的学习-CODEC H.263

一个用java实现的局域网语音聊天系统，包括服务器端和客户端，可以实现文字聊天，语音聊天，文件传输等功能，并实现了密码验证。-used to achieve a LAN voice chat system, including the server and client, can achieve a text chat, voice chat, file transfer and other functions, and to achieve a password verification.

ip电话软件speakfs 7.2版本，GSM, ADPCM, LPC, and LPC-10压缩和多种加密算法-ip phone software speakfs 7.2 version, GSM, ADPCM, LPC, and LPC-10 compression and a variety of encryption algorithm

8路实时视频会议系统,低成本高效率135493824-8-way real-time video conferencing systems, low-cost, high efficiency 135493824

MPEG4流媒体的视频传输和运程播放代码，VC平台-streaming MPEG4 video transmission and broadcast code leg, VC platform

modem for voip

可视电话的MCU实现方案， 该方案基于IP 符合H。323标准-Videophone the MCU program, which based on IP H meet. Standard 323

* How to use the programming framework and classes available in Windows Mobile and Smartphone SDK * The fundamentals of .NET Compact Framework 2.0 * Techniques for developing your own robust Smartphone applications * Steps for customizing components and P/Invoke * How to enhance data and communication security * Ways to improve the performance of your applications * Fundamental techniques for supporting world-ready applications - * How to use the programming framework and classes available in Windows Mobile and Smartphone SDK * The fundamentals of .NET Compact Framework 2.0 * Techniques for developing your own robust Smartphone applications * Steps for customizing components and P/Invoke * How to enhance data and communication security * Ways to improve the performance of your applications * Fundamental techniques for supporting world-ready applications