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...

This program was designed as a GUI client for the Asterisk PBX with Digium Zaptel cards and SIP VOIP hard or softphones as extensions, it could be adapted to other functions, but It was designed for Zap/SIP users. The program will run on X and Win32. -This program was designed as a GUI client for the Asterisk PBX with Digium Zaptel cards and SIP VOIP hard or softphones as extensions, it could be adapted to other functions, but It was designed for Zap/SIP users. The program will run on X and Win32.

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

H.323， 基于VIS H.323 dll library的视频会议系统-H.323, based on the VIS H.323 dll library of video conferencing systems

IP电话编程-IP telephone programs

nettalk 一个很好的网络电话源代码 希望大家喜欢-nettalk a good Internet phone source code hope you like

跨平台（Linux，Windows）的开源SIP服务器端-Cross-platform (Linux, Windows) open-source SIP server-side

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.

MPEG-4编解码的实现。包括MPEG4视音频编解码。-MPEG-4 codecs realized. MPEG4 video and audio codec.

视频聊天源码服务端-video chat services-source

SIP RFC协议标准,只可惜是 英文版的，可做参考-SIP RFC protocol standards, but unfortunately are in English, can refer to