这是一个ip电话，可以帮助大家了解和学习ip软电话的做法啊

Low Rate 语音压缩 -Low Rate voice compression algorithm

网络IP电话 v1.4 修改版源码及所用控件-Network IP Telephone v1.4 modified version of source code and used in control

支持h323的视频电话服务端-support h323 video-phone service

权威的skype协议分析，详细分析skype的网络结构、防火墙穿越方法、编解码等实现细节。-authority of the agreement, skype detailed analysis of the network structure, through the firewall, such as codecs achieve details.

基于RTP的MPEG_4视频传输研,我的研究生毕业论文，供大家参考-RTP-based video transmission MPEG_4 the inquiry, my graduate thesis, for your reference

语音聊天系统 采用VB 开发 包含客户端和服务器端-Voice chat system uses the VB development includes client and server

SIP协议中穿越对称型/非对称型NAT防火墙的多种实现方法，解决私网内部的防火墙穿透问题。-SIP cross symmetric/asymmetric NAT firewall multiple solutions, private internal network firewall penetration.

本文档可以告诉您　如何在libosip的基础上开发即时消息-this document can tell you how libosip development on the basis of instant messaging

网络视音频系统主要功能就在于视音频的采集，网络传输两个方面，通过Video Capture系列API函数，你就可以轻松的搞定视频捕捉，但是对于视频的网络传输，则要费一番功夫了。-Network as the main functions of audio systems is that video and audio collection, two aspects of network transmission, through the Video Capture Series API function, you can easily get video capture, but for network video transmission, will cost some effort has been.

视频压缩编解码ITU h.263源代码.经典的视频会议和远程监控算法.- The video frequency compression arranges decodes ITU the h.263 source code Classical video frequency conference and long-distance monitoring algorithm