sip对sip的体系结构进行了分析，对初学sip的有很大的帮助。

gnugk-2.2.2 c实现的GateKeeper 实现IP电话网守功能。-GNUgk- 2.2.2 c achieve GateKeeper IP telephone gatekeeper function.

自己团队开发基于MYSQL数据库的连H323的GK的实时扣除通话用户费用的工程-their team-based MYSQL database links H323 of the GK calls deducting the cost of the project users

视频捕捉压缩传输的例子，由一点问题-video capture compression and transmission of examples, from 1:00 problems

新手必看--VOIP培训资料之基础知识和技术演进篇-新手必看- VOIP training materials basis for the evolution of knowledge and technology articles

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.

openh323 通用库，用到pwlib -Universal library for openh323, using pwlib

RTP/RTCP中英文协议文档及封包格式、协议分析，无线视频包丢失重传机制讲解及实现过程-RTP/RTCP protocol in English and Chinese documents and packet formats, protocol analysis, wireless video packet loss and retransmission mechanism to explain the implementation process

Siproxd is a proxy/masquerading daemon for the SIP protocol. It allows SIP clients (like kphone, linphone) to work behind an IP masquerading firewall or router.

包括 IP电话，视频监控，视频会议，mp3解码-VC++ Develop

open sip souce code c 语言实现可以在linux 编译-open sip souce codec language can realize linux compile