很好的h323库，开放源代码，有开发指南

SIP协议栈开发（minisip）

《ｖｃ视频会议开发技术与实例》第三章代码，H.263编码&解码　和H.264编码&解码-"vc video conferencing technology and the development of examples" of the third chapter code, H.263 coding

H323_CallingLineIdentificationPresentation.rar

Objective Systems Open H.323 for C (ooh323c) is a simple H.323 protocol stack developed in C. The ASN.1 PER messaging code was developed using the ASN1C compiler using a modified version of our core run-time libraries. Additional open source components as well as code developed in-house were added to produce a functioning stack.

国际上著名的开源项目Bayonne IVR,完全基于电信的语音交互式系统应用.内含源码.-internationally renowned open-source projects Bayonne IVR entirely interactive voice telecommunications systems applications. Intron source.

关于VOIP系统的详细介绍，有助于VOIP系统的设计-on VOIP detailed description of the system, contribute to the design of VOIP System

RTC下接收呼叫的例子（如果是VC用户，请新建一个APPLICATION 32空工程，然后，用ADD FILE的方法把所有的文件包含在工程中编译）-RTC receive calls example (If yes VC users, a new air APPLICATION 32 works, and then use the ADD FILE all the documents included in the project compiler)

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.

用vb编的一个拨号电话软件程序，希望对visual basic编程感兴趣和希望了解拨号电话软件程序原理的人有所帮助-Vb by telephone for a dial-up software programs, hoping to interest in visual basic programming and would like to know the principle of a dial-up phone software programs help people! !

SIP的开发包，非常好用-SIP development kits, very handy