这是基于SIP的VoIP的源代码太。

IP电话程序--IP phone program

H.323简要说明-A brief description of H.323

OSIP最新代码-CBS.MW latest code

RealNetworks公司的Helix 的客户方部分源码．-RealNetworks Helix client part of the source code.

IP电视电话会议+VC源码，非常好的IP电话会议的学习代码-IP video and telephone conference on+ VC source, very good IP telephone conference learning code

Microsoft RTP Extensions specification.

vc编写的sip客户端，配合sip代理服务器一起使用，无需其他库文件，直接编译即可

学习SIP(Session Initiation Protocol)协议的最佳文档。-learning SIP (Session Initiation Protocol) the best documentation.

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.

自己动手写的sip协议栈，SIP（Session Initiation Protocal）称为会话初始化协议，是由IETF（Internet Engineering Task Force）组织于1999年提出的一个基于IP网络中实现实时通信应用的一种信令协议。-Do-It-Yourself wrote sip protocol stack, SIP (Session Initiation Protocal) known as the Session Initiation Protocol is the IETF (Internet Engineering Task Force) organization in 1999 as a network-based real-time IP communications applications a letter the agreement.