晕，VoIP用来穿透NAT的一种方式，通过三个基本的NAT

不错的资料 需要的可以参考！-good information can refer to the need!

应用背景This section shows and describes a call flow for a successful call using the Cisco ATA and MGCP. Note :The term Cisco ATA refers to both the Cisco ATA 186 and the Cisco ATA 188, unless otherwise stated. 关键技术Figure C-1 on page C-2 illustrates a basic call flow between two Cisco ATAs through a VocalData Call Agent. Table C-1 on page C-3 describes the action the Cisco ATA takes for each step in the call flow illustration and includes the log created by each step.

一个基于Openh323的视频会议终端，基于VC开发环境，可以与netmeeting互联。-It is a video meeting terminal based on Openh323 protocol, which developed with VC and can communicate with netmeeting.

星号语音处理星号语音处理与业务无关，是一个统一的流程，处理对象有RTP和文件，不管外界的RTP或文件输入格式，输入星号后默认从星号输出转换为有符号线性格式（发送或写入文件），当从外部世界的slinear格式转换为RTP或文件格式时

H323_CallingLineIdentificationPresentation.rar

一个ip电话实例的实现，以vc为开发环境。-an example of the realization of telephone, vc for the development environment.

一个透明时钟程序-a transparent procedures Clock

JRTPLib库中需要用到的多线程的支持库Jthread。使用于window、linux、unix等多平台。用户可以非常方便使用该库构建自己的线程应用-JRTPLib need for the use of multi-threading support for Jthread. For use in window, Linux, Unix and other platforms. Users can easily use the building for its own threaded applications

radius AAA 源代码,基于radius协议的鉴权，认证组件，广泛用于电信行业和银行业。-radius AAA source code, based on the radius of the agreement authentication, authentication components widely used in the telecommunications industry and banking.

IETF RFC3261(SIP协议)的中文翻译版；觉得看英文比较慢的朋友可以先看看这个，有少量翻译错误请对照英文版校对-IETF RFC3261 (SIP) version of the Chinese translation; Think of English slower you can take a look at this, a small amount of translation errors in the English version control Please proofread