这是与一本书－《SIP协议及其应用》配套的电子教案。

This program was designed as a GUI client for the Asterisk PBX with Digium Zaptel cards and SIP VOIP hard or softphones as extensions, it could be adapted to other functions, but It was designed for Zap/SIP users. The program will run on X and Win32. -This program was designed as a GUI client for the Asterisk PBX with Digium Zaptel cards and SIP VOIP hard or softphones as extensions, it could be adapted to other functions, but It was designed for Zap/SIP users. The program will run on X and Win32.

H.323协议原理 ------VOIP网络基本构成单元-H.323 networks------ VOIP principle agreement constitutes the basic unit

VOIP行业的H323协议终端软电话的源代码，对VOIP行业的开发、技术维护人员有较大帮助。-H323 VOIP industry agreement soft phone terminal source code for the development of the VoIP industry, technical maintenance staff have more help.

音视频聊天演示程序。聊天双方一个作为服务器，一个作为客户机。客户 机呼叫服务器建立连接之后，即可进行音视频聊天――双方都可以看到对方的图像， 可以听到对方的声音。 要求的系统配置：USB摄像头或数码摄像机，声卡，麦克风等。-Audio and video chat demo. Both sides as a chat server as a client. Client calls the server after establishing a connection, you can conduct audio and video chat- both sides can see each other

基于G729语音压缩技术的源码，适当修改就可以加到自己的代码里面，很实用-G729 voice compression technology, based on the DLL source code, with appropriate modifications can be added to your code inside, very practical

需要的可以看看 是学习的好资料！-can look at the need to learn the good information!

白板，通过SocketAPＩ实现网络画图．-whiteboard, Socket API network drawing.

介绍基于pc2pc的IP电话编程- The introduction programs based on the pc2pc IP telephone

一个简单的关于网络录音机的源代码程序，用visual c++编写-A simple tape recorder on the network the source code of procedure, using visual c++ Prepared

AWAG经过ISDN拨叫一个号码并且传送一个消息。它还可以拨叫另外一个号码如果第一个号码不通或者没有人接听电话。-AWAG ISDN dial a number and send a message. It can also dial another number if a number of unreasonable or nobody answered the phone.