sjphone 比skype便宜，到其指点网站上注册会有5次试用，很好用

应用背景这是利用一些数学运算对信号进行相位计算的算法。关键技术CORDIC算法给出正确的相位值，采用一些计算。 ；

基于sip的服务器程序，java编写，很不错的-Procedures based on the sip server, java prepared, very good

用C＋＋语言写的开源SIP协议栈源码 编译环境为vs.net 2003-C++ language to write open-source SIP protocol stack source compiler environment vs.net 2003

本程序自带反向回传语音代理服务，可以使两个不同局域网内的客户机通过国际互连网进行语音通讯，本程序使用点对点方式，不通过任何中介服务器速度快，语音延迟极小，声音清晰逼真，其效果和真实IP电话不相上下，程序界面简洁，操作简单，是在互连网上打IP电话的极好工具，唯一的要求是通话双方都要有电脑，并连入互连网。 本程序能实现以下连网操作功能： 1.通话双方是同一局域网内的用户 2.通话双方是不同局域网内的用户，并通过各自的网关连入互连网 3.通话双方一个直接连入互连网，另一个处在局域网中，并通过网关连入互连网 4.通话双方直接连入互连网 一般的语音聊天软件只能实现1，4两种连网功能，而本程序能完全支持所有这四种连网情况，因而能使所有用户享受到语音聊天所带来的好处.-reverse the procedure own voice back-agency service, can make two different LAN client through the Internet for voice communications, point-to-point use of this procedure, not through any intermediary server speed, voice minimal delay, loud realistic, and the real effect of IP phone lines, procedural interface simple, simple operation, the interconnection of the IP phone online playing an excellent instrument, the only requirement is to call both sides have to have a computer, and connect to the Internet. This program can achieve the following networking feature : 1. Both the caller is within the same LAN users. Both the caller is different us

POS前台C++程序,源代码齐全,对这方面感兴趣的朋友,可以-POS front C++ Procedures, the source code complete, interested friends, you can

需要的可以用到 ！专业性强！-needs can be used! Professional strong!

VOIP电话源程序-source VoIP telephone

SIP(rfc2543)详细讲解SIP协议-SIP (rfc2543) explain in detail the SIP protocol

如何成功的运用OPENH323 来开发商业的H.323 协议栈-how to successfully make use of OPENH323 to develop commercial H.323 protocol stack

最新的jrtplib版本,多媒体实时流传输协议（RTP/RTCP）C++ 了lib包平台要求(linux,unix,windows)用于网络音频视频传输 -Jrtplib the latest version of real-time streaming multimedia transport protocol (RTP/RTCP) C++ The lib package require platform (linux, unix, windows) for network audio video transmission