摘要
主要研究了如何通过现有的IP网络传输语音信号的问题,深入介绍了VOIP系统的基本原理、基本架构(包括媒体网关器、媒体网关控制器和语音服务器、信号网关器等)以及H.323、MEGACO、SIP和MGCP等协议,进一步探讨了基于SIP协议的VOIP系统的基本模型,研究了SIP的分层结构、功能实体、消息语法、基本工作流程以及注册和代理服务器行为,通过服务器初步实现了域内用户的注册及通信交互。
This paper mainly studies the problem of how to transfer the voice signal through existing IP network,makes in-depth introduction to the basic principles,basic framework（including the media gateway,media gateway controller and voice servers,and signaling gateways,etc.）of VOIP as well as H.323,MEGACO,SIP,MGCP and other protocols,further probes into the basic model of SIP-based VOIP system,and studies the layered structure,function entity,message grammar,basic workflow of SIP and the acts of register server and proxy server,initially realizing the registration and communicational interaction of domain users through the servers.
出处
《科技情报开发与经济》
2012年第23期86-89,共4页
Sci-Tech Information Development & Economy
