摘要
现在的IP电话系统大部分还是基于H.323协议族,而H.323沿袭了传统电信网的运行和管理模式,本身较复杂,在应用于IP电话时存在着不可避免的缺陷。会议初始化协议(SIP)是由IETF制订的用于在两个或多个用户之间建立、修改和终止多媒体会话的信令协议。文中主要介绍了基于SIP的IP电话系统协议栈结构、SIP协议的基本内容以及其在IP电话中的具体应用。最后在与H.323协议进行了比较之后,提出了一些现存的问题并且做出了相应的前景展望。
Nowadays, most of IP telephony is based on H. 323 protocol stack, which has shortcomings to some extent owing to it＇ s following the philosophy of traditional voice systems. The session initiation protocol, which is developed by IETF, has been defined as a signaling protocol for the establishment, maintenance and termination of multimedia session between two or more users. In this paper, the SIPbased architecture of IP telephony system is introduced together with the contants of SIP protocol and concrete application in IP telephony. After compared between the SIP and the H. 323, the existent problems and the prospect are also presented.
出处
《计算机技术与发展》
2006年第4期184-186,189,共4页
Computer Technology and Development
