下载后可任意编辑目 录摘 要........................................................................................................IVABSTRACT................................................................................................................6第一章 绪 论........................................................................................71.1 选题的背景....................................................................................................71.2 基于SIP 协议用户代理软件的国内外讨论现状........................................91.3 论文内容和结构安排....................................................................................10第二章 SIP 协议及H.323 协议簇的简介................................................122.1 SIP系统的组成............................................................................................16图2 ．1 SIP 系统的组成............................................................................162.2 SIP功能概要................................................................................................172.2.1 用户定位............................................................................................182.2.2 会话能力的协商................................................................................182.2.3 呼叫参加者管理................................................................................182.2.4 呼叫建立............................................................................................192.2.5 呼叫处理............................................................................................192.2.6 SIP注册服务........................................................................................192.3 SIP的呼叫过程....................................................................................202.4 协议的优点....................................................................................................232.4.1 基本呼叫的建立和拆除........................
VIP
