华为 NGN与软交换概述 i 目 录 第1章 NGN简介 ............................................................................................................................ 1 1.1 传统PSTN网络 .......................................................................................................................1 1.2 NGN概念及应用 .....................................................................................................................2 1.2.1 NGN网络架构 ..............................................................................................................2 1.2.2 NGN网络特点 ..............................................................................................................3 1.2.3 NGN的目标..................................................................................................................5 第2章 NGN关键技术介绍 .............................................................................................................. 6 2.1 软交换技术 .............................................................................................................................6 2.1.1 什么是软交换？ ...........................................................................................................6 2.1.2 引入软交换的意义 .......................................................................................................8 2.1.3 软交换的参考模型 .......................................................................................................9 2.1.4 软交换的对外接口 .................................................................................................... 10 2.1.5 软交换硬件平台 ........................................................................................................ 11 2.2 媒体网关技术 ...................................................................................................................... 12 2.3 媒体网关控制技术 ................................
