供水有限公司统一通信系统建设方案目 录1概述...................................................................................................................................................................41.1电话通信系统....................................................................................................................................41.2视频会议系统....................................................................................................................................51.3OTN 综合传输系统............................................................................................................................61.4下属水司通信系统............................................................................................................................62项目必要性.......................................................................................................................................................63方案设计...........................................................................................................................................................83.1设计原则............................................................................................................................................83.2项目目标............................................................................................................................................84项目方案...........................................................................................................................................................94.1统一通信系统概念............................................................................................................................94.1.1服务器群....................................................................................................................................94.1.2网络及接入设备......................................................................................................
