【正文】 ............................................................... 30 網(wǎng)絡(luò)安全方案設(shè)計(jì) ........................................................................................ 31 系統(tǒng)功能 ................................................................................................................ 32 第 5 章 無線網(wǎng)絡(luò)覆蓋系統(tǒng) ................................................................................................ 34 系統(tǒng)概述 ................................................................................................................ 34 需求分析 ................................................................................................................ 34 總體設(shè)計(jì) ................................................................................................................ 34 系統(tǒng)設(shè)計(jì)說明 ........................................................................................................ 34 無線組網(wǎng) ........................................................................................................ 35 無線安全 ........................................................................................................ 35 天線選擇和布放 ............................................................................................ 36 頻率規(guī)劃與負(fù)載均衡 .................................................................................... 36 網(wǎng)絡(luò)管理 ........................................................................................................ 37 衰減理論 計(jì)算公式 ........................................................................................ 38 系統(tǒng)功能 ................................................................................................................ 38 第 6 章 程控電話交換機(jī)系統(tǒng) ............................................................................................ 40 系統(tǒng)概述 ................................................................................................................ 40 需求分析 ................................................................................................................ 40 總體設(shè)計(jì) ................................................................................................................ 40 系統(tǒng)設(shè)計(jì)說明 ........................................................................................................ 41 系統(tǒng)拓?fù)鋱D .................................................................................................... 41 產(chǎn)品選型說明 ................................................................................................ 41 系統(tǒng)配置表 .................................................................................................... 41 系統(tǒng)功能 ................................................................................................................ 41 基本功能 ........................................................................................................ 41 增值功能 ........................................................................................................ 42 第 7 章 有線電視系統(tǒng) ........................................................................................................ 44 系統(tǒng)概述 ................................................................................................................ 44 3 需求分析 ................................................................................................................ 44 總體設(shè)計(jì) ................................................................................................................ 45 系統(tǒng)拓?fù)鋱D .................................................................................................... 45 有線電視系統(tǒng) ................................................................................................ 45 系統(tǒng)設(shè)計(jì)說明 ........................................................................................................ 45 系統(tǒng)布點(diǎn)原則 ................................................................................................ 45 干線傳輸網(wǎng)絡(luò) ................................................................................................ 46 放大器 ............................................................................................................ 46 分 配網(wǎng)絡(luò) ........................................................................................................ 49 網(wǎng)絡(luò)系統(tǒng)的計(jì)算 .................................................................................................... 49 系統(tǒng)功能 ................................................................................................................ 49 第 8 章 無線對(duì)講通訊系統(tǒng) ................................................................................................ 51 系統(tǒng)概述 ................................................................................................................ 51 需求分析 ................................................................................................................ 51 總體設(shè)計(jì) ................................................................................................................ 52 系統(tǒng)拓?fù)鋱D .................................................................................................... 52 系統(tǒng)設(shè)計(jì)說明 ........................................................................................................ 52 系統(tǒng)組成 ........................................................................................................ 52 天線布置 ........................................................................................................ 52 干線傳輸網(wǎng)絡(luò) ................................................................................................ 53 對(duì)信號(hào)質(zhì)量的要求 ........................................................................................ 53 覆蓋區(qū)域場(chǎng)強(qiáng)估算 ........................................................................................ 54 系統(tǒng)功能 ................................................................................................................ 56 第 9 章 時(shí)鐘系統(tǒng) .................