【正文】 ...........................................................45第五章 七號(hào)信令網(wǎng) .............................................................................................................................45第一節(jié) 7 號(hào)信令系統(tǒng) .......................................................................................................................45 信令的基本概念 ...................................................................................................................45 信令的分類 ...........................................................................................................................46 信令系統(tǒng)概述 ..............................................................................................................47第二節(jié) 信令網(wǎng)的分類與結(jié)構(gòu) ..........................................................................................................48. 信令網(wǎng)概念 ..............................................................................................................48. 信令系統(tǒng)的工作方式 ..............................................................................................49. 信令網(wǎng)的組成和分類 ..........................................................................................................50. 我國(guó)信令網(wǎng)的結(jié)構(gòu)和網(wǎng)絡(luò)組織 ........................................................................................51第三節(jié) 信令網(wǎng)的信令點(diǎn)編號(hào)和信令路由的分類 ..........................................................................52. 信令網(wǎng)的信令點(diǎn)編碼 ..........................................................................................................52. 信令路由的分類 ..................................................................................................................53第四節(jié) 信令結(jié)構(gòu)及信令單元 ................................................................................................55. 信令系統(tǒng)的結(jié)構(gòu) ......................................................................................................56. 信令單元分類 ....................................................................................................................59 信令單元格式 ........................................................................................................................61 消息信令單元內(nèi)部格式 ........................................................................................................62 消息組名和消息名 ................................................................................................................67第五節(jié) 信令的基本流程 ........................................................................................................71 一次成功的呼叫過(guò)程 ............................................................................................................71 ISUP 基本呼叫過(guò)程 ...........................................................................................................72第六章 數(shù)字同步網(wǎng) .............................................................................................................................724 / 150第一節(jié) 數(shù)字同步網(wǎng)的同步方式 ......................................................................................................73. 網(wǎng)同步的必要性 ..................................................................................................................73. 數(shù)字同步網(wǎng)的同步方式 ......................................................................................................73第二節(jié) 數(shù)字同步網(wǎng)的性能指針及同步網(wǎng)的監(jiān)控 ............................................................................74 ........................................................................................................74 同步網(wǎng)的監(jiān)控管理網(wǎng)絡(luò) .......................................................................................................75 同步網(wǎng)的安全管理措施 .......................................................................................................75第三節(jié) 我國(guó)數(shù)字同步網(wǎng)簡(jiǎn)介 ............................................................................................................76 我國(guó)數(shù)字同步網(wǎng)采用的同步方式 .......................................................................................76第七章 軟交換網(wǎng)絡(luò) .............................................................................................................................77第一節(jié) 固網(wǎng)智能化 ........................................................................................................................77 固網(wǎng)智能化簡(jiǎn)介 ............................................................................................................77 固網(wǎng)智能化技術(shù)方案比較 ............................................................................................79第二節(jié) 軟交換技術(shù)簡(jiǎn)介 ................................................................................................................81 網(wǎng)絡(luò)總體結(jié)構(gòu) ................................................................................................................81 軟交換網(wǎng)絡(luò)總體結(jié)構(gòu) ....................................................................................................81第三節(jié) 軟交換網(wǎng)絡(luò)主要協(xié)議 ........................................................................................................82 ...................................................................................................................................83 SIP/SIPT 協(xié)議 ..................................................................................................................84 Sigtran 協(xié)議 .......................................................................................................................88 MGCP 協(xié)議 .......................................................................................................................89 ＳＣＴＰ ............................................................................................................................91第四節(jié) 呼叫流程示例 ....................................................................................................................92 模擬電話 ——模擬電話 .................................................................................................92 PSTN——PSTN.......................................................................................................