【正文】 畢 業(yè) 論 文題目：VoIP 的若干問題探討(VoIP on a number of issues ) 摘要由于價格低廉和對網(wǎng)絡的高效利用等優(yōu)點，VoIP 已經成為當前通信行業(yè)中發(fā)展最快的應用服務之一。其中， 作為 VoIP 的一個重要協(xié)議，是技術最成熟的 VoIP 協(xié)議之一，也是 VoIP 領域一種應用最廣泛的協(xié)議。本文論述了 VoIP 的基本原理以及使用的相關協(xié)議等關鍵技術，分析了VoIP 發(fā)展中存在的問題。設計了基于 SQL Server2022 及 的 VoIP 通信系統(tǒng)方案，并對程序流程進行了分析和研究，本設計可通過進一步的具體實現(xiàn)應用到實際 VoIP通信領域。關鍵詞 語音 IP，終端，交互式語音應答ABSTRACTRecently , VoIP has bee one of the application services that develops at the fastest speed in telemunication industry for its low price and high efficiency of using Inter and so on . As the most important protocol and one of the most mature technological protocols of VoIP , has been one of the most mon applied protocols of VoIP.According to the test, the system’s parameters , such as speech and delay have reached the requirement of protocol standard . With good expansibility and stability , the software has a nice operation interface . This system can be used to study VoIP munication protocol and some key techniques , such as speech code , mute restraint , realtime transmission , work security , work administration , and so on . Besides , it can be used to explore methods for realizing mercial VoIP .Key Words: VoIP , ,terminal ,IVR 目錄第一章 引 言 ...................................................................................................1 VOIP 的產生背景及特點 .................................................................................3 VOIP 的基本原理 ...............................................................................................5 VOIP 發(fā)展現(xiàn)狀 ...............................................................................................6第二章 VOIP 通信系統(tǒng)設計 ............................................................................10 系統(tǒng)需求分析 .................................................................................................10 VOIP 通信系統(tǒng)網(wǎng)絡傳輸模型的選擇 ..........................................................10 編程語言和開發(fā)工其的選擇 .................................................................11 數(shù)據(jù)庫的選擇 ...............................................................................................12 系統(tǒng)的結構和組成部分 ..............................................................14 VoIP 網(wǎng)絡通信技術 .................................................................................16 系統(tǒng)原理框圖 ...............................................................................................18第三章 方案設計 ...............................................................................................20 由 ATM 技術形成數(shù)據(jù)載荷分組的方式 ......................................................20 RTP 連接中攜帶載荷類型 ............................................................................20 IP/UDP/RTP 數(shù)據(jù)包頭的壓縮 ......................................................................21 路徑方案 ........................................................................................................22 協(xié)議的應用 ............................................................................................22 路由器的處理通道 ........................................................................................22 路由器中 TCP 包處理 ...................................................................................23． 1 優(yōu)先級處理器 .....................................................................................23． 2 發(fā)送處理器 .........................................................................................23 數(shù)據(jù)包的丟棄原則 .........................................................................................29第四章