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href="http://m.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="qask2ld" class="twoCol"><div id="ueby22q" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應</a>?<a href="http://m.cdcfah.com/cp/second-_txcp/">通信產(chǎn)品</a>?<a href="http://m.cdcfah.com/cp/third-txcp_jrsbtn/">接入設(shè)備</a>?新疆光傳輸設(shè)備價格烽火千兆以太網(wǎng)出線卡深圳市騰云科創(chuàng)供應「深圳市騰云科創(chuàng)供應」</p><div id="v2dax4x" class="leftbox clearfix"><h1>新疆光傳輸設(shè)備價格烽火千兆以太網(wǎng)出線卡深圳市騰云科創(chuàng)供應「深圳市騰云科創(chuàng)供應」</h1><div id="cxewydu" class="proBig"><div id="purebah" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244847651777344/7289118.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="xcjg29j" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244847651777344/7289118.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="86merob" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>新疆光傳輸設(shè)備價格烽火千兆以太網(wǎng)出線卡</p><p><span>***更新：</span>2020-06-24 03:19:52</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="aaxprog" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">深圳市騰云科創(chuàng)信息咨詢有限公司</a></p><p><span>聯(lián)系人：</span>夏永 </p><p><span>郵箱: </span>87993378@qq.com</p><p><span>電話: </span>16625147809</p><p><span>傳真: </span>1550_</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>1550-2042477</p><p><span>地址: </span>沙井街道蠔四社區(qū)街尾塘一巷5號幸福家園A棟、B棟、C棟、D棟D棟110D</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="te3ku2a" class="page-proshow02"><p class="title">詳細說明</p><div id="lask7ub" class="box"><p><p><p> 基本的網(wǎng)絡拓撲結(jié)構(gòu) </p> <p> SDH網(wǎng)是由SDH網(wǎng)元設(shè)備通過光纜互連而成的，網(wǎng)絡節(jié)點設(shè)備（網(wǎng)元）和傳輸線路的幾何排列就構(gòu)成了網(wǎng)絡的拓撲結(jié)構(gòu)。網(wǎng)絡的有效性、可靠性和經(jīng)濟性在很大程度上與其拓撲結(jié)構(gòu)有關(guān)。 </p> <p> 網(wǎng)絡拓撲的基本結(jié)構(gòu)有鏈形、星形、樹形、環(huán)形和網(wǎng)孔形。 </p> <p> 鏈形網(wǎng) </p> <p> 鏈形網(wǎng)絡拓撲是將網(wǎng)中的所有節(jié)點一一串聯(lián)，而首尾兩端開放。這種拓撲的特點是較經(jīng)濟，在SDH網(wǎng)的早期用得較多，主要用于專網(wǎng)如鐵路網(wǎng)中。 </p> <p> 星形網(wǎng) </p> <p> 星形網(wǎng)絡拓撲是將網(wǎng)中一網(wǎng)元做為中心節(jié)點設(shè)備與其他各網(wǎng)元節(jié)點相連，其他各網(wǎng)元節(jié)點之間互不相連，網(wǎng)元節(jié)點的業(yè)務都要經(jīng)過這個特殊節(jié)點轉(zhuǎn)接。 </p> <p> <br /> </p> <p> <br /> </p></p><p><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg" /></p><p><p> SDH的復用包括兩種情況： </p> <p> 1、由STM-1信號復用成STM-N信號 </p> <p> 復用的方法主要通過字節(jié)間插的同步復用方式來完成的，復用的基數(shù)是4，即4×STM-1→STM-4，4×STM-4→STM-16。在復用過程中保持幀頻不變（8000幀/秒），這就意味著高一級的STM-N信號是低一級的STM-n信號速率的4倍。 </p> <p> 在進行字節(jié)間插復用過程中，各幀的信息凈負荷和指針字節(jié)按原值進行字節(jié)間插復用，而STM-N的段開銷并不是由所有低階STM-N幀中的段開銷間插復用而成，而是舍棄了某些低階幀中的段開銷。 </p> <p> 2、由PDH支路信號復用成STM-N信號 </p> <p> 各種PDH支路信號復用進STM-N幀的過程都要經(jīng)歷映射、定位、復用三個步驟。映射相當于信號打包，定位伴隨與指針調(diào)整，復用相當于字節(jié)間插復用。ITU-T規(guī)定了一整套完整的映射復用結(jié)構(gòu)，也就是映射復用路線，通過這些路線可將PDH的3個系列的數(shù)字信號以多種方法復用成STM-N信號。 </p> <p> 復用結(jié)構(gòu)包括了一些基本的復用單元：C－容器、VC－虛容器、TU－支路單元、TUG－支路單元組、AU－管理單元、AUG－管理單元組，這些復用單元的下標表示與此復用單元相應的信號級別。 </p> <p> 從一個有效負荷到STM-N的復用路線不是***的，有多條路線（也就是說有多種復用方法），8Mbit/s的PDH支路信號是無法復用成STM-N信號的。 </p> <p> <br /> </p></p><p><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg" /></p><p>深圳騰云科創(chuàng)信息咨詢有限公司，成立于2015年專業(yè)從事通信產(chǎn)品購銷以及施工，維護，產(chǎn)品維修，計算機系統(tǒng)集成施工。公司擁有專業(yè)的技術(shù)團隊，由廠家(中興通訊，華為技術(shù)，烽火通信)服務10年以上從業(yè)經(jīng)驗的技術(shù)****，并有多名專業(yè)技術(shù)人員為您提供專業(yè)的商務技術(shù)和專業(yè)解決方案。公司主營中興通訊及華為技術(shù)各系列產(chǎn)品板件及整套設(shè)備的銷售與安裝，設(shè)備維護及板件返修，以及各設(shè)備可配置的單板，用戶電纜，中繼電纜等。公司業(yè)務涉及交通、金融、教育、衛(wèi)生、科研等系統(tǒng)已經(jīng)建立了牢固的業(yè)務合作伙伴關(guān)系。積極面向市場為廣大行業(yè)用戶提供設(shè)計、安裝、調(diào)試、培訓、維護的“一條龍"服務。本公司以質(zhì)量的服務、良好的信譽、雄厚的技術(shù)力量為廣大客戶提供質(zhì)量服務。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="新疆光傳輸設(shè)備價格烽火千兆以太網(wǎng)出線卡" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847651777344/7289118.jpg"></div></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/369245.html</p></div></div></div></div></div><div id="34khzgi" class="page-right twoColRt"><div id="puhjq2h" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="t32ifcz" class="recomPic likePro"><a 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