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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>西藏代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</p><p><span>***更新：</span>2020-08-01 01:00:53</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="38tt3oh" 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(dāng)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="cx3uq5c" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="gmc3nn0" class="box"><p><p><p> STM-N信號幀結(jié)構(gòu)的安排應(yīng)盡可能使支路低速信號在一幀內(nèi)均勻、有規(guī)律的分布，以便于從高速信號中直接上/下低速支路信號。因此，ITU-T規(guī)定了STM-N的幀是以字節(jié)為單位的矩形塊狀結(jié)構(gòu)。 </p> <p> STM-N的信號是9行×270×N列的幀結(jié)構(gòu)。此處的N與STM-N的N相一致，取值范圍：1，4，16，64……。表示此信號由N個STM-1 信號通過字節(jié)間插復(fù)用而成。由此可知，STM-1信號的幀結(jié)構(gòu)是9行×270列的塊狀幀。并且，當(dāng)N個STM-1信號通過字節(jié)間插復(fù)用成STM-N信號時，**是將STM-1信號的列按字節(jié)間插復(fù)用，行數(shù)恒定為9行不變。 </p> <p> 我們知道，信號在線路上串行傳輸時是逐個比特（bit）地進(jìn)行的，那么這個塊狀幀是怎樣在線路上進(jìn)行傳輸?shù)哪兀?STM-N信號的傳輸也遵循按比特的傳輸方式，SDH信號幀傳輸?shù)脑瓌t是：按幀結(jié)構(gòu)的順序從左到右，從上到下逐個字節(jié)，并且逐個比特地傳輸，傳完一行再傳下一行，傳完一幀再傳下一幀。 </p> <p> <br /> </p></p><p><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg" /></p><p><p> SDH的應(yīng)用 </p> <p> 由于以上所述的SDH的眾多特性，使其在廣域網(wǎng)領(lǐng)域和**網(wǎng)領(lǐng)域得到了巨大的發(fā)展。中國移動、電信、聯(lián)通、廣電等電信運營商都已經(jīng)大規(guī)模建設(shè)了基于SDH的骨干光傳輸網(wǎng)絡(luò)。利用大容量的SDH環(huán)路承載IP業(yè)務(wù)、ATM業(yè)務(wù)或直接以租用電路的方式出租給企、事業(yè)單位。而一些大型的**網(wǎng)絡(luò)也采用了SDH技術(shù)，架設(shè)系統(tǒng)內(nèi)部的SDH光環(huán)路，以承載各種業(yè)務(wù)。比如電力系統(tǒng)，就利用SDH環(huán)路承載內(nèi)部的數(shù)據(jù)、遠(yuǎn)控、視頻、語音等業(yè)務(wù)。 </p> <p> 而對于組網(wǎng)更加迫切、而又沒有可能架設(shè)**SDH環(huán)路的單位，很多都采用了租用電信運營商電路的方式。由于SDH基于物理層的特點，單位可在租用電路上承載各種業(yè)務(wù)而不受傳輸?shù)南拗?。承載方式有很多種，可以是利用基于TDM技術(shù)的綜合復(fù)用設(shè)備實現(xiàn)多業(yè)務(wù)的復(fù)用，也可以利用基于IP的設(shè)備實現(xiàn)多業(yè)務(wù)的分組交換。SDH技術(shù)可真正實現(xiàn)租用電路的帶寬保證，安全性方面也優(yōu)于VPN等方式。在****和對安全性非常注重的企業(yè)，SDH租用線路得到了***的應(yīng)用。一般來說，SDH可提供E1、E3、STM-1或STM-4等接口，完全可以滿足各種帶寬要求。同時在價格方面，也已經(jīng)為大部分單位所接受。 </p></p><p><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105000000/3722756.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(wù)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(wù)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(wù)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(wù)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(xùn)、維護的“一條龍"服務(wù)。本公司以質(zhì)量的服務(wù)、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(wù)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="西藏代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105205079/5635847.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/767935.html</p></div></div></div></div></div><div id="km8qf5v" class="page-right twoColRt"><div id="kfrk8ds" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div 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