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src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105136719/8556415.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vo3kmbq" 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>青海全新光傳輸設備烽火STM-1,烽火</p><p><span>***更新：</span>2020-09-04 22:13:25</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="ilskrvw" 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="bpmtvhe" class="page-proshow02"><p class="title">詳細說明</p><div id="9fc2hy7" class="box"><p><p> 基本的網(wǎng)絡拓撲結(jié)構(gòu) </p> <p> SDH網(wǎng)是由SDH網(wǎng)元設備通過光纜互連而成的，網(wǎng)絡節(jié)點設備（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，青海全新光傳輸設備烽火STM-1、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，青海全新光傳輸設備烽火STM-1、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，青海全新光傳輸設備烽火STM-1。 </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 /> 網(wǎng)絡節(jié)點設備（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)。青海全新光傳輸設備烽火STM-1</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海全新光傳輸設備烽火STM-1,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105136719/8556415.jpg"></div><p> <p> 近些年，點播電視、多媒體業(yè)務和其他寬帶業(yè)務如雨后春筍般紛紛出現(xiàn)，為SDH應用在接入網(wǎng)中提供了廣闊的空間。SDH技術(shù)應用于接入網(wǎng)的好處是：1）對于要求高可靠、高質(zhì)量業(yè)務的大型企事業(yè)用戶，SDH可以提供較為理想的網(wǎng)絡性能和業(yè)務可靠性。2）可以將網(wǎng)管范圍擴展至用戶端，簡化維護工作。3）利用SDH固有靈活性，可使網(wǎng)絡運營者更快、更有效地提供用戶所需的長期和短期業(yè)務需求。 </p> <p> 從技術(shù)上來看，接入層的相對帶寬需求較小，需要提供IP、TDM，可能還有ATM等綜合業(yè)務傳送。以SDH 系統(tǒng)為基礎并能夠提供IP 、ATM 傳送與處理的系統(tǒng)（包括TDM、IP與ATM接口，甚至包括IP 和ATM 交換模塊）將是解決接入層傳送的主要方法，這種方式可廉價地在一個業(yè)務提供點（POP）上提供高質(zhì)量專線、ATM 、IP 等業(yè)務的接入、傳送和保護。 </p> </p> <p> <br /> </p> <p> <br /> 西藏SDH光端機烽火CONT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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海全新光傳輸設備烽火STM-1,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/9165528.jpg"></div>隨著信息社會的到來，人們希望現(xiàn)代信息傳輸網(wǎng)絡能快速、經(jīng)濟、有效地提供各種電路和業(yè)務，而上述網(wǎng)絡技術(shù)由于其業(yè)務的單調(diào)性，擴展的復雜性，帶寬的局限性，*在原有框架內(nèi)修改或完善已無濟于事，此時SDH的產(chǎn)生并憑借其眾多特性，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。 <p> 深圳市騰云科創(chuàng)信息咨詢有限公司是一家專業(yè)從事中興傳輸設備、華為SDH光傳輸設備、PCM接入設備、以及設備所配置的業(yè)務板卡等通信產(chǎn)品銷售及通信智能化項目施工的公司。我們秉承“客戶至上，誠信務實”的服務理念，用心、創(chuàng)新、高效，以質(zhì)量的專業(yè)技術(shù)為客戶提供比較好的需求服務。我司供應光傳輸設備，SDH光端機，中興ZXMP系列產(chǎn)品：ZXMP </p> <p> S200｜ZXMP S320｜ZXMP S330｜ZXMP S325｜ZXMP S385｜ZXMP S390整機及各型號單板。供應華為Metro系列產(chǎn)品：Metro1000｜Metro2050｜Metro3000｜Optix2500+｜Metro5000整機及各型號單板。供應華為OSN系列產(chǎn)品：OSN1500B｜OSN2000｜OSN2500｜OSN3500｜OSN7500整機及各型號單板。供應烽火IBAS系列產(chǎn)品： </p> <p> IBAS780A｜IBAS780B供應PCM綜合接入設備：FA16接入設備｜BX10接入設備，您的滿意，是我們一直的追求！ </p><p> STM-N信號幀結(jié)構(gòu)的安排應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N個STM-1信號通過字節(jié)間插復用成STM-N信號時，**是將STM-1信號的列按字節(jié)間插復用，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）地進行的，那么這個塊狀幀是怎樣在線路上進行傳輸?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 /> 它的作用是將支路端口的低速信號復用到線路端口的高速信號STM-N中。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海全新光傳輸設備烽火STM-1,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105000000/3722756.jpg"></div><p style="text-indent:25px">SDH網(wǎng)絡是整個數(shù)字網(wǎng)的一部分，它的定時基準應是這個數(shù)字網(wǎng)的統(tǒng)一的定時基準。時鐘同步，就是使通信網(wǎng)內(nèi)所有節(jié)點的時鐘頻率和相位都控制在預先確定的容差范圍內(nèi)，確保網(wǎng)內(nèi)各傳輸或交換節(jié)點的全部數(shù)字流正確有效地傳輸或交換，時鐘不同步，會在緩沖器中產(chǎn)生信息比特的溢出或取空，導致數(shù)字流的滑動損傷，造成數(shù)據(jù)出錯，影響正常運行。電流差動保護的關(guān)鍵是線路兩側(cè)保護之間的電流數(shù)據(jù)交換，當復接數(shù)字通信設備時，同步時鐘的提取方式是一個非常重要的問題。本期新增節(jié)點均從線路側(cè)提取同步信號。段，相當于一條大的傳輸通道。青海全新光傳輸設備烽火STM-1</p><p style="text-indent:25px">同時也使網(wǎng)絡運行靈活、安全、可靠，使網(wǎng)絡的功能非常齊全和多樣化；青海全新光傳輸設備烽火STM-1</p><p> SDH網(wǎng)絡的常見網(wǎng)元和功能 </p> <p> ADM——分/插復用器 </p> <p> 分/插復用器用于SDH傳輸網(wǎng)絡的轉(zhuǎn)接站點處，例如鏈的中間結(jié)點或環(huán)上結(jié)點，是SDH網(wǎng)上使用**多、**重要的一種網(wǎng)元，它是一個三端口的器件。 </p> <p> ADM有兩個線路端口和一個支路端口。兩個線路端口各接一側(cè)的光纜（每側(cè)收/發(fā)共兩根光纖），為了描述方便我們將其分為西（W）向、東向（E）兩個線路端口。ADM的作用是將低速支路信號交叉復用進東或西向線路上去，或從東或西側(cè)線路端口收的線路信號中拆分出低速支路信號。另外，還可將東/西向線路側(cè)的STM-N信號進行交叉連接，例如將東向STM-16中的3#STM-1與西向STM-16中的15#STM-1相連接。 </p> <p> ADM是SDH**重要的一種網(wǎng)元，通過它可等效成其它網(wǎng)元，即能完成其它網(wǎng)元的功能，例如：一個ADM可等效成兩個TM。青海全新光傳輸設備烽火STM-1</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司是一家電力設備、電子元器件、電子產(chǎn)品、建筑材料、通信設備(中興通訊及華為技術(shù)各系列產(chǎn)品板件及整套設備的銷售與安裝，設備維護及板件返修，以及各設備可配置的單板，用戶電纜，中繼電纜等)、辦公設備、五金交電、化工原料（不含危險及監(jiān)控化學品）的銷售；經(jīng)濟信息咨詢；經(jīng)營進出口業(yè)務。的公司，致力于發(fā)展為創(chuàng)新務實、誠實可信的企業(yè)。公司自創(chuàng)立以來，投身于SDH光傳輸設備，光端機，PCM接入設備，PTN OTN光傳輸設備，是通信產(chǎn)品的主力軍。騰云科創(chuàng)繼續(xù)堅定不移地走高質(zhì)量發(fā)展道路，既要實現(xiàn)基本面穩(wěn)定增長，又要聚焦關(guān)鍵領(lǐng)域，實現(xiàn)轉(zhuǎn)型再突破。騰云科創(chuàng)創(chuàng)始人卓龍飛，始終關(guān)注客戶，創(chuàng)新科技，竭誠為客戶提供良好的服務。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1158976.html</p></div></div></div></div></div><div id="vbdkme8" class="page-right twoColRt"><div id="4q73okb" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="1gkb8xz" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img 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