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<meta http-equiv="Cache-Control" content="no-transform" /> <meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://m.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center 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id="cenuvbf" class="leftbox clearfix"><h1>寧夏SDH光傳輸設備烽火RET 深圳市騰云科創(chuàng)供應</h1><div id="qykbi7v" class="proBig"><div id="pxyfbsb" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/9165528.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ldu89nz" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/9165528.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="vepbrsj" 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)品關鍵詞：</span>寧夏SDH光傳輸設備烽火RET,烽火</p><p><span>***更新：</span>2021-01-31 05:07:49</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="z29co7y" 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="sgsjlxj" class="page-proshow02"><p class="title">詳細說明</p><div id="thy8kpw" class="box"><p><p> 網(wǎng)管系統(tǒng)的傳輸通道由D1，D12開銷字節(jié)提供，網(wǎng)絡單元之間采用DCC通道， </p> <p> DCC通道終端在被連接的每個設備上，在相同的管理區(qū)域內(nèi)，通過以太網(wǎng)連接。例如某地市目前*有l(wèi)套網(wǎng)管系統(tǒng)。利用現(xiàn)有的網(wǎng)管設備，將新增網(wǎng)元納入到現(xiàn)有網(wǎng)管系統(tǒng)中，統(tǒng)一進行管理。一套OTNM 2000其多可管理756個等效標準網(wǎng)元，現(xiàn)有的網(wǎng)管系統(tǒng)有足夠的能力管理包括本期新增的所有網(wǎng)元，寧夏SDH光傳輸設備烽火RET。網(wǎng)管管理能力是一套網(wǎng)管在保證規(guī)定性能指標的情況下所能管理的比較大等效網(wǎng)元數(shù)，寧夏SDH光傳輸設備烽火RET。 </p> <p> 深圳騰云科創(chuàng)信息咨詢有限公司主營中興ZXMP系列產(chǎn)品：ZXMP S200｜ZXMP S320｜ZXMP S330｜ZXMP S325｜ZXMP S385｜ZXMP S390整機及各型號單板。華為Metro系列產(chǎn)品：Metro1000｜Metro2050｜Metro3000｜Optix2500+｜Metro5000整機及各型號單板，寧夏SDH光傳輸設備烽火RET。華為OSN系列產(chǎn)品：OSN1500B｜OSN2000｜OSN2500｜OSN3500｜OSN7500整機及各型號單板。烽火IBAS系列產(chǎn)品： IBAS780A｜IBAS780B， PCM綜合接入設備介紹：FA16接入設備｜BX10接入設備終端復用器用在網(wǎng)絡的終端站點上。寧夏SDH光傳輸設備烽火RET</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧夏SDH光傳輸設備烽火RET,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/9165528.jpg"></div><p> 深圳市騰云科創(chuàng)信息咨詢有限公司 SDH的特點 </p> <p> （1）由于SDH多種網(wǎng)絡拓撲結(jié)構，它所組成的網(wǎng)絡非常靈活，它能增強網(wǎng)監(jiān)，運行管理和自動配置功能，優(yōu)化了網(wǎng)絡性能有，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； </p> <p> （2）SDH有傳輸和交換的性能它的系列設備的構成能通過功能塊的自由組合，實現(xiàn)了不同層次和各種拓撲結(jié)構的網(wǎng)絡，十分靈活； </p> <p> （3）SDH并不專屬于某種傳輸介質(zhì)，它可用于雙絞線、同軸電纜，但SDH用于傳輸高數(shù)據(jù)率則需用光纖。這一特點表明，SDH既適合用作干線通道，也可作支線通道。例如，我國的國家與省級有線電視干線網(wǎng)就是采用SDH，而且它也便于與光纖電纜混合網(wǎng)(HFC)相兼容。 </p> <p> （4）從OSI模型的觀點來看，SDH屬于其比較低層的物理層，并未對其高層有嚴格的限制，便于在SDH上采用各種網(wǎng)絡技術，支持ATM或IP傳輸； </p> <p> （5）SDH是嚴格同步的，從而保證了整個網(wǎng)絡穩(wěn)定可靠，誤碼少，且便于復用和調(diào)整； </p> <p> （6）標準的開放型光接口 </p> <p> 可以在基本光纜段上實現(xiàn)橫向兼容，降低了聯(lián)網(wǎng)成本。西藏光端機烽火NMU隨著網(wǎng)絡傳輸技術的不斷發(fā)展, 電力系統(tǒng)中基于寬帶數(shù)據(jù)網(wǎng)的應用也越來越多。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧夏SDH光傳輸設備烽火RET,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg"></div><p style="text-indent:25px"><span style="font-size:16px;font-family:"Microsoft YaHei";"> </span><span style="font-size:16px;font-family:"Microsoft YaHei";">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。</span></p><p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 電源系統(tǒng)SDH設備采用一48伏直流電源，工作電壓應滿足：輸入電壓范圍是-40V至-57V；電話衡量雜音電壓<2mV；峰峰值雜音電壓(0．300Hz)_<400mV。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 根據(jù)公式：電流=功率／電壓。各設備正常工作時的比較大電流等于滿配置功耗除以工作電壓。比較大電流再加上適當富余量取整可得所需熔絲大小。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 時鐘同步系統(tǒng)</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">SDH網(wǎng)元時鐘源的種類</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(1)外部時鐘源——由SETPI功能塊提供輸入接口；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(2)線路時鐘源一由SPI功能塊從STM．N線路信號中提??；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(3)支路時鐘源——由PPI功能塊從PDH支路信號中提取，不過該時鐘一般不用，因為SDH／PDH網(wǎng)邊界處的指針調(diào)整會影響時鐘質(zhì)量；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(4)設備內(nèi)置時鐘源由SETS功能塊提供。</span> </p> <p> <br /> </p> <p> <br /> 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> <span style="font-size:16px;font-family:"Microsoft YaHei";"></span><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧夏SDH光傳輸設備烽火RET,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div><p> SDH的產(chǎn)生背景 </p> <p> SDH技術的誕生有其必然性，隨著通信的發(fā)展，要求傳送的信息不*是話音，還有文字、數(shù)據(jù)、圖像，和視頻等。加之數(shù)字通信和計算機技術的發(fā)展，在70至80年代，陸續(xù)出現(xiàn)了T1(DS1)／E1載波系統(tǒng)(1.544／2.048Mbps)、X.25幀中繼、ISDN(綜合業(yè)務數(shù)字網(wǎng)) 和FDDI(光纖分布式數(shù)據(jù)接口)等多種網(wǎng)絡技術。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。SDH就是在這種背景下發(fā)展起來的。 SDH有傳輸和交換的性能，它的系列設備的構成能通過功能塊的自由組合。新疆全新光傳輸設備烽火STM-4</p><p style="text-indent:25px">信息凈負荷位于STM-N幀中第1到第9行。寧夏SDH光傳輸設備烽火RET</p><p style="text-indent:25px">通信產(chǎn)品是當今基礎的民生服務行業(yè)之一，并且隨著工信部2015年信息通信業(yè)“十三五”規(guī)劃的出臺，市場對于通信產(chǎn)品熱度有增無減。SDH光傳輸設備，光端機，PCM接入設備，PTN OTN光傳輸設備業(yè)是一個以技術為導向的行業(yè)，新型通信技術的開發(fā)及應用對行業(yè)的發(fā)展起著巨大的推動作用。隨著3G技術的逐漸成熟、4G技術的試點推廣與商用化和5逐步試點，通信運營商進行了相應的大規(guī)?；A設施完善。通信產(chǎn)品不*成就通訊業(yè)收入增長的最重要源原，還從某種程度上改變了人們的通信方式和生活習慣，造就了一批風光無限的新興貿(mào)易型企業(yè)。基礎電信運營商為應對市場競爭并提升未來的競爭力，對貿(mào)易加入將不斷增加，以支撐持續(xù)穩(wěn)定增長的業(yè)務需求。通信業(yè)市場需求和加入規(guī)模的增長，將為通信技術服務行業(yè)開拓廣闊的市場空間。寧夏SDH光傳輸設備烽火RET</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司致力于通信產(chǎn)品，是一家貿(mào)易型的公司。騰云科創(chuàng)致力于為客戶提供良好的SDH光傳輸設備，光端機，PCM接入設備，PTN OTN光傳輸設備，一切以用戶需求為中心，深受廣大客戶的歡迎。公司將不斷增強企業(yè)重點競爭力，努力學習行業(yè)知識，遵守行業(yè)規(guī)范，植根于通信產(chǎn)品行業(yè)的發(fā)展。騰云科創(chuàng)立足于全國市場，依托強大的研發(fā)實力，融合前沿的技術理念，飛快響應客戶的變化需求。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/3089372.html</p></div></div></div></div></div><div id="7az3mxj" class="page-right twoColRt"><div id="lugcevh" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="voa8m2w" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="vo8o3of" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" alt="寧波寧海直接考A2有幾個科目真誠推薦寧波助學商務信息咨詢供應" class="vcenter" 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