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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>?寧夏銷售光傳輸設(shè)備烽火STM-16 深圳市騰云科創(chuàng)供應(yīng)</p><div id="lk2qi3f" class="leftbox clearfix"><h1>寧夏銷售光傳輸設(shè)備烽火STM-16 深圳市騰云科創(chuàng)供應(yīng)</h1><div id="hgjr82b" class="proBig"><div id="gkc2phj" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3ld2wy2" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="imjimol" 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>寧夏銷售光傳輸設(shè)備烽火STM-16,烽火</p><p><span>***更新：</span>2020-09-10 05:09:38</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="fkxkhol" 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="vkh8f8a" class="page-proshow02"><p class="title">詳細說明</p><div id="pogdfhe" class="box"><p><p style="text-indent:25px">SDH出現(xiàn)以前，沿用的數(shù)字傳輸設(shè)備均屬準同步數(shù)字系（ Plesiochronous Digital Hierarchy，縮寫為PDH）。SDH技術(shù)的誕生有著其必然性。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(shù)的發(fā)展，在70至80年代，寧夏銷售光傳輸設(shè)備烽火STM-16，陸續(xù)出現(xiàn)了T1(DS1)／E1載波系統(tǒng)(1，寧夏銷售光傳輸設(shè)備烽火STM-16.544／2.048Mbps)、X.25幀中繼、ISDN(綜合業(yè)務(wù)數(shù)字網(wǎng)) 和FDDI(光纖分布式數(shù)據(jù)接口)等多種網(wǎng)絡(luò)技術(shù)。隨著信息社會的到來，人們希望現(xiàn)代信息傳輸網(wǎng)絡(luò)能快速、經(jīng)濟、有效地提供各種電路和業(yè)務(wù)，而上述網(wǎng)絡(luò)技術(shù)由于其業(yè)務(wù)的單調(diào)性，寧夏銷售光傳輸設(shè)備烽火STM-16，擴展的復(fù)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。管理單元指針位于STM-N幀中第4行的***到第9×N列。寧夏銷售光傳輸設(shè)備烽火STM-16</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧夏銷售光傳輸設(shè)備烽火STM-16,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg"></div><p> 免除了**困難的光纜輔設(shè)工程，比較適用于具有大規(guī)模用戶的企業(yè)。又如委托公眾網(wǎng)**為本企業(yè)或部門使用的虛擬**網(wǎng)，它所提供的功能和容量完全按照用戶的要求進行，這就免除了全部的投資風(fēng)險和維護工作，應(yīng)用機動靈活，使用部門可以專心致力于其本行業(yè)的業(yè)務(wù)工作。 </p> <p> 廣而言之，把企業(yè)非**的服務(wù)性職能交給社會的專業(yè)部門經(jīng)營，而集中力量從事自己的**業(yè)務(wù)，甚至**所謂的虛擬公司，這已經(jīng)成為上世紀90年代以來西方國家的企業(yè)為提高其競爭力而公認的世界性潮流?？傊?，依托穩(wěn)定的服務(wù)主體，有條件積極取得進入電信市場競爭的合法地位，或與公網(wǎng)聯(lián)合，間接進軍電信市場，是目前形勢下各大專網(wǎng)的主要選擇；這也是電信技術(shù)**的必然產(chǎn)物，更是我國由計劃經(jīng)濟向市場經(jīng)濟轉(zhuǎn)變的要求。 </p> <p> <br /> 寧夏銷售光傳輸設(shè)備烽火STM-16從OSI模型的觀點來看，SDH屬于其比較低層的物理層。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧夏銷售光傳輸設(shè)備烽火STM-16,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847651777344/7289118.jpg"></div><p> <br /> </p> <p> SDH的特點 </p> <p> （1）由于SDH有多種網(wǎng)絡(luò)拓撲結(jié)構(gòu)，它所組成的網(wǎng)絡(luò)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(luò)性能，同時也使網(wǎng)絡(luò)運行靈活、安全、可靠，使網(wǎng)絡(luò)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(shè)備的構(gòu)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(gòu)的網(wǎng)絡(luò)，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(luò)技術(shù)，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(luò)穩(wěn)定可靠，誤碼少，且便于復(fù)用和調(diào)整； </p> <p> （6）標準的開放型光接口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。 </p> <p> <br /> </p> <p> <br /> </p><p> SDH網(wǎng)絡(luò)的常見網(wǎng)元和功能 </p> <p> SDH傳輸網(wǎng)是由不同類型的網(wǎng)元通過光纜線路的連接組成的，通過不同的網(wǎng)元完成SDH網(wǎng)的傳送功能：上/下業(yè)務(wù)、交叉連接業(yè)務(wù)、網(wǎng)絡(luò)故障自愈等。下面我們講述SDH網(wǎng)中常見網(wǎng)元的特點和基本功能。 </p> <p> TM——終端復(fù)用器 </p> <p> 終端復(fù)用器用在網(wǎng)絡(luò)的終端站點上，例如一條鏈的兩個端點上，它是一個雙端口器件。它的作用是將支路端口的低速信號復(fù)用到線路端口的高速信號STM-N中，或從STM-N的信號中分出低速支路信號。請注意它的線路端口輸入/輸出一路STM-N信號，而支路端口卻可以輸出/輸入多路低速支路信號。在將低速支路信號復(fù)用進STM-N幀（將低速信號復(fù)用到線路）上時，有一個交叉的功能，例如：可將支路的一個STM-1信號復(fù)用進線路上的STM-16信號中的任意位置上，也就是指復(fù)用在1~16個STM-1的任一個位置上。將支路的2Mbit/s信號可復(fù)用到一個STM-1中63個VC12的任一個位置上去。對于華為設(shè)備，TM的線路端口（光口）一般以西向端口默認表示的。隨著網(wǎng)絡(luò)傳輸技術(shù)的不斷發(fā)展, 電力系統(tǒng)中基于寬帶數(shù)據(jù)網(wǎng)的應(yīng)用也越來越多。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="寧夏銷售光傳輸設(shè)備烽火STM-16,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847797656250/1749392.jpg"></div><p> SDH的產(chǎn)生背景 </p> <p> SDH技術(shù)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(shù)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(wù)數(shù)字網(wǎng)) 和FDDI(光纖分布式數(shù)據(jù)接口)等多種網(wǎng)絡(luò)技術(shù)。隨著信息社會的到來，人們希望現(xiàn)代信息傳輸網(wǎng)絡(luò)能快速、經(jīng)濟、有效地提供各種電路和業(yè)務(wù)，而上述網(wǎng)絡(luò)技術(shù)由于其業(yè)務(wù)的單調(diào)性，擴展的復(fù)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。為了保證電網(wǎng)安全、經(jīng)濟地運行, 必須配置調(diào)度、保護、遠程控制等系統(tǒng)。寧夏銷售光傳輸設(shè)備烽火STM-16</p><p style="text-indent:25px">將所有網(wǎng)元節(jié)點兩兩相連，就形成了網(wǎng)孔形網(wǎng)絡(luò)。寧夏銷售光傳輸設(shè)備烽火STM-16</p><p style="text-indent:25px">1.近年來，SDH作為新一代理想的傳輸體系，具有路由自動選擇能力，上下電路方便，維護、控制、管理功能強，標準統(tǒng)一，便于傳輸更高速率的業(yè)務(wù)等優(yōu)點，能很好地適應(yīng)通信網(wǎng)飛速發(fā)展的需要。SDH技術(shù)與一些先進技術(shù)相結(jié)合，如光波分復(fù)用（WDM）、ATM技術(shù)、Internet技術(shù)（IP over SDH）等，使SDH網(wǎng)絡(luò)的作用越來越大。SDH已被各國列入21世紀高速通信網(wǎng)的應(yīng)用項目，是電信界公認的數(shù)字傳輸網(wǎng)的發(fā)展方向，具有遠大的商用前景。深圳市騰云科創(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。為客戶提供質(zhì)量產(chǎn)品、完善的解決方案，積極響應(yīng)配合客戶做好售后服務(wù)，在業(yè)界贏得廣大客戶認可及一致好評。努力奉獻，您的滿意是我們一直的追求。寧夏銷售光傳輸設(shè)備烽火STM-16</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(shè)備、電子元器件、電子產(chǎn)品、建筑材料、通信設(shè)備(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)、辦公設(shè)備、五金交電、化工原料（不含危險及監(jiān)控化學(xué)品）的銷售；經(jīng)濟信息咨詢；經(jīng)營進出口業(yè)務(wù)。的公司，致力于發(fā)展為創(chuàng)新務(wù)實、誠實可信的企業(yè)。騰云科創(chuàng)擁有一支經(jīng)驗豐富、技術(shù)創(chuàng)新的專業(yè)研發(fā)團隊，以高度的專注和執(zhí)著為客戶提供SDH光傳輸設(shè)備，光端機，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備。騰云科創(chuàng)不斷開拓創(chuàng)新，追求出色，以技術(shù)為先導(dǎo)，以產(chǎn)品為平臺，以應(yīng)用為重點，以服務(wù)為保證，不斷為客戶創(chuàng)造更高價值，提供更優(yōu)服務(wù)。騰云科創(chuàng)始終關(guān)注通信產(chǎn)品市場，以敏銳的市場洞察力，實現(xiàn)與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1224191.html</p></div></div></div></div></div><div id="ed73u8m" class="page-right twoColRt"><div id="rbt88da" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="qvskmog" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img 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