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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ngyfcjg" 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>重慶全新光傳輸設(shè)備烽火NMU,烽火</p><p><span>***更新：</span>2020-09-25 10:19:49</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="qfhjln2" 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="mldvhj3" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="lpg8byi" class="box"><p><p> 電力網(wǎng)的發(fā)展對電力系統(tǒng)**通信網(wǎng)提出了更高的要求, 電力通信要求確保電能的生產(chǎn)、輸送、分配、消費在瞬間是同時完成的。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(yuǎn)程控制等系統(tǒng)。這些系統(tǒng)的所有信息傳輸都必須由通信系統(tǒng)提供通道。由此可見, 通信在電力系統(tǒng)中的作用是非常關(guān)鍵的。隨著經(jīng)濟的發(fā)展, 電力系統(tǒng)容量急劇增加, 隨之而來的是輸電超高壓化, 接入業(yè)務(wù)多樣化。 </p> <p> 電力系統(tǒng)一旦發(fā)生故障, 如果通信不暢, 不能及時調(diào)度指揮,就會擴大***范圍, 造成大面積停電甚至系統(tǒng)瓦解,不僅經(jīng)濟損失十分慘重, 而且會給社會造成嚴(yán)重影響。因此電力系統(tǒng)的通信要有非常高的可靠性。由于SDH技術(shù)具有特有的優(yōu)勢，重慶全新光傳輸設(shè)備烽火NMU, 采用SDH技術(shù)組網(wǎng)不僅適合現(xiàn)代通信發(fā)展的需要,而且特別適合電力系統(tǒng)通信的需要。SDH網(wǎng)是由不同類型的SDH網(wǎng)元設(shè)備, 如終端復(fù)用設(shè)備(TM )、再生器(REG)、分插復(fù)用設(shè)備(ADM )、數(shù)字交叉連接(DXC) 設(shè)備等, 通過光纜互連而成的, 由這些網(wǎng)元設(shè)備完成SDH 網(wǎng)的上下業(yè)務(wù)、交叉連接業(yè)務(wù)，重慶全新光傳輸設(shè)備烽火NMU、網(wǎng)絡(luò)故障自愈等傳送功能。SDH網(wǎng)的網(wǎng)絡(luò)節(jié)點(網(wǎng)元) 和傳輸線路的幾何排列就構(gòu)成了網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)。網(wǎng)絡(luò)的基本拓?fù)浣Y(jié)構(gòu)大致有這樣幾種方式: 鏈形、星形、樹形，重慶全新光傳輸設(shè)備烽火NMU、環(huán)形和網(wǎng)格形等。網(wǎng)絡(luò)的有效性、可靠性和經(jīng)濟性在很大程度上與其拓?fù)浣Y(jié)構(gòu)有關(guān)。重慶全新光傳輸設(shè)備烽火NMU</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="重慶全新光傳輸設(shè)備烽火NMU,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg"></div><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(rèn)表示的。湖南SDH光傳輸設(shè)備烽火STM-64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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="重慶全新光傳輸設(shè)備烽火NMU,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div><p style="text-indent:25px">SDH網(wǎng)絡(luò)是整個數(shù)字網(wǎng)的一部分，它的定時基準(zhǔn)應(yīng)是這個數(shù)字網(wǎng)的統(tǒng)一的定時基準(zhǔn)。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(yù)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(dǎo)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(dāng)復(fù)接數(shù)字通信設(shè)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。</p><p style="text-indent:25px">凈負(fù)荷區(qū)用于存放真正用于信息業(yè)務(wù)的比特和少量的用于通道維護管理的通道開銷字節(jié)；管理單元指針用來指示凈負(fù)荷區(qū)內(nèi)的信息首字節(jié)在STM－N幀內(nèi)的準(zhǔn)確位置以便接收時能正確分離凈負(fù)荷。SDH的幀傳輸時按由左到右、由上到下的順序排成串型碼流依次傳輸，每幀傳輸時間為125μs，每秒傳輸1／125×1000000幀，對STM－1而言每幀字節(jié)為8bit×（9×270×1）=19440bit，則STM－1的傳輸速率為19440×8000=155.520Mbit／s；而STM－4的傳輸速率為4×155.520Mbit／s=622.080Mbit／s；STM－16的傳輸速率為16×155.520（或4×622.080）=2488.320Mbit／s。標(biāo)準(zhǔn)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><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="重慶全新光傳輸設(shè)備烽火NMU,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105205079/5635847.jpg"></div><p> STM-N的幀結(jié)構(gòu)由3部分組成： </p> <p> 1、信息凈負(fù)荷（payload）。 </p> <p> 信息凈負(fù)荷位于STM-N幀中第1到第9行，第9×N+1到第270×N列，共9×261×N個字節(jié)。信息凈負(fù)荷是在STM-N幀結(jié)構(gòu)中存放將由STM-N傳送的各種用戶信息碼塊的地方。 </p> <p> 為了實時監(jiān)測貨物（打包的低速信號）在傳輸過程中是否有損壞，在將低速信號打包的過程中加入了通道開銷（POH）字節(jié)。POH作為凈負(fù)荷的一部分與信息碼塊一起裝載在STM-N這輛貨車上在SDH網(wǎng)中傳送，它負(fù)責(zé)對打包的貨物（低速信號）進行通道性能監(jiān)視、管理和控制。 </p> <p> 2、段開銷（SOH） </p> <p> 段，相當(dāng)于一條大的傳輸通道，段開銷是為了保證信息凈負(fù)荷正常傳送所必須附加的網(wǎng)絡(luò)運行、管理和維護（OAM）字節(jié)。也就是說SOH完成對貨物整體的監(jiān)控，POH是完成對某一件特定的貨物進行監(jiān)控，當(dāng)然，SOH和POH還有一些其他管理功能。 </p> <p> 段開銷又分為再生段開銷（RSOH）和復(fù)用段開銷（MSOH），可分別對相應(yīng)的段層進行監(jiān)控，二者的區(qū)別在于監(jiān)管的范圍不同。 </p> <p> 3、管理單元指針（AU-PTR） </p> <p> 管理單元指針位于STM-N幀中第4行的***到第9×N列，共9×N個字節(jié)。AU-PTR是用來指示信息凈負(fù)荷的***個字節(jié)在STM-N幀內(nèi)的準(zhǔn)確位置的指示符，以便接收端能根據(jù)這個位置指示符的值（指針值）準(zhǔn)確分離信息凈負(fù)荷。電力系統(tǒng)一旦發(fā)生故障, 如果通信不暢, 不能及時調(diào)度指揮,就會擴大***范圍。重慶全新光傳輸設(shè)備烽火NMU</p><p style="text-indent:25px">網(wǎng)絡(luò)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(luò)的拓?fù)浣Y(jié)構(gòu)。重慶全新光傳輸設(shè)備烽火NMU</p><p style="text-indent:25px">通信產(chǎn)品指人與人或人與自然之間通過某種行為或媒介進行的信息交流與傳遞，從廣義上指需要信息的雙方或多方在不違背各自意愿的情況下采用任意方法，任意媒質(zhì)，將信息從某方準(zhǔn)確安全地傳送到另方。在這樣的背景下，處于通信產(chǎn)業(yè)鏈中間環(huán)節(jié)的SDH光傳輸設(shè)備，光端機，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備行業(yè)將面臨更大的市場需求，通信技術(shù)服務(wù)行業(yè)將持續(xù)飛速發(fā)展。通信產(chǎn)品不僅成就通訊業(yè)收入增長的**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(xí)慣，造就了一批風(fēng)光無限的新興貿(mào)易型企業(yè)。基礎(chǔ)電信運營商為應(yīng)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(wù)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(shù)服務(wù)行業(yè)開拓廣闊的市場空間。重慶全新光傳輸設(shè)備烽火NMU</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，是一家集研發(fā)、設(shè)計、生產(chǎn)和銷售為一體的專業(yè)化公司。公司自創(chuàng)立以來，投身于SDH光傳輸設(shè)備，光端機，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備，是通信產(chǎn)品的主力軍。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)注自身，在風(fēng)云變化的時代，對自身的建設(shè)毫不懈怠，高度的專注與執(zhí)著使騰云科創(chuàng)在行業(yè)的從容而自信。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1417762.html</p></div></div></div></div></div><div id="l7bif8a" class="page-right twoColRt"><div id="ydfhegn" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hbi2kr8" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img 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