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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="fhrlzxj" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244847651777344/7289118.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="dnh5vhn" 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>廣西光傳輸設(shè)備價格烽火PEOW,烽火</p><p><span>***更新：</span>2020-08-30 01:18:39</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="5dfd7r7" 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(jī): </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="eayomks" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="ae2sum6" class="box"><p><p> SDH多業(yè)務(wù)傳送平臺 </p> <p> 電力**網(wǎng)的組網(wǎng), 不僅要求通信網(wǎng)絡(luò)選擇適當(dāng)?shù)木W(wǎng)絡(luò)拓?fù)洌瑥V西光傳輸設(shè)備價格烽火PEOW, 使整個網(wǎng)絡(luò)具有高可靠性, 而且要求其能大容量、高質(zhì)量、高速率地進(jìn)行多業(yè)務(wù)傳輸, 既使整個通信系統(tǒng)在電力系統(tǒng)內(nèi)部暢通無阻, 又要與外界公共網(wǎng)聯(lián)系十分方便, 甚至與國際通信網(wǎng)接軌。 </p> <p> 傳統(tǒng)SDH在接入和傳送寬帶數(shù)據(jù)業(yè)務(wù)時無法直接提供在局域網(wǎng)中占統(tǒng)治地位的以太網(wǎng)接口; 無法支持統(tǒng)計復(fù)用和有效使用傳輸帶寬; 沒有帶寬靈活的容器裝載寬帶數(shù)據(jù)業(yè)務(wù)。為了能較好地發(fā)展, 采用基于SDH 的多業(yè)務(wù)傳送平臺(MSTP)，廣西光傳輸設(shè)備價格烽火PEOW。它利用EOS (Ethernet over SDH ) 技術(shù), 解決SDH 平臺上 </p> <p> 以太網(wǎng)業(yè)務(wù)的接入和傳送應(yīng)用,支持端口捆綁( IEEE802. 3ad) 和生成樹算法( IEEE802.1D) , 支持VLAN ( IEEE802. 1Q ) 和QoS ( IEEE802，廣西光傳輸設(shè)備價格烽火PEOW.1p ) , 可以直接提供10Mb/100Mb自適應(yīng)以太網(wǎng)接口, 通過內(nèi)置2 層、3 層以太網(wǎng)交換機(jī)實現(xiàn)統(tǒng)計復(fù)用, 并且支持VC212 虛級聯(lián), 帶寬從1～ 48 個2M b平滑設(shè)置。由于幀周期的恒定使STM-N信號的速率有其規(guī)律性。廣西光傳輸設(shè)備價格烽火PEOW</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西光傳輸設(shè)備價格烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847651777344/7289118.jpg"></div><p> SDH網(wǎng)絡(luò)的常見網(wǎng)元和功能 </p> <p> DXC——數(shù)字交叉連接設(shè)備 </p> <p> 數(shù)字交叉連接設(shè)備完成的主要是STM-N信號的交叉連接功能，它是一個多端口器件，它實際上相當(dāng)于一個交叉矩陣，完成各個信號間的交叉連接。 </p> <p> DXC可將輸入的m路STM-N信號交叉連接到輸出的n路STM-N信號上，上圖表示有m條入光纖和n條出光纖。DXC的**是交叉連接，功能強(qiáng)的DXC能完成高速（例STM-16）信號在交叉矩陣內(nèi)的低級別交叉（例如VC12級別的交叉）。 </p> <p> 通常用DXCm/n來表示一個DXC的類型和性能（注m≥n），m表示可接入DXC的比較高速率等級，n表示在交叉矩陣中能夠進(jìn)行交叉連接的比較低速率級別。m越大表示DXC的承載容量越大；n越小表示DXC的交叉靈活性越大。 </p> <p> <br /> 青海光傳輸設(shè)備烽火PEOW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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西光傳輸設(shè)備價格烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105136719/8556415.jpg"></div><p> SDH的基本傳輸原理 </p> <p> SDH采用的信息結(jié)構(gòu)等級稱為同步傳送模塊STM－N（Synchronous Transport，N=1，4， 16，64），**基本的模塊為STM－1，四個STM－1同步復(fù)用構(gòu)成STM－4，16個STM－1或四個 STM－4同步復(fù)用構(gòu)成STM－16；SDH采用塊狀的幀結(jié)構(gòu)來承載信息，每幀由縱向9行和橫向 270×N列字節(jié)組成，每個字節(jié)含8bit，整個幀結(jié)構(gòu)分成段開銷（Section OverHead，SOH）區(qū)、STM－N凈負(fù)荷區(qū)和管理單元指針（AU PTR）區(qū)三個區(qū)域，其中段開銷區(qū)主要用于網(wǎng)絡(luò)的運行、管理、維護(hù)及指配以保證信息能夠正常靈活地傳送，它又分為再生段開銷和復(fù)用段開銷； </p><p> 電源系統(tǒng)SDH設(shè)備采用一48伏直流電源，工作電壓應(yīng)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。 </p> <p> 根據(jù)公式：電流=功率／電壓。各設(shè)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(dāng)富余量取整可得所需熔絲大小。 </p> <p> 時鐘同步系統(tǒng) </p> <p> SDH網(wǎng)元時鐘源的種類 </p> <p> (1)外部時鐘源——由SETPI功能塊提供輸入接口； </p> <p> (2)線路時鐘源一由SPI功能塊從STM．N線路信號中提??； </p> <p> (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； </p> <p> (4)設(shè)備內(nèi)置時鐘源由SETS功能塊提供。 </p> <p> <br /> 它能增強(qiáng)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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西光傳輸設(shè)備價格烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg"></div><p> 基本的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu) </p> <p> SDH網(wǎng)是由SDH網(wǎng)元設(shè)備通過光纜互連而成的，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)。網(wǎng)絡(luò)的有效性、可靠性和經(jīng)濟(jì)性在很大程度上與其拓?fù)浣Y(jié)構(gòu)有關(guān)。 </p> <p> 網(wǎng)絡(luò)拓?fù)涞幕窘Y(jié)構(gòu)有鏈形、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(luò)拓?fù)涫菍⒕W(wǎng)中的所有節(jié)點一一串聯(lián)，而首尾兩端開放。這種拓?fù)涞奶攸c是較經(jīng)濟(jì)，在SDH網(wǎng)的早期用得較多，主要用于專網(wǎng)如鐵路網(wǎng)中。 </p> <p> 星形網(wǎng) </p> <p> 星形網(wǎng)絡(luò)拓?fù)涫菍⒕W(wǎng)中一網(wǎng)元做為中心節(jié)點設(shè)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(wù)都要經(jīng)過這個特殊節(jié)點轉(zhuǎn)接。 </p> <p> <br /> </p> <p> <br /> 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。廣西光傳輸設(shè)備價格烽火PEOW</p><p style="text-indent:25px">這種網(wǎng)絡(luò)拓?fù)錇閮删W(wǎng)元節(jié)點間提供多個傳輸路由，使網(wǎng)絡(luò)的可靠更強(qiáng)。廣西光傳輸設(shè)備價格烽火PEOW</p><p style="text-indent:25px">根據(jù)電力通信點多面廣, 可靠性要求高的特點, 主干傳輸網(wǎng)可采用光纖自愈環(huán)的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu), 也可以采用雙環(huán)相切、多環(huán)相切的主干網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu), 采用相切環(huán)時可在兩環(huán)相切的節(jié)點上采用雙環(huán)網(wǎng)元設(shè)備交叉保護(hù), 克服雙環(huán)相切時節(jié)點保護(hù)可靠性差的問題。支路可根據(jù)實際需要采用鏈形、星形、樹形等結(jié)構(gòu)。另外, 采用SDH 設(shè)備的光纖自愈環(huán)可實現(xiàn)多種形式的通道保護(hù), 而且SDH 光纖環(huán)有較強(qiáng)的自愈能力。所謂自愈就是指在網(wǎng)絡(luò)發(fā)生故障(例如光纖斷裂)時, 無需人為干預(yù), 網(wǎng)絡(luò)能在極短的時間內(nèi)( ITU 2T規(guī)定為50ms 以內(nèi)) 自動恢復(fù)傳輸, 使用戶幾乎感覺不到網(wǎng)絡(luò)出了故障。傳統(tǒng)的組網(wǎng)概念中, 提高傳輸設(shè)備利用率是**關(guān)鍵的, 為了增加線路的占空系數(shù), 在每個節(jié)點都建立了許多直接通道, 致使網(wǎng)絡(luò)結(jié)構(gòu)非常復(fù)雜。而利用SDH組網(wǎng), 使用SDH提供的豐富的開銷字節(jié), 就可以極大簡化網(wǎng)絡(luò)結(jié)構(gòu), 實現(xiàn)強(qiáng)大的OAM功能, 降低傳輸費用并支持新業(yè)務(wù)的發(fā)展, 這正符合了現(xiàn)代通信發(fā)展的目標(biāo)。廣西光傳輸設(shè)備價格烽火PEOW</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司創(chuàng)立于2015-10-29，總部位于廣東省深圳市，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(hù)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(jì)信息咨詢；經(jīng)營進(jìn)出口業(yè)務(wù)。的公司。騰云科創(chuàng)深耕行業(yè)多年，始終以客戶的需求為向?qū)?，為客戶提供高品質(zhì)的SDH光傳輸設(shè)備，光端機(jī)，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備。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)始終關(guān)注自身，在風(fēng)云變化的時代，我們對自身的建設(shè)毫不懈怠，高度的專注與執(zhí)著使我們在行業(yè)的從容而自信。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/1088723.html</p></div></div></div></div></div><div id="nzvxtbn" 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