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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="wtq3du3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105205079/5635847.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="mfx8pbx" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火</p><p><span>***更新：</span>2021-01-27 02:07:05</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="wvxzwia" 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="f3iegnk" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="hgdf2iw" class="box"><p><p> <span style="font-size:16px;font-family:"Microsoft YaHei";">SDH多業(yè)務(wù)傳送平臺</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">電力專門用途網(wǎng)的組網(wǎng), 不單要求通信網(wǎng)絡(luò)選擇適當(dāng)?shù)木W(wǎng)絡(luò)拓?fù)? 使整個(gè)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(gè)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，青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡, 甚至與國際通信網(wǎng)接軌。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">傳統(tǒng)SDH在接入和傳送寬帶數(shù)據(jù)業(yè)務(wù)時(shí)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(jì)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，青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡, 采用基于SDH 的多業(yè)務(wù)傳送平臺(MSTP)。它利用EOS (Ethernet over SDH ) 技術(shù), 解決SDH 平臺上。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">以太網(wǎng)業(yè)務(wù)的接入和傳送應(yīng)用,支持端口捆綁( IEEE802，青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡. 3ad) 和生成樹算法( IEEE802.1D) , 支持VLAN ( IEEE802. 1Q ) 和QoS ( IEEE802.1p ) , 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(shí)現(xiàn)統(tǒng)計(jì)復(fù)用, 并且支持VC212 虛級聯(lián), 帶寬從1～ 48 個(gè)2M b平滑設(shè)置。</span> 環(huán)形網(wǎng)拓?fù)鋵?shí)際上是指將鏈形拓?fù)涫孜蚕噙B。青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105205079/5635847.jpg"></div><p> 隨著骨干傳輸容量不斷增大，城域傳輸網(wǎng)絡(luò)的接入能力也多樣化。但以IP為主的網(wǎng)絡(luò)業(yè)務(wù)仍然是不可預(yù)知的，這需要傳輸網(wǎng)絡(luò)具有更好的自適應(yīng)能力，而這種自適應(yīng)能力不**是網(wǎng)絡(luò)接口或網(wǎng)絡(luò)容量的適應(yīng)能力，而且要求網(wǎng)絡(luò)連接的自適應(yīng)能力?？偟膩碚f，低成本、靈活快速的完成運(yùn)營商端局到用戶端的業(yè)務(wù)接入和業(yè)務(wù)收斂是對未來城域網(wǎng)接入系統(tǒng)的主要需求。 </p> <p> 簡單地講，這種采用SDH傳輸以太網(wǎng)等多種業(yè)務(wù)的方式就是將不同的網(wǎng)絡(luò)層次的業(yè)務(wù)通過ＶＣ級聯(lián)的方式映射到SDH電路的各個(gè)時(shí)隙中，由SDH網(wǎng)絡(luò)提供完全透明的傳輸通道，從物理層的設(shè)備角度上看是一個(gè)集成的整體。這種解決方案可以大幅度地降低投資規(guī)模，減少設(shè)備占地面積，降低功耗，進(jìn)而降低網(wǎng)絡(luò)運(yùn)營商的運(yùn)營成本。同時(shí)，提供多業(yè)務(wù)的能力還可以使網(wǎng)絡(luò)運(yùn)營商能夠快速地部署網(wǎng)絡(luò)業(yè)務(wù)，提高業(yè)務(wù)收入，增強(qiáng)市場競爭能力。 </p> <p> 甘肅SDH光傳輸設(shè)備烽火 E1板卡目前環(huán)形網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)用得很多，因?yàn)榄h(huán)形網(wǎng)具有較強(qiáng)的自愈功能。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/9165528.jpg"></div><p> 傳輸網(wǎng)上的業(yè)務(wù)按流向可分為單向業(yè)務(wù)和雙向業(yè)務(wù)。以環(huán)網(wǎng)為例說明單向業(yè)務(wù)和雙向業(yè)務(wù)的區(qū)別。 </p> <p> 若A和C之間互通業(yè)務(wù)，A到C的業(yè)務(wù)路由假定是A→B→C，若此時(shí)C到A的業(yè)務(wù)路由是C→B→A，則業(yè)務(wù)從A到C和從C到A的路由相同，稱為一致路由。 </p> <p> 若此時(shí)C到A的路由是C→D→A，那么業(yè)務(wù)從A到C和業(yè)務(wù)從C到A的路由不同，稱為分離路由。 </p> <p> 我們稱一致路由的業(yè)務(wù)為雙向業(yè)務(wù)，分離路由的業(yè)務(wù)為單向業(yè)務(wù)。常見組網(wǎng)的業(yè)務(wù)方向和路由。 </p> <p> 深圳市騰云科創(chuàng)信息咨詢有限公司以質(zhì)量的服務(wù)、良好的信譽(yù)、雄厚的技術(shù)力量為廣大客戶提供質(zhì)量服務(wù)。我司供應(yīng)中興ZXMP系列產(chǎn)品：ZXMP S200｜ZXMP S320｜ZXMP S330｜ZXMP S325｜ZXMP S385｜ZXMP S390整機(jī)及各型號單板。供應(yīng)華為Metro系列產(chǎn)品：Metro1000｜Metro2050｜Metro3000｜Optix2500+｜Metro5000整機(jī)及各型號單板。供應(yīng)華為OSN系列產(chǎn)品：OSN1500B｜OSN2000｜OSN2500｜OSN3500｜OSN7500整機(jī)及各型號單板。供應(yīng)烽火IBAS系列產(chǎn)品： IBAS780A｜IBAS780B供應(yīng)PCM綜合接入設(shè)備：FA16接入設(shè)備｜BX10接入設(shè)備。努力奉獻(xiàn)，您的滿意是我們一直的追求！ </p><p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> SDH的發(fā)展趨勢：</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 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(hù)、控制、管理功能強(qiáng)，標(biāo)準(zhǔn)統(tǒng)一，便于傳輸更高速率的業(yè)務(wù)等優(yōu)點(diǎn)，能很好地適應(yīng)通信網(wǎng)飛速發(fā)展的需要。迄今，SDH得到了空前的應(yīng)用與發(fā)展。在標(biāo)準(zhǔn)化方面，已建立和即將建立的一系列建議已基本上覆蓋了SDH的方方面面。在干線網(wǎng)和長途網(wǎng)、中繼網(wǎng)、接入網(wǎng)中它開始廣泛應(yīng)用。且在光纖通信、微波通信、衛(wèi)星通信中也積極地開展研究與應(yīng)用。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"></span> 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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105000000/3722756.jpg"></div><p> SDH網(wǎng)絡(luò)的常見網(wǎng)元和功能 </p> <p> ADM——分/插復(fù)用器 </p> <p> 分/插復(fù)用器用于SDH傳輸網(wǎng)絡(luò)的轉(zhuǎn)接站點(diǎn)處，例如鏈的中間結(jié)點(diǎn)或環(huán)上結(jié)點(diǎn)，是SDH網(wǎng)上使用比較多、比較重要的一種網(wǎng)元，它是一個(gè)三端口的器件。 </p> <p> ADM有兩個(gè)線路端口和一個(gè)支路端口。兩個(gè)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(gè)線路端口。ADM的作用是將低速支路信號交叉復(fù)用進(jìn)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(jìn)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比較重要的一種網(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(gè)ADM可等效成兩個(gè)TM。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)。青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</p><p style="text-indent:25px">例如一條鏈的兩個(gè)端點(diǎn)上，它是一個(gè)雙端口器件。青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</p><p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> STM-N信號幀結(jié)構(gòu)的安排應(yīng)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)。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 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(gè)STM-1 信號通過字節(jié)間插復(fù)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(dāng)N個(gè)STM-1信號通過字節(jié)間插復(fù)用成STM-N信號時(shí)，單單是將STM-1信號的列按字節(jié)間插復(fù)用，行數(shù)恒定為9行不變。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 我們知道，信號在線路上串行傳輸時(shí)是逐個(gè)比特（bit）地進(jìn)行的，那么這個(gè)塊狀幀是怎樣在線路上進(jìn)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(gè)字節(jié)，并且逐個(gè)比特地傳輸，傳完一行再傳下一行，傳完一幀再傳下一幀。</span> </p> <p> <br /> </p> <p> <br /> 青海代理光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</p><p 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