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class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="3r9qx2a" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8fzqxwi" 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>四川烽火STM-64</p><p><span>***更新：</span>2020-06-20 07:18:12</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="x7hgx2p" 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="8dmd2ol" class="page-proshow02"><p class="title">詳細說明</p><div id="odahjne" class="box"><p>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，此時SDH的產(chǎn)生并憑借其眾多特性，使其在廣域網(wǎng)領(lǐng)域和**網(wǎng)領(lǐng)域得到了巨大的發(fā)展。 <p> 深圳市騰云科創(chuàng)信息咨詢有限公司是一家專業(yè)從事中興傳輸設(shè)備、華為SDH光傳輸設(shè)備、PCM接入設(shè)備、以及設(shè)備所配置的業(yè)務(wù)板卡等通信產(chǎn)品銷售及通信智能化項目施工的公司。我們秉承“客戶至上，誠信務(wù)實”的服務(wù)理念，用心、創(chuàng)新、高效，以質(zhì)量的專業(yè)技術(shù)為客戶提供比較好的需求服務(wù)，四川烽火STM-64。我司供應(yīng)光傳輸設(shè)備，SDH光端機，四川烽火STM-64，中興ZXMP系列產(chǎn)品：ZXMP </p> <p> S200｜ZXMP S320｜ZXMP S330｜ZXMP S325｜ZXMP S385｜ZXMP S390整機及各型號單板。供應(yīng)華為Metro系列產(chǎn)品：Metro1000｜Metro2050｜Metro3000｜Optix2500+｜Metro5000整機及各型號單板。供應(yīng)華為OSN系列產(chǎn)品：OSN1500B｜OSN2000｜OSN2500｜OSN3500｜OSN7500整機及各型號單板，四川烽火STM-64。供應(yīng)烽火IBAS系列產(chǎn)品： </p> <p> 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，您的滿意，是我們一直的追求！ </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川烽火STM-64" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg"></div><p style="text-indent:25px">同PDH相比, SDH組網(wǎng)的巨大的優(yōu)越性完全發(fā)揮出來了。用雙環(huán)相切、多環(huán)相切的主干網(wǎng)絡(luò)拓撲結(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, 克服雙環(huán)相切時節(jié)點保護可靠性差的問題。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, 而且SDH 光纖環(huán)有較強的自愈能力。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比,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。同PDH相比, SDH組網(wǎng)的巨大的優(yōu)越性完全發(fā)揮出來了。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川烽火STM-64" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg"></div><p> SDH的特點 </p> <p> （1）由于SDH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)性能有，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> 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