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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>湖南代理光傳輸設(shè)備烽火PEOW,烽火</p><p><span>***更新：</span>2021-01-21 01:06:43</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="0c82agc" 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(hào)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="yim8ui8" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="8oakoui" class="box"><p><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?dāng)?shù)字通信和計(jì)算機(jī)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，湖南代理光傳輸設(shè)備烽火PEOW.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(huì)的到來，人們希望現(xiàn)代信息傳輸網(wǎng)絡(luò)能快速、經(jīng)濟(jì)，湖南代理光傳輸設(shè)備烽火PEOW、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(kuò)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(jì)于事。SDH就是在這種背景下發(fā)展起來的，湖南代理光傳輸設(shè)備烽火PEOW。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。湖南代理光傳輸設(shè)備烽火PEOW</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南代理光傳輸設(shè)備烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg"></div><p> SDH的概念 </p> <p> SDH[1]（Synchronous Digital Hierarchy，同步數(shù)字系列）光端機(jī)容量較大，一般是16E1到4032E1。 SDH是一種將復(fù)接、線路傳輸及交換功能融為一體、并由統(tǒng)一網(wǎng)管系統(tǒng)操作的綜合信息傳送網(wǎng)絡(luò)，是美國貝爾通信技術(shù)研究所提出來的同步光網(wǎng)絡(luò)（SONET）。國際電話電報(bào)咨詢**會(huì)（CCITT）（現(xiàn)ITU-T）于1988年接受了SONET 概念并重新命名為SDH，使其成為不但適用于光纖也適用于微波和衛(wèi)星傳輸?shù)耐ㄓ眉夹g(shù)體制。它可實(shí)現(xiàn)網(wǎng)絡(luò)有效管理、實(shí)時(shí)業(yè)務(wù)監(jiān)控、動(dòng)態(tài)網(wǎng)絡(luò)維護(hù)、不同廠商設(shè)備間的互通等多項(xiàng)功能，能**提高網(wǎng)絡(luò)資源利用率、降低管理及維護(hù)費(fèi)用、實(shí)現(xiàn)靈活可靠和***的網(wǎng)絡(luò)運(yùn)行與維護(hù)，因此是當(dāng)今世界信息領(lǐng)域在傳輸技術(shù)方面的發(fā)展和應(yīng)用的熱點(diǎn)，受到人們的***重視。 </p> <p> <br /> </p> <p> <br /> 甘肅光端機(jī)烽火CKU樹形網(wǎng)絡(luò)拓?fù)淇煽闯墒擎溞瓮負(fù)浜托切瓮負(fù)涞慕Y(jié)合。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南代理光傳輸設(shè)備烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg"></div><p> <span style="font-size:16px;font-family:"Microsoft YaHei";">SDH的特點(diǎn)：</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">（1）SDH傳輸系統(tǒng)在國際上有統(tǒng)一的幀結(jié)構(gòu)數(shù)字傳輸標(biāo)準(zhǔn)速率和標(biāo)準(zhǔn)的光路接口，使網(wǎng)管系統(tǒng)互通，因此有很好的橫向兼容性，它能與現(xiàn)有的PDH完全兼容，并容納各種新的業(yè)務(wù)信號(hào)，形成了全球統(tǒng)一的數(shù)字傳輸體制標(biāo)準(zhǔn)，提高了網(wǎng)絡(luò)的可靠性。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">（2）SDH接入系統(tǒng)的不同等級(jí)的碼流在幀結(jié)構(gòu)凈負(fù)荷區(qū)內(nèi)的排列非常有規(guī)律，而凈負(fù)荷與網(wǎng)絡(luò)是同步的，它利用軟件能將高速信號(hào)一次直接分插出低速支路信號(hào)，實(shí)現(xiàn)了一次復(fù)用的特性，克服了PDH準(zhǔn)同步復(fù)用方式對(duì)全部高速信號(hào)進(jìn)行逐級(jí)分解然后再生復(fù)用的過程，由于**簡化了DXC，減少了背靠背的接口復(fù)用設(shè)備，改善了網(wǎng)絡(luò)的業(yè)務(wù)傳送透明性。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">（3）由于采用了較先進(jìn)的分插復(fù)用器（ADM）、數(shù)字交叉連接（DXC）、網(wǎng)絡(luò)的自愈功能和重組功能就顯得非常強(qiáng)大，具有較強(qiáng)的生存率。因SDH幀結(jié)構(gòu)中安排了信號(hào)的5％開銷比特，它的網(wǎng)管功能顯得特別強(qiáng)大，并能統(tǒng)一形成網(wǎng)絡(luò)管理系統(tǒng)，為網(wǎng)絡(luò)的自動(dòng)化、智能化、信道的利用率以及降低網(wǎng)絡(luò)的維管費(fèi)和生存能力起到了積極作用。</span> </p><p> 環(huán)網(wǎng)——自愈環(huán) </p> <p> 自愈環(huán)的分類 </p> <p> 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。自愈環(huán)的分類可按保護(hù)的業(yè)務(wù)級(jí)別、環(huán)上業(yè)務(wù)的方向、網(wǎng)元節(jié)點(diǎn)間光纖數(shù)等來劃分。 </p> <p> 按環(huán)上業(yè)務(wù)的方向可將自愈環(huán)分為單向環(huán)和雙向環(huán)兩大類；按網(wǎng)元節(jié)點(diǎn)間的光纖數(shù)可將自愈環(huán)劃分為兩纖環(huán)（一對(duì)收/發(fā)光纖）和四纖環(huán)（兩對(duì)收發(fā)光纖）；按保護(hù)方式還可將自愈環(huán)劃分為通道保護(hù)環(huán)和復(fù)用段保護(hù)環(huán)兩大類。 </p> <p> 對(duì)于通道保護(hù)環(huán)，業(yè)務(wù)的保護(hù)是以通道為基礎(chǔ)的，也就是保護(hù)的是STM-N信號(hào)中的某個(gè)VC通道，根據(jù)環(huán)上的某一個(gè)別通道信號(hào)的傳輸質(zhì)量來決定是否倒換，通常利用收端是否收到簡單的AIS信號(hào)來決定該通道是否應(yīng)進(jìn)行倒換。 </p> <p> 復(fù)用段倒換環(huán)是以復(fù)用段為基礎(chǔ)的，根據(jù)環(huán)上傳輸?shù)膹?fù)用段信號(hào)的質(zhì)量決定是否倒換。倒換是由K1、K2（b1～b5）字節(jié)所攜帶的APS協(xié)議來啟動(dòng)的。復(fù)用段保護(hù)倒換的觸發(fā)條件是LOF、LOS、MS-AIS告警信號(hào)。 </p> <p> 通道保護(hù)環(huán)的倒換無需APS協(xié)議，采用“并發(fā)優(yōu)收”的倒換機(jī)理---簡單。 </p> <p> 復(fù)用段保護(hù)環(huán)要使用APS協(xié)議，倒換機(jī)理---較復(fù)雜。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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南代理光傳輸設(shè)備烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/4175838.jpg"></div><p> 免除了比較困難的光纜輔設(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(jìn)行，這就免除了全部的投資風(fēng)險(xiǎn)和維護(hù)工作，應(yīng)用機(jī)動(dòng)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(huì)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(jì)90年代以來西方國家的企業(yè)為提高其競爭力而公認(rèn)的世界性潮流?？傊劳蟹€(wěn)定的服務(wù)主體，有條件積極取得進(jìn)入電信市場競爭的合法地位，或與公網(wǎng)聯(lián)合，間接進(jìn)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(jì)劃經(jīng)濟(jì)向市場經(jīng)濟(jì)轉(zhuǎn)變的要求。 </p> <p> <br /> 主要進(jìn)行光功率放大以延長光傳輸距離；湖南代理光傳輸設(shè)備烽火PEOW</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司，成立于2015年專業(yè)從事通信產(chǎn)品購銷以及施工。湖南代理光傳輸設(shè)備烽火PEOW</p><p> <span style="font-size:16px;font-family:"Microsoft YaHei";">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。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">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。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">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。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">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。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">深圳市騰云科創(chuàng)信息咨詢有限公司以質(zhì)量好的服務(wù)、良好的信譽(yù)、雄厚的技術(shù)力量為廣大客戶提供質(zhì)量好服務(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(hào)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(hào)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(hào)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！</span> </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> 湖南代理光傳輸設(shè)備烽火PEOW</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司主要經(jīng)營范圍是通信產(chǎn)品，擁有一支專業(yè)技術(shù)團(tuán)隊(duì)和良好的市場口碑。公司業(yè)務(wù)涵蓋SDH光傳輸設(shè)備，光端機(jī)，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備等，價(jià)格合理，品質(zhì)有保證。公司將不斷增強(qiáng)企業(yè)重點(diǎn)競爭力，努力學(xué)習(xí)行業(yè)知識(shí)，遵守行業(yè)規(guī)范，植根于通信產(chǎn)品行業(yè)的發(fā)展。騰云科創(chuàng)立足于全國市場，依托強(qiáng)大的研發(fā)實(shí)力，融合前沿的技術(shù)理念，飛快響應(yīng)客戶的變化需求。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2934795.html</p></div></div></div></div></div><div id="kokycwa" class="page-right twoColRt"><div id="wwko0ga" class="box01 margin10 clearfix"><h3><a 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