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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>云南SDH光端機(jī)烽火STM-64,烽火</p><p><span>***更新：</span>2021-01-05 16:12:09</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="32blczg" 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="gfxebse" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="pt7osov" class="box"><p><p style="text-indent:25px">SDH網(wǎng)絡(luò)是整個(gè)數(shù)字網(wǎng)的一部分，它的定時(shí)基準(zhǔn)應(yīng)是這個(gè)數(shù)字網(wǎng)的統(tǒng)一的定時(shí)基準(zhǔn)。時(shí)鐘同步，就是使通信網(wǎng)內(nèi)所有節(jié)點(diǎn)的時(shí)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(diǎn)的全部數(shù)字流正確有效地傳輸或交換，時(shí)鐘不同步，會(huì)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(dòng)損傷，造成數(shù)據(jù)出錯(cuò)，云南SDH光端機(jī)烽火STM-64，影響正常運(yùn)行，云南SDH光端機(jī)烽火STM-64，云南SDH光端機(jī)烽火STM-64。電流差動(dòng)保護(hù)的關(guān)鍵是線路兩側(cè)保護(hù)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(shí)，同步時(shí)鐘的提取方式是一個(gè)非常重要的問題。本期新增節(jié)點(diǎn)均從線路側(cè)提取同步信號(hào)。為了實(shí)時(shí)監(jiān)測(cè)貨物（打包的低速信號(hào)）在傳輸過程中是否有損壞。云南SDH光端機(jī)烽火STM-64</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="云南SDH光端機(jī)烽火STM-64,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/4175838.jpg"></div><p> 網(wǎng)管系統(tǒng)的傳輸通道由D1，D12開銷字節(jié)提供，網(wǎng)絡(luò)單元之間采用DCC通道， </p> <p> DCC通道終端在被連接的每個(gè)設(shè)備上，在相同的管理區(qū)域內(nèi)，通過以太網(wǎng)連接。例如某地市目前*有l(wèi)套網(wǎng)管系統(tǒng)。利用現(xiàn)有的網(wǎng)管設(shè)備，將新增網(wǎng)元納入到現(xiàn)有網(wǎng)管系統(tǒng)中，統(tǒng)一進(jìn)行管理。一套OTNM 2000其多可管理756個(gè)等效標(biāo)準(zhǔn)網(wǎng)元，現(xiàn)有的網(wǎng)管系統(tǒng)有足夠的能力管理包括本期新增的所有網(wǎng)元。網(wǎng)管管理能力是一套網(wǎng)管在保證規(guī)定性能指標(biāo)的情況下所能管理的比較大等效網(wǎng)元數(shù)。 </p> <p> 深圳騰云科創(chuàng)信息咨詢有限公司主營中興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。華為Metro系列產(chǎn)品：Metro1000｜Metro2050｜Metro3000｜Optix2500+｜Metro5000整機(jī)及各型號(hào)單板。華為OSN系列產(chǎn)品：OSN1500B｜OSN2000｜OSN2500｜OSN3500｜OSN7500整機(jī)及各型號(hào)單板。烽火IBAS系列產(chǎn)品： IBAS780A｜IBAS780B， PCM綜合接入設(shè)備介紹：FA16接入設(shè)備｜BX10接入設(shè)備廣西代理光傳輸設(shè)備烽火STM-16由于SDH有多種網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)，它所組成的網(wǎng)絡(luò)非常靈活。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="云南SDH光端機(jī)烽火STM-64,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/9165528.jpg"></div><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.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)、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。 </p><p> 隨著科學(xué)技術(shù)的不斷發(fā)展,各行各業(yè)為了滿足自身內(nèi)部的需求，將會(huì)建設(shè)更多，更復(fù)雜的**網(wǎng)絡(luò)，這些網(wǎng)絡(luò)必將承擔(dān)更多的任務(wù)。 </p> <p> 對(duì)于大多數(shù)專網(wǎng)，在目前的技術(shù)條件下，則應(yīng)利用公眾網(wǎng)實(shí)現(xiàn)企業(yè)或?qū)I(yè)部門的通信需求。利用公眾網(wǎng)滿足專業(yè)部門的需求具有各種不同的方式。如租用公眾網(wǎng)的光芯或傳輸容量，配置自己的交換設(shè)備。這就免除了其困難的光纜輔設(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> <br /> 為滿足整個(gè)電力部門目前和將來的所有通信需求, 需要做到話音。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="云南SDH光端機(jī)烽火STM-64,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105136719/8556415.jpg"></div><p style="text-indent:25px">根據(jù)電力通信點(diǎn)多面廣, 可靠性要求高的特點(diǎn), 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(shí)可在兩環(huán)相切的節(jié)點(diǎn)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(shí)節(jié)點(diǎn)保護(hù)可靠性差的問題。支路可根據(jù)實(shí)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(shí)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(shí), 無需人為干預(yù), 網(wǎng)絡(luò)能在極短的時(shí)間內(nèi)( ITU 2T規(guī)定為50ms 以內(nèi)) 自動(dòng)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(gè)節(jié)點(diǎn)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(jiǎn)化網(wǎng)絡(luò)結(jié)構(gòu), 實(shí)現(xiàn)強(qiáng)大的OAM功能, 降低傳輸費(fèi)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)。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)。陜西SDH光端機(jī)烽火8路帶交換功能快速以太網(wǎng)處理板</p><p style="text-indent:25px">電力通信要求確保電能的生產(chǎn)、輸送、分配、消費(fèi)在瞬間是同時(shí)完成的。云南SDH光端機(jī)烽火STM-64</p><p> <br /> </p> <p> SDH的特點(diǎn) </p> <p> （1）由于SDH有多種網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)，它所組成的網(wǎng)絡(luò)非常靈活，它能增強(qiáng)網(wǎng)監(jiān)，運(yùn)行管理和自動(dòng)配置功能，優(yōu)化了網(wǎng)絡(luò)性能，同時(shí)也使網(wǎng)絡(luò)運(yùn)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(shí)現(xiàn)了不同層次和各種拓?fù)浣Y(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(diǎn)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(jí)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(diǎn)來看，SDH屬于其比較低層的物理層，并未對(duì)其高層有嚴(yán)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> （5）SDH是嚴(yán)格同步的，從而保證了整個(gè)網(wǎng)絡(luò)穩(wěn)定可靠，誤碼少，且便于復(fù)用和調(diào)整； </p> <p> （6）標(biāo)準(zhǔn)的開放型光接口可以在基本光纜段上實(shí)現(xiàn)橫向兼容，降低了聯(lián)網(wǎng)成本。 </p> <p> <br /> </p> <p> <br /> 云南SDH光端機(jī)烽火STM-64</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司致力于通信產(chǎn)品，是一家貿(mào)易型的公司。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下SDH光傳輸設(shè)備，光端機(jī)，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備深受客戶的喜愛。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠信為本的理念，打造通信產(chǎn)品良好品牌。騰云科創(chuàng)立足于全國市場(chǎng)，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/2716188.html</p></div></div></div></div></div><div id="q8acjlc" class="page-right twoColRt"><div id="gacur8n" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="xmovxjg" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="dxewyfh" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" 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