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class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="r7hznz7" 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>青海光傳輸設(shè)備SDH烽火PEOW,烽火</p><p><span>***更新：</span>2021-01-08 16:51:04</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="d7xvbpl" 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="dz5px9b" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="blrhnrv" class="box"><p><p> 深圳市騰云科創(chuàng)信息咨詢有限公司 SDH的特點(diǎn) </p> <p> （1）由于SDH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)性能有，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，青海光傳輸設(shè)備SDH烽火PEOW，也可作支線通道。例如，我國(guó)的國(guó)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(lái)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)，青海光傳輸設(shè)備SDH烽火PEOW，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，青海光傳輸設(shè)備SDH烽火PEOW，且便于復(fù)用和調(diào)整； </p> <p> （6）標(biāo)準(zhǔn)的開放型光接口 </p> <p> 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。網(wǎng)絡(luò)節(jié)點(diǎn)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)。青海光傳輸設(shè)備SDH烽火PEOW</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海光傳輸設(shè)備SDH烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103808594/6520524.jpg"></div><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(lái)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(lái)決定是否倒換，通常利用收端是否收到簡(jiǎn)單的AIS信號(hào)來(lái)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(lái)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(wú)需APS協(xié)議，采用“并發(fā)優(yōu)收”的倒換機(jī)理---簡(jiǎn)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。甘肅光端機(jī)烽火ASON 780A從OSI模型的觀點(diǎn)來(lái)看，SDH屬于其比較低層的物理層。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海光傳輸設(shè)備SDH烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg"></div><p style="text-indent:25px">凈負(fù)荷區(qū)用于存放真正用于信息業(yè)務(wù)的比特和少量的用于通道維護(hù)管理的通道開銷字節(jié)；管理單元指針用來(lái)指示凈負(fù)荷區(qū)內(nèi)的信息首字節(jié)在STM－N幀內(nèi)的準(zhǔn)確位置以便接收時(shí)能正確分離凈負(fù)荷。SDH的幀傳輸時(shí)按由左到右、由上到下的順序排成串型碼流依次傳輸，每幀傳輸時(shí)間為125μs，每秒傳輸1／125×1000000幀，對(duì)STM－1而言每幀字節(jié)為8bit×（9×270×1）=19440bit，則STM－1的傳輸速率為19440×8000=155.520Mbit／s；而STM－4的傳輸速率為4×155.520Mbit／s=622.080Mbit／s；STM－16的傳輸速率為16×155.520（或4×622.080）=2488.320Mbit／s。</p><p> 樹形網(wǎng) </p> <p> <br /> </p> <p> <br /> </p> <p> 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> <p> <br /> </p> <p> <br /> </p> <p> 環(huán)形網(wǎng) </p> <p> <br /> </p> <p> <br /> </p> <p> 環(huán)形網(wǎng)拓?fù)鋵?shí)際上是指將鏈形拓?fù)涫孜蚕噙B，從而使網(wǎng)上任何一個(gè)網(wǎng)元節(jié)點(diǎn)都不對(duì)外開放的網(wǎng)絡(luò)拓?fù)湫问健＿@是當(dāng)前使用其多的網(wǎng)絡(luò)拓?fù)湫问?，主要是因?yàn)樗哂泻軓?qiáng)的生存性，即自愈功能較強(qiáng)。 </p> <p> <br /> </p> <p> <br /> </p> <p> 網(wǎng)孔形網(wǎng) </p> <p> <br /> </p> <p> <br /> </p> <p> 將所有網(wǎng)元節(jié)點(diǎn)兩兩相連，就形成了網(wǎng)孔形網(wǎng)絡(luò)。這種網(wǎng)絡(luò)拓?fù)錇閮删W(wǎng)元節(jié)點(diǎn)間提供多個(gè)傳輸路由，使網(wǎng)絡(luò)的可靠更強(qiáng)。但是由于系統(tǒng)的冗余度高，必會(huì)使系統(tǒng)有效性降低，成本高且結(jié)構(gòu)復(fù)雜。 </p> <p> <br /> </p> <p> <br /> </p> <p> 當(dāng)前用得其多的網(wǎng)絡(luò)拓?fù)涫擎溞魏铜h(huán)形，通過它們的靈活組合，可構(gòu)成更加復(fù)雜的網(wǎng)絡(luò)。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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海光傳輸設(shè)備SDH烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div><p> STM-N信號(hào)幀的重復(fù)頻率（也就是每秒傳送的幀數(shù)）是多少呢？ITU-T規(guī)定對(duì)于任何級(jí)別的STM-N幀，幀頻都是8000幀/秒，也就是幀的周期為恒定的125μs ，幀中每個(gè)字節(jié)提供的通道速率是64Kbit/s。 </p> <p> <br /> </p> <p> <br /> </p> <p> 由于幀周期的恒定使STM-N信號(hào)的速率有其規(guī)律性，例如STM-4的傳輸數(shù)速恒定的等于STM-1信號(hào)傳輸數(shù)速的4倍，STM-16恒定等于STM-1的16倍。而PDH中的E2信號(hào)速率≠E1信號(hào)速率的4倍。 </p> <p> STM-N信號(hào)幀的重復(fù)頻率（也就是每秒傳送的幀數(shù)）是多少呢？ITU-T規(guī)定對(duì)于任何級(jí)別的STM-N幀，幀頻都是8000幀/秒，也就是幀的周期為恒定的125μs ，幀中每個(gè)字節(jié)提供的通道速率是64Kbit/s。 </p> <p> <br /> </p> <p> <br /> </p> <p> 由于幀周期的恒定使STM-N信號(hào)的速率有其規(guī)律性，例如STM-4的傳輸數(shù)速恒定的等于STM-1信號(hào)傳輸數(shù)速的4倍，STM-16恒定等于STM-1的16倍。而PDH中的E2信號(hào)速率≠E1信號(hào)速率的4倍。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；寧夏SDH光端機(jī)烽火IBAS 180</p><p style="text-indent:25px">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。青海光傳輸設(shè)備SDH烽火PEOW</p><p style="text-indent:25px">隨著時(shí)代的革新,科技的進(jìn)步,通信產(chǎn)品技術(shù)已經(jīng)成為我們?nèi)粘Ｉ钜约肮ぷ髦斜夭豢缮俚囊徊糠?同時(shí)我國(guó)的通信業(yè)也得到了發(fā)展。在信息化時(shí)代下,通信行業(yè)作為一個(gè)新興的科學(xué)技術(shù)類行業(yè),在具有長(zhǎng)遠(yuǎn)的發(fā)展?jié)摿Φ耐瑫r(shí)也面臨著激烈的競(jìng)爭(zhēng)。中美貿(mào)易摩擦可能導(dǎo)致SDH光傳輸設(shè)備，光端機(jī)，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備格局生變。而隨著美韓市場(chǎng)5G率先加入，愛立信、諾基亞等有望先受益。但由于全球運(yùn)營(yíng)商經(jīng)營(yíng)面臨壓力，個(gè)別地區(qū)禁購(gòu)中國(guó)設(shè)備事宜仍有轉(zhuǎn)機(jī)。同時(shí)，自主可控更加緊迫，給北斗導(dǎo)航、天通通信、網(wǎng)絡(luò)安全帶來(lái)機(jī)會(huì)。從細(xì)分產(chǎn)品及服務(wù)來(lái)看，全球電力設(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(xiǎn)及監(jiān)控化學(xué)品）的銷售；經(jīng)濟(jì)信息咨詢；經(jīng)營(yíng)進(jìn)出口業(yè)務(wù)。行業(yè)競(jìng)爭(zhēng)層次明顯，在不同產(chǎn)品、服務(wù)領(lǐng)域有不同的競(jìng)爭(zhēng)對(duì)手。前瞻對(duì)全球統(tǒng)一通信產(chǎn)品和服務(wù)的銷售（尤其是中端企業(yè)領(lǐng)域），云產(chǎn)品和服務(wù)領(lǐng)域，視頻產(chǎn)品和服務(wù)方面，以及呼叫中心產(chǎn)品和服務(wù)方面的競(jìng)爭(zhēng)對(duì)手進(jìn)行了整理和歸納。人工智能有限責(zé)任公司企業(yè)發(fā)展進(jìn)入快車道，近兩年實(shí)現(xiàn)了真正的跨越式發(fā)展。預(yù)計(jì)2018年的主旋律仍將是人工智能技術(shù)的產(chǎn)業(yè)化落地，將會(huì)有更多的傳統(tǒng)企業(yè)借助AI技術(shù)實(shí)現(xiàn)智能化轉(zhuǎn)型。青海光傳輸設(shè)備SDH烽火PEOW</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司致力于通信產(chǎn)品，是一家貿(mào)易型公司。公司業(yè)務(wù)分為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，目前不斷進(jìn)行創(chuàng)新和服務(wù)改進(jìn)，為客戶提供良好的產(chǎn)品和服務(wù)。公司從事通信產(chǎn)品多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批**的專業(yè)化的隊(duì)伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。騰云科創(chuàng)立足于全國(guó)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(lái)源地址: http://www.cdcfah.com/cp/2759394.html</p></div></div></div></div></div><div id="rv5jzn7" class="page-right twoColRt"><div id="7l7fdjd" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="ftzvr79" 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) 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