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href="http://m.cdcfah.com/xw/"><span>行業(yè)資訊</span></a></li><li id = "index_show"><a href="http://m.cdcfah.com/zh/"><span>展會(huì)信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="dmjl22r" class="twoCol"><div id="cq7kh8c" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/second-_txcp/">通信產(chǎn)品</a>?<a href="http://m.cdcfah.com/cp/third-txcp_jrsbtn/">接入設(shè)備</a>?江西烽火PEOW 深圳市騰云科創(chuàng)供應(yīng)</p><div id="ji4npgd" class="leftbox clearfix"><h1>江西烽火PEOW 深圳市騰云科創(chuàng)供應(yīng)</h1><div id="od4p39y" class="proBig"><div id="sbvrwt8" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="drgs747" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="wkz8xmt" 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>江西烽火PEOW,烽火</p><p><span>***更新：</span>2020-07-26 13:15:39</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="iwyakg7" 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="8n2xbsp" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="kt3zgdf" class="box"><p><p> SDH的基本傳輸原理 </p> <p> SDH采用的信息結(jié)構(gòu)等級(jí)稱為同步傳送模塊STM－N（Synchronous Transport，N=1，江西烽火PEOW，4， 16，江西烽火PEOW，64），**基本的模塊為STM－1，四個(gè)STM－1同步復(fù)用構(gòu)成STM－4，16個(gè)STM－1或四個(gè) STM－4同步復(fù)用構(gòu)成STM－16；SDH采用塊狀的幀結(jié)構(gòu)來承載信息，每幀由縱向9行和橫向 270×N列字節(jié)組成，每個(gè)字節(jié)含8bit，整個(gè)幀結(jié)構(gòu)分成段開銷（Section OverHead，江西烽火PEOW，SOH）區(qū)、STM－N凈負(fù)荷區(qū)和管理單元指針（AU PTR）區(qū)三個(gè)區(qū)域，其中段開銷區(qū)主要用于網(wǎng)絡(luò)的運(yùn)行、管理、維護(hù)及指配以保證信息能夠正常靈活地傳送，它又分為再生段開銷和復(fù)用段開銷；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。江西烽火PEOW</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.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。靜安區(qū)烽火550F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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/9165528.jpg"></div><p> <p> <p> 從技術(shù)上來看，接入層的相對(duì)帶寬需求較小，需要提供IP、TDM，可能還有ATM等綜合業(yè)務(wù)傳送。以SDH 系統(tǒng)為基礎(chǔ)并能夠提供IP 、ATM 傳送與處理的系統(tǒng)（包括TDM、IP與ATM接口，甚至包括IP 和ATM 交換模塊）將是解決接入層傳送的主要方法，這種方式可廉價(jià)地在一個(gè)業(yè)務(wù)提供點(diǎn)（POP）上提供高質(zhì)量專線、ATM 、IP 等業(yè)務(wù)的接入、傳送和保護(hù)。 </p> <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(yíng)商端局到用戶端的業(yè)務(wù)接入和業(yè)務(wù)收斂是對(duì)未來城域網(wǎng)接入系統(tǒng)的主要需求。 </p> </p> <p> <br /> </p> </p> <p> <br /> </p><p> SDH網(wǎng)絡(luò)的常見網(wǎng)元和功能 </p> <p> REG——再生中繼器 </p> <p> 光傳輸網(wǎng)的再生中繼器有兩種，一種是純光的再生中繼器，主要進(jìn)行光功率放大以延長(zhǎng)光傳輸距離；另一種是用于脈沖再生整形的電再生中繼器，主要通過光/電變換、電信號(hào)抽樣、判決、再生整形、電/光變換，以達(dá)到不積累線路噪聲，保證線路上傳送信號(hào)波形的完好性。此處講的是后一種再生中繼器，REG是雙端口器件，只有兩個(gè)線路端口——W、E。 </p> <p> 它的作用是將w/e側(cè)的光信號(hào)經(jīng)O/E、抽樣、判決、再生整形、E/O在e或w側(cè)發(fā)出。注意到?jīng)]有，REG與ADM相比*少了支路端口，所以ADM若本地不上/下話路（支路不上/下信號(hào)）時(shí)完全可以等效一個(gè)REG。 </p> <p> 真正的REG只需處理STM-N幀中的RSOH，且不需要交叉連接功能（w—e直通即可），而ADM和TM因?yàn)橐瓿蓪⒌退僦沸盘?hào)分/插到STM-N中，所以不*要處理RSOH，而且還要處理MSOH；另外ADM和TM都具有交叉復(fù)用能力（有交叉連接功能），因此用ADM來等效REG有點(diǎn)大材小用了。環(huán)形網(wǎng)拓?fù)鋵?shí)際上是指將鏈形拓?fù)涫孜蚕噙B。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西烽火PEOW,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/4175838.jpg"></div><p> 電源系統(tǒng)SDH設(shè)備采用一48伏直流電源，工作電壓應(yīng)滿足：輸入電壓范圍是-40V至-57V；電話衡量雜音電壓<2mV；峰峰值雜音電壓(0．300Hz)_<400mV。 </p> <p> 根據(jù)公式：電流=功率／電壓。各設(shè)備正常工作時(shí)的比較大電流等于滿配置功耗除以工作電壓。比較大電流再加上適當(dāng)富余量取整可得所需熔絲大小。 </p> <p> 時(shí)鐘同步系統(tǒng) </p> <p> SDH網(wǎng)元時(shí)鐘源的種類 </p> <p> (1)外部時(shí)鐘源——由SETPI功能塊提供輸入接口； </p> <p> (2)線路時(shí)鐘源一由SPI功能塊從STM．N線路信號(hào)中提??； </p> <p> (3)支路時(shí)鐘源——由PPI功能塊從PDH支路信號(hào)中提取，不過該時(shí)鐘一般不用，因?yàn)镾DH／PDH網(wǎng)邊界處的指針調(diào)整會(huì)影響時(shí)鐘質(zhì)量； </p> <p> (4)設(shè)備內(nèi)置時(shí)鐘源由SETS功能塊提供。 </p> <p> <br /> 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。北京烽火RET</p><p style="text-indent:25px">維護(hù)，產(chǎn)品維修，計(jì)算機(jī)系統(tǒng)集成施工。為客戶提供優(yōu)質(zhì)產(chǎn)品、完善的解決方案。江西烽火PEOW</p><p style="text-indent:25px">SDH出現(xiàn)以前，沿用的數(shù)字傳輸設(shè)備均屬準(zhǔn)同步數(shù)字系（ Plesiochronous Digital Hierarchy，縮寫為PDH）。SDH技術(shù)的誕生有著其必然性。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。江西烽火PEOW</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司創(chuàng)辦于2015-10-29，是一家貿(mào)易型的公司。經(jīng)過多年不斷的歷練探索和創(chuàng)新發(fā)展，騰云科創(chuàng)是一家有限責(zé)任公司企業(yè)，一直貫徹“以人為本，服務(wù)于社會(huì)”的經(jīng)營(yíng)理念;“優(yōu)質(zhì)高速，誠(chéng)守信譽(yù)，持續(xù)發(fā)展”的質(zhì)量方針。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" ]，價(jià)格合理，品質(zhì)有保證，深受廣大客戶的歡迎。騰云科創(chuàng)將以真誠(chéng)的服務(wù)、創(chuàng)新的理念、高品質(zhì)的產(chǎn)品，為彼此贏得全新的未來！</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/705476.html</p></div></div></div></div></div><div id="ic2npgs" class="page-right twoColRt"><div id="3jdkh88" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="bfuq8jf" class="recomPic likePro"><a href="http://m.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" 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