四川光傳輸設備烽火IBAS 180 深圳市騰云科創(chuàng)供應-b2b網(wǎng)站_b2b電子商務平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="電力通信**網(wǎng)的特點隨著網(wǎng)絡傳輸技術的不斷發(fā)展,電力系統(tǒng)中基于寬帶數(shù)據(jù)網(wǎng)的應用也越來越多,如圖像監(jiān)控、實時數(shù)據(jù)采集、實時控制、各種管理信息系統(tǒng)(MIS)等,原先采用窄帶數(shù)據(jù)網(wǎng)承載的業(yè)務也逐步轉(zhuǎn)移到寬帶數(shù)據(jù)網(wǎng)上。除此之外,電力通信**網(wǎng)本身還"><meta name="keywords" content="四川光傳輸設備烽火IBAS 180,烽火"><link rel="canonical" href="http://m.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" 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clearfix"><h1>四川光傳輸設備烽火IBAS 180 深圳市騰云科創(chuàng)供應</h1><div id="32oqn4y" class="proBig"><div id="uyvs84n" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="e8tqsm3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="2v4n8bi" 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)品關鍵詞：</span>四川光傳輸設備烽火IBAS 180,烽火</p><p><span>***更新：</span>2020-07-11 09:24:34</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="o77jtmi" 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="zqcegv3" class="page-proshow02"><p class="title">詳細說明</p><div id="8a0fhlx" class="box"><p><p> 電力通信**網(wǎng)的特點 </p> <p> 隨著網(wǎng)絡傳輸技術的不斷發(fā)展, 電力系統(tǒng)中基于寬帶數(shù)據(jù)網(wǎng)的應用也越來越多, 如圖像監(jiān)控、實時數(shù)據(jù)采集、實時控制、各種管理信息系統(tǒng)(MIS) 等,原先采用窄帶數(shù)據(jù)網(wǎng)承載的業(yè)務也逐步轉(zhuǎn)移到寬帶數(shù)據(jù)網(wǎng)上。除此之外, 電力通信**網(wǎng)本身還具有一些特點: </p> <p> (1) 電力通信網(wǎng)基本上應以光纖通信為主, 以微波通信作備份或補充。 </p> <p> (2) 光纖網(wǎng)絡拓撲結(jié)構(gòu)復雜, 整個網(wǎng)絡節(jié)點數(shù)非常多, 需要傳輸設備有很強的組網(wǎng)和網(wǎng)絡管理能力,且對設備的可靠性要求非常高。 </p> <p> (3) 電力系統(tǒng)所敷設光纜通常芯數(shù)較少, 考慮到今后可能作為電信運營商, 應盡量節(jié)約光纖通信系統(tǒng)所占用的光纖芯數(shù)。 </p> <p> (4) 為滿足整個電力部門目前和將來的所有通信需求, 需要做到話音、視頻和數(shù)據(jù)多網(wǎng)融合。 </p> <p> （5) 目前的業(yè)務接口需求主要有POTS、2W/4W、E&M、V.24、V.35、ISDN、E1、E3/T 3、10Mb/100Mb以太網(wǎng)接口等, 未來的業(yè)務需求大，四川光傳輸設備烽火IBAS 180,多基于寬帶數(shù)據(jù)網(wǎng)。采用基于SDH 和MSTP，四川光傳輸設備烽火IBAS 180, 可使調(diào)度網(wǎng)實現(xiàn)計算機網(wǎng)絡的遠程互聯(lián)，四川光傳輸設備烽火IBAS 180, 在SDH平臺上實現(xiàn)以太網(wǎng)業(yè)務傳送功能, 從而實現(xiàn)二網(wǎng)合一, 且極大地降低網(wǎng)絡建設成本。 STM-N的信號是9行×270×N列的幀結(jié)構(gòu)。此處的N與STM-N的N相一致。四川光傳輸設備烽火IBAS 180</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川光傳輸設備烽火IBAS 180,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg"></div><p> SDH的缺點， </p> <p> 1，頻帶利用率低。 </p> <p> 可靠性和有效性是矛盾的，增加了有效性必將降低可靠性，增加了可靠性也會相應的使有效性降低。例如，收音機的選擇性增加，可選的電臺就增多，這樣就提高了選擇性。但是，由于這時頻帶相應的會變窄，必然會使音質(zhì)下降，也就降低了可靠性。 </p> <p> 2，指針調(diào)整機理復雜。 </p> <p> SDH體制可以從高速信號（STM-1）中直接下低速信號（例如2Mbit/s），省去了多級復用，解復用過程，這種功能的實現(xiàn)是通過指針機理來完成的。但是，指針功能的實現(xiàn)增加了系統(tǒng)的復雜性。**重要的是系統(tǒng)產(chǎn)生SDH的一種特有抖動—由指針調(diào)整引起的結(jié)合抖動。 </p> <p> 3，軟件的大量使用對系統(tǒng)的安全性的影響。 </p> <p> 在***無處不在的***，軟件的的大量使用，很容易受到***的破壞，加上人為操作，軟件故障，對系統(tǒng)的影響也是致命的。 </p> <p> <br /> 湖北SDH光端機烽火各種PDH支路信號復用進STM-N幀的過程都要經(jīng)歷映射、定位、復用三個步驟。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川光傳輸設備烽火IBAS 180,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105000000/3722756.jpg"></div><p style="text-indent:25px">SDH出現(xiàn)以前，沿用的數(shù)字傳輸設備均屬準同步數(shù)字系（ Plesiochronous Digital Hierarchy，縮寫為PDH）。SDH技術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。加之數(shù)字通信和計算機技術的發(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)務數(shù)字網(wǎng)) 和FDDI(光纖分布式數(shù)據(jù)接口)等多種網(wǎng)絡技術。隨著信息社會的到來，人們希望現(xiàn)代信息傳輸網(wǎng)絡能快速、經(jīng)濟、有效地提供各種電路和業(yè)務，而上述網(wǎng)絡技術由于其業(yè)務的單調(diào)性，擴展的復雜性，帶寬的局限性，*在原有框架內(nèi)修改或完善已無濟于事。SDH就是在這種背景下發(fā)展起來的。</p><p> SDH網(wǎng)絡的常見網(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，主要進行光功率放大以延長光傳輸距離；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、電信號抽樣、判決、再生整形、電/光變換，以達到不積累線路噪聲，保證線路上傳送信號波形的完好性。此處講的是后一種再生中繼器，REG是雙端口器件，只有兩個線路端口——W、E。 </p> <p> 它的作用是將w/e側(cè)的光信號經(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）時完全可以等效一個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因為要完成將低速支路信號分/插到STM-N中，所以不*要處理RSOH，而且還要處理MSOH；另外ADM和TM都具有交叉復用能力（有交叉連接功能），因此用ADM來等效REG有點大材小用了。隨著骨干傳輸容量不斷增大，城域傳輸網(wǎng)絡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="四川光傳輸設備烽火IBAS 180,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.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)絡的拓撲結(jié)構(gòu)用得很多，因為環(huán)形網(wǎng)具有較強的自愈功能。自愈環(huán)的分類可按保護的業(yè)務級別、環(huán)上業(yè)務的方向、網(wǎng)元節(jié)點間光纖數(shù)等來劃分。 </p> <p> 按環(huán)上業(yè)務的方向可將自愈環(huán)分為單向環(huán)和雙向環(huán)兩大類；按網(wǎng)元節(jié)點間的光纖數(shù)可將自愈環(huán)劃分為兩纖環(huán)（一對收/發(fā)光纖）和四纖環(huán)（兩對收發(fā)光纖）；按保護方式還可將自愈環(huán)劃分為通道保護環(huán)和復用段保護環(huán)兩大類。 </p> <p> 對于通道保護環(huán)，業(yè)務的保護是以通道為基礎的，也就是保護的是STM-N信號中的某個VC通道，根據(jù)環(huán)上的某一個別通道信號的傳輸質(zhì)量來決定是否倒換，通常利用收端是否收到簡單的AIS信號來決定該通道是否應進行倒換。 </p> <p> 復用段倒換環(huán)是以復用段為基礎的，根據(jù)環(huán)上傳輸?shù)膹陀枚涡盘柕馁|(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)議來啟動的。復用段保護倒換的觸發(fā)條件是LOF、LOS、MS-AIS告警信號。 </p> <p> 通道保護環(huán)的倒換無需APS協(xié)議，采用“并發(fā)優(yōu)收”的倒換機理---簡單。 </p> <p> 復用段保護環(huán)要使用APS協(xié)議，倒換機理---較復雜。同時也使網(wǎng)絡運行靈活、安全、可靠，使網(wǎng)絡的功能非常齊全和多樣化；寧夏光傳輸設備SDH烽火STM-16</p><p style="text-indent:25px">SDH接入系統(tǒng)的不同等級的碼流在幀結(jié)構(gòu)凈負荷區(qū)內(nèi)的排列非常有規(guī)律。四川光傳輸設備烽火IBAS 180</p><p> STM-N的幀結(jié)構(gòu)由3部分組成： </p> <p> 1、信息凈負荷（payload）。 </p> <p> 信息凈負荷位于STM-N幀中第1到第9行，第9×N+1到第270×N列，共9×261×N個字節(jié)。信息凈負荷是在STM-N幀結(jié)構(gòu)中存放將由STM-N傳送的各種用戶信息碼塊的地方。 </p> <p> 為了實時監(jiān)測貨物（打包的低速信號）在傳輸過程中是否有損壞，在將低速信號打包的過程中加入了通道開銷（POH）字節(jié)。POH作為凈負荷的一部分與信息碼塊一起裝載在STM-N這輛貨車上在SDH網(wǎng)中傳送，它負責對打包的貨物（低速信號）進行通道性能監(jiān)視、管理和控制。 </p> <p> 2、段開銷（SOH） </p> <p> 段，相當于一條大的傳輸通道，段開銷是為了保證信息凈負荷正常傳送所必須附加的網(wǎng)絡運行、管理和維護（OAM）字節(jié)。也就是說SOH完成對貨物整體的監(jiān)控，POH是完成對某一件特定的貨物進行監(jiān)控，當然，SOH和POH還有一些其他管理功能。 </p> <p> 段開銷又分為再生段開銷（RSOH）和復用段開銷（MSOH），可分別對相應的段層進行監(jiān)控，二者的區(qū)別在于監(jiān)管的范圍不同。 </p> <p> 3、管理單元指針（AU-PTR） </p> <p> 管理單元指針位于STM-N幀中第4行的***到第9×N列，共9×N個字節(jié)。AU-PTR是用來指示信息凈負荷的***個字節(jié)在STM-N幀內(nèi)的準確位置的指示符，以便接收端能根據(jù)這個位置指示符的值（指針值）準確分離信息凈負荷。四川光傳輸設備烽火IBAS 180</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2015-10-29，專業(yè)電力設備、電子元器件、電子產(chǎn)品、建筑材料、通信設備(中興通訊及華為技術各系列產(chǎn)品板件及整套設備的銷售與安裝，設備維護及板件返修，以及各設備可配置的單板，用戶電纜，中繼電纜等)、辦公設備、五金交電、化工原料（不含危險及監(jiān)控化學品）的銷售；經(jīng)濟信息咨詢；經(jīng)營進出口業(yè)務。等多項業(yè)務，主營業(yè)務涵蓋[ "SDH光傳輸設備", "光端機", "PCM接入設備", "PTN OTN光傳輸設備" ]。公司目前擁有高技術人才5人以下人，以不斷增強企業(yè)核心競爭力，加快企業(yè)技術創(chuàng)新，實現(xiàn)穩(wěn)健生產(chǎn)經(jīng)營。誠實、守信是對企業(yè)的經(jīng)營要求，也是我們做人的基本準則。公司致力于打造***的[ "SDH光傳輸設備", "光端機", "PCM接入設備", "PTN OTN光傳輸設備" ]。一直以來公司堅持以客戶為中心、[ "SDH光傳輸設備", "光端機", "PCM接入設備", "PTN OTN光傳輸設備" ]市場為導向，重信譽，保質(zhì)量，想客戶之所想，急用戶之所急，全力以赴滿足客戶的一切需要。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/567187.html</p></div></div></div></div></div><div id="wqnurya" class="page-right twoColRt"><div id="pegyvh2" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="gf77r8b" 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配件哪家強信息推薦自業(yè)物資供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="qvxpm3t" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/846569.html"><div><img 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