廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板深圳市騰云科創(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="SDH的概念 SDH[1]（SynchronousDigitalHierarchy，同步數(shù)字系列）光端機容量較大，一般是16E1到4032E1。SDH是一種將復接、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"><meta name="keywords" content="廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板,烽火"><link rel="canonical" href="http://www.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" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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class="leftbox clearfix"><h1>廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板深圳市騰云科創(chuàng)供應</h1><div id="jnztf3y" class="proBig"><div id="7nwolp7" 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="hqszgs8" 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="j3legxo" 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(guān)鍵詞：</span>廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板,烽火</p><p><span>***更新：</span>2021-01-31 00:19:12</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="rqcebxz" 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="mlspg3y" class="page-proshow02"><p class="title">詳細說明</p><div id="n8x2yp8" class="box"><p><p> SDH的概念 </p> <p> SDH[1]（Synchronous Digital Hierarchy，同步數(shù)字系列）光端機容量較大，一般是16E1到4032E1。 SDH是一種將復接、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，是美國貝爾通信技術(shù)研究所提出來的同步光網(wǎng)絡（SONET）。國際電話電報咨詢**會（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。它可實現(xiàn)網(wǎng)絡有效管理、實時業(yè)務監(jiān)控、動態(tài)網(wǎng)絡維護，廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板、不同廠商設備間的互通等多項功能，廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板，能**提高網(wǎng)絡資源利用率、降低管理及維護費用、實現(xiàn)靈活可靠和***的網(wǎng)絡運行與維護，因此是當今世界信息領域在傳輸技術(shù)方面的發(fā)展和應用的熱點，廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板，受到人們的***重視。 </p> <p> <br /> </p> <p> <br /> 將所有網(wǎng)元節(jié)點兩兩相連，就形成了網(wǎng)孔形網(wǎng)絡。廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.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(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。加之數(shù)字通信和計算機技術(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(shù)。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(shù)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。青海SDH光傳輸設備烽火Citrans 550F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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105136719/8556415.jpg"></div><p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 電源系統(tǒng)SDH設備采用一48伏直流電源，工作電壓應滿足：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。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 根據(jù)公式：電流=功率／電壓。各設備正常工作時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富余量取整可得所需熔絲大小。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 時鐘同步系統(tǒng)</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">SDH網(wǎng)元時鐘源的種類</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(1)外部時鐘源——由SETPI功能塊提供輸入接口；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(2)線路時鐘源一由SPI功能塊從STM．N線路信號中提取；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(3)支路時鐘源——由PPI功能塊從PDH支路信號中提取，不過該時鐘一般不用，因為SDH／PDH網(wǎng)邊界處的指針調(diào)整會影響時鐘質(zhì)量；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(4)設備內(nèi)置時鐘源由SETS功能塊提供。</span> </p> <p> <br /> </p> <p> <br /> </p> <span style="font-size:16px;font-family:"Microsoft YaHei";"></span><p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> SDH的發(fā)展趨勢：</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> SDH作為新一代理想的傳輸體系，具有路由自動選擇能力，上下電路方便，維護、控制、管理功能強，標準統(tǒng)一，便于傳輸更高速率的業(yè)務等優(yōu)點，能很好地適應通信網(wǎng)飛速發(fā)展的需要。迄今，SDH得到了空前的應用與發(fā)展。在標準化方面，已建立和即將建立的一系列建議已基本上覆蓋了SDH的方方面面。在干線網(wǎng)和長途網(wǎng)、中繼網(wǎng)、接入網(wǎng)中它開始廣泛應用。且在光纖通信、微波通信、衛(wèi)星通信中也積極地開展研究與應用。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"></span> 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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div><p> <span style="font-size:16px;font-family:"Microsoft YaHei";">SDH的缺點，</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 1，頻帶利用率低。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 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。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 2，指針調(diào)整機理復雜。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 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。比較重要的是系統(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。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 3，軟件的大量使用對系統(tǒng)的安全性的影響。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">在***無處不在的***，軟件的的大量使用，很容易受到破壞，加上人為操作，軟件故障，對系統(tǒng)的影響也是致命的。</span> </p> <p> <br /> </p> <p> <br /> 網(wǎng)絡的有效性、可靠性和經(jīng)濟性在很大程度上與其拓撲結(jié)構(gòu)有關(guān)。青海光傳輸設備價格烽火STM-64</p><p style="text-indent:25px">SDH的誕生解決了由于入戶媒質(zhì)的帶寬限制而跟不上骨干網(wǎng)和用戶業(yè)務需求的發(fā)展。廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板</p><p> 樹形網(wǎng) </p> <p> <br /> </p> <p> <br /> </p> <p> 樹形網(wǎng)絡拓撲可看成是鏈形拓撲和星形拓撲的結(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)拓撲實際上是指將鏈形拓撲首尾相連，從而使網(wǎng)上任何一個網(wǎng)元節(jié)點都不對外開放的網(wǎng)絡拓撲形式。這是當前使用其多的網(wǎng)絡拓撲形式，主要是因為它具有很強的生存性，即自愈功能較強。 </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)點兩兩相連，就形成了網(wǎng)孔形網(wǎng)絡。這種網(wǎng)絡拓撲為兩網(wǎng)元節(jié)點間提供多個傳輸路由，使網(wǎng)絡的可靠更強。但是由于系統(tǒng)的冗余度高，必會使系統(tǒng)有效性降低，成本高且結(jié)構(gòu)復雜。 </p> <p> <br /> </p> <p> <br /> </p> <p> 當前用得其多的網(wǎng)絡拓撲是鏈形和環(huán)形，通過它們的靈活組合，可構(gòu)成更加復雜的網(wǎng)絡。廣西光傳輸設備價格烽火8路帶交換功能快速以太網(wǎng)處理板</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司位于沙井街道蠔四社區(qū)街尾塘一巷5號幸福家園A棟、B棟、C棟、D棟D棟110D。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個細節(jié)，公司旗下SDH光傳輸設備，光端機，PCM接入設備，PTN OTN光傳輸設備深受客戶的喜愛。公司將不斷增強企業(yè)重點競爭力，努力學習行業(yè)知識，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)秉承“客戶為尊、服務為榮、創(chuàng)意為先、技術(shù)為實”的經(jīng)營理念，全力打造公司的重點競爭力。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/3083000.html</p></div></div></div></div></div><div id="q8apgiu" class="page-right twoColRt"><div id="qfhj2xt" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8npwy88" class="recomPic likePro"><a 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