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class="twoCol"><div id="38jdfcr" class="page-proshow clearfix"><p class="current"> 當前位置:<a href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應</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/">接入設備</a>?山西烽火10/100M自適應以太網(wǎng)板卡深圳市騰云科創(chuàng)供應</p><div id="8ykhjvm" class="leftbox clearfix"><h1>山西烽火10/100M自適應以太網(wǎng)板卡深圳市騰云科創(chuàng)供應</h1><div id="lax3pwt" class="proBig"><div id="mliv2gy" 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="77htqs8" 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="jikceli" 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>山西烽火10/100M自適應以太網(wǎng)板卡,烽火</p><p><span>***更新：</span>2020-07-26 19:17:27</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="84szgip" 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="gqn3qct" class="page-proshow02"><p class="title">詳細說明</p><div id="au24ikw" class="box"><p><p> 二纖雙向復用段保護環(huán)將每根光纖的前一半時隙傳送主用業(yè)務，山西烽火10/100M自適應以太網(wǎng)板卡，后一半時隙傳送額外業(yè)務，也就是說一根光纖的保護時隙用來保護另一根光纖上的主用業(yè)務。業(yè)務容量為四纖雙向復用段保護環(huán)的1/2，即M/2（STM-N），其中M是節(jié)點數(shù)。它在組網(wǎng)中使用得較多，主要用于622M和2.5G系統(tǒng)，也是適用于業(yè)務分散的網(wǎng)絡。 </p> <p> 二纖單向通道保護環(huán)和二纖雙向復用段保護環(huán)的比較 </p> <p> 業(yè)務容量（*考慮主用業(yè)務） </p> <p> 單向通道保護環(huán)的比較大業(yè)務容量是STM-N，山西烽火10/100M自適應以太網(wǎng)板卡，二纖雙向復用段保護環(huán)的業(yè)務容量為M/2 ×STM-N（M是環(huán)上節(jié)點數(shù)）。 </p> <p> 復雜性 </p> <p> 二纖單向通道保護環(huán)，無論從實現(xiàn)控制的復雜性，還是設備的開發(fā)和制作難度來說，都是各種倒換環(huán)中**簡單的，山西烽火10/100M自適應以太網(wǎng)板卡。由于它不涉及APS的協(xié)議處理過程，因而業(yè)務倒換時間也**短。二纖雙向復用段保護環(huán)的控制邏輯和設備開發(fā)制作則是各種倒換環(huán)中**復雜的。 </p> <p> 兼容性真正的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）。山西烽火10/100M自適應以太網(wǎng)板卡</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西烽火10/100M自適應以太網(wǎng)板卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg"></div><p> STM-N信號幀的重復頻率（也就是每秒傳送的幀數(shù)）是多少呢？ITU-T規(guī)定對于任何級別的STM-N幀，幀頻都是8000幀/秒，也就是幀的周期為恒定的125μs ，幀中每個字節(jié)提供的通道速率是64Kbit/s。 </p> <p> <br /> </p> <p> 由于幀周期的恒定使STM-N信號的速率有其規(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信號速率≠E1信號速率的4倍。 </p> <p> STM-N信號幀的重復頻率（也就是每秒傳送的幀數(shù)）是多少呢？ITU-T規(guī)定對于任何級別的STM-N幀，幀頻都是8000幀/秒，也就是幀的周期為恒定的125μs ，幀中每個字節(jié)提供的通道速率是64Kbit/s。 </p> <p> <br /> </p> <p> 由于幀周期的恒定使STM-N信號的速率有其規(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信號速率≠E1信號速率的4倍。閔行區(qū)烽火780BSDH有傳輸和交換的性能，它的系列設備的構(gòu)成能通過功能塊的自由組合。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西烽火10/100M自適應以太網(wǎng)板卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847651777344/7289118.jpg"></div><p> SDH的應用 </p> <p> 由于以上所述的SDH的眾多特性，使其在廣域網(wǎng)領域和**網(wǎng)領域得到了巨大的發(fā)展。中國移動、電信、聯(lián)通、廣電等電信運營商都已經(jīng)大規(guī)模建設了基于SDH的骨干光傳輸網(wǎng)絡。利用大容量的SDH環(huán)路承載IP業(yè)務、ATM業(yè)務或直接以租用電路的方式出租給企、事業(yè)單位。而一些大型的**網(wǎng)絡也采用了SDH技術(shù)，架設系統(tǒng)內(nèi)部的SDH光環(huán)路，以承載各種業(yè)務。比如電力系統(tǒng)，就利用SDH環(huán)路承載內(nèi)部的數(shù)據(jù)、遠控、視頻、語音等業(yè)務。 </p> <p> 而對于組網(wǎng)更加迫切、而又沒有可能架設**SDH環(huán)路的單位，很多都采用了租用電信運營商電路的方式。由于SDH基于物理層的特點，單位可在租用電路上承載各種業(yè)務而不受傳輸?shù)南拗?。承載方式有很多種，可以是利用基于TDM技術(shù)的綜合復用設備實現(xiàn)多業(yè)務的復用，也可以利用基于IP的設備實現(xiàn)多業(yè)務的分組交換。SDH技術(shù)可真正實現(xiàn)租用電路的帶寬保證，安全性方面也優(yōu)于VPN等方式。在****和對安全性非常注重的企業(yè)，SDH租用線路得到了***的應用。一般來說，SDH可提供E1、E3、STM-1或STM-4等接口，完全可以滿足各種帶寬要求。同時在價格方面，也已經(jīng)為大部分單位所接受。 </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*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、不同廠商設備間的互通等多項功能，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，受到人們的***重視。 </p> <p> <br /> SDH網(wǎng)是由SDH網(wǎng)元設備通過光纜互連而成的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="山西烽火10/100M自適應以太網(wǎng)板卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg"></div><p> <p> 二纖單向通道保護環(huán)，無論從實現(xiàn)控制的復雜性，還是設備的開發(fā)和制作難度來說，都是各種倒換環(huán)中**簡單的。由于它不涉及APS的協(xié)議處理過程，因而業(yè)務倒換時間也**短。二纖雙向復用段保護環(huán)的控制邏輯和設備開發(fā)制作則是各種倒換環(huán)中**復雜的。 </p> <p> 兼容性 </p> <p> 二纖單向通道保護環(huán)*使用已經(jīng)完全預定好了的規(guī)則，由通道AIS信號來觸發(fā)倒換，與現(xiàn)行SDH標準完全相容，因而也容易滿足多廠家產(chǎn)品兼容性要求。 </p> <p> 二纖雙向復用段保護環(huán)使用APS協(xié)議控制倒換，而APS協(xié)議尚未標準化，所以復用段倒換環(huán)目前都不能滿足多廠家產(chǎn)品兼容性的要求。 </p> </p> <p> <br /> 段，相當于一條大的傳輸通道。湖北烽火STM-1</p><p style="text-indent:25px">標準的開放型光接口可以在基本光纜段上實現(xiàn)橫向兼容，降低了聯(lián)網(wǎng)成本。山西烽火10/100M自適應以太網(wǎng)板卡</p><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 /> 山西烽火10/100M自適應以太網(wǎng)板卡</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司屬于通信產(chǎn)品的高新企業(yè)，技術(shù)力量雄厚。騰云科創(chuàng)是一家有限責任公司企業(yè)，一直貫徹“以人為本，服務于社會”的經(jīng)營理念;“質(zhì)量高速，誠守信譽，持續(xù)發(fā)展”的質(zhì)量方針。以滿足顧客要求為己任；以顧客永遠滿意為標準；以保持行業(yè)**為目標，提供***的[ "SDH光傳輸設備", "光端機", "PCM接入設備", "PTN OTN光傳輸設備" ]。騰云科創(chuàng)順應時代發(fā)展和市場需求，通過**技術(shù)，力圖保證高規(guī)格高質(zhì)量的[ "SDH光傳輸設備", "光端機", "PCM接入設備", "PTN OTN光傳輸設備" ]。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/709793.html</p></div></div></div></div></div><div id="gf8x7gx" class="page-right twoColRt"><div id="uyqct3u" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8zaxzgn" 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="v3vxpw3" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/846569.html"><div><img src="https://tyunfile.71360.com/WaterMark/UploadFile/nbzxsw/637298235378037109/764794.png" alt="寧波寧海直接考A2有幾個科目真誠推薦寧波助學商務信息咨詢供應" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>寧波寧海直接考A2有幾個科目真誠推薦寧波助學商務信息咨詢供應</p></a></div><div id="3mia77z" class="recomPic 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