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href="http://m.cdcfah.com/zh/"><span>展會信息</span></a></li></ul></div></nav><section class="wrap clearfix"><section class="container clearfix tcPro"><section class="home-main container clearfix"><div id="0tfro3l" class="twoCol"><div id="yszrtsj" 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(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>?青浦區(qū)烽火STM-16 深圳市騰云科創(chuàng)供應(yīng)「深圳市騰云科創(chuàng)供應(yīng)」</p><div id="kumj7fx" class="leftbox clearfix"><h1>青浦區(qū)烽火STM-16 深圳市騰云科創(chuàng)供應(yīng)「深圳市騰云科創(chuàng)供應(yīng)」</h1><div id="yifxels" class="proBig"><div id="oyaskwy" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8nfhjgy" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3wyqh8m" 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>青浦區(qū)烽火STM-16</p><p><span>***更新：</span>2020-07-15 11:49:14</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="gvs742q" 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="uj7egn7" class="page-proshow02"><p class="title">詳細說明</p><div id="icztv7m" class="box"><p><p><p> 保護倒換系統(tǒng) </p> <p> 目前環(huán)形網(wǎng)絡(luò)的拓撲結(jié)構(gòu)用得**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(wù)級別、環(huán)上業(yè)務(wù)的方向、網(wǎng)元節(jié)點間光纖數(shù)來劃分。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)點間的光纖數(shù)可將自愈環(huán)劃分為雙纖環(huán)(一對收／發(fā)光纖)和四纖環(huán)(兩對收發(fā)光纖)；按保護的業(yè)務(wù)級別可將自愈環(huán)劃分為通道保護環(huán)和復(fù)用段保護環(huán)兩大類。 </p> <p> <br /> </p> <p> SDH通信網(wǎng)具有保護機制實現(xiàn)網(wǎng)絡(luò)的自愈，在發(fā)生短暫失效時會自動切換到保護通道，而不需要人工切換。然而，由于人為因素或設(shè)備故障，一旦發(fā)生業(yè)務(wù)中斷，尤其是傳輸繼電保護信號的網(wǎng)絡(luò)發(fā)生故障，造成的巨大損失無法估計。SDH設(shè)備的保護方式應(yīng)符合ITU.T建議G．841規(guī)范及將來的G.SHR建議要求。 </p> <p> <br /> </p> <p> 例如某地**環(huán)采用二纖雙向復(fù)用段保護方式，當線路出現(xiàn)故障時可通過傳輸系統(tǒng)的保護倒換機制，使業(yè)務(wù)迅速恢復(fù)(保護倒換時間在50rIls以內(nèi))。在二纖雙向復(fù)用段保護環(huán)上無專門的主、備用光纖，每一條光纖的前半個時隙是主用信道，后半個時隙是備信道，兩根光纖上業(yè)務(wù)流向相反。 </p> <p> <br /> </p></p><p><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/4175838.jpg" /></p><p>SDH網(wǎng)絡(luò)是整個數(shù)字網(wǎng)的一部分，它的定時基準應(yīng)是這個數(shù)字網(wǎng)的統(tǒng)一的定時基準。時鐘同步，就是使通信網(wǎng)內(nèi)所有節(jié)點的時鐘頻率和相位都控制在預(yù)先確定的容差范圍內(nèi)，確保網(wǎng)內(nèi)各傳輸或交換節(jié)點的全部數(shù)字流正確有效地傳輸或交換，時鐘不同步，會在緩沖器中產(chǎn)生信息比特的溢出或取空，導致數(shù)字流的滑動損傷，造成數(shù)據(jù)出錯，影響正常運行。電流差動保護的關(guān)鍵是線路兩側(cè)保護之間的電流數(shù)據(jù)交換，當復(fù)接數(shù)字通信設(shè)備時，同步時鐘的提取方式是一個非常重要的問題。本期新增節(jié)點均從線路側(cè)提取同步信號。</p><p><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg" /></p><p>深圳騰云科創(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，維護，產(chǎn)品維修，計算機系統(tǒng)集成施工。公司擁有專業(yè)的技術(shù)團隊，由廠家(中興通訊，華為技術(shù)，烽火通信)服務(wù)10年以上從業(yè)經(jīng)驗的技術(shù)****，并有多名專業(yè)技術(shù)人員為您提供專業(yè)的商務(wù)技術(shù)和專業(yè)解決方案。公司主營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。公司業(yè)務(wù)涉及交通、金融、教育、衛(wèi)生、科研等系統(tǒng)已經(jīng)建立了牢固的業(yè)務(wù)合作伙伴關(guān)系。積極面向市場為廣大行業(yè)用戶提供設(shè)計、安裝、調(diào)試、培訓、維護的“一條龍"服務(wù)。本公司以質(zhì)量的服務(wù)、良好的信譽、雄厚的技術(shù)力量為廣大客戶提供質(zhì)量服務(wù)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)烽火STM-16" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/601660.html</p></div></div></div></div></div><div id="akhz2q2" class="page-right twoColRt"><div id="q22fcjy" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="zjgdfmy" class="recomPic 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