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href="http://m.cdcfah.com/">首頁?<a href="http://m.cdcfah.com/cp/">產品供應</a>?<a href="http://m.cdcfah.com/cp/second-_txcp/">通信產品</a>?<a href="http://m.cdcfah.com/cp/third-txcp_jrsbtn/">接入設備</a>?甘肅銷售光傳輸設備烽火ASON 780B 深圳市騰云科創(chuàng)供應</p><div id="jogdfwa" class="leftbox clearfix"><h1>甘肅銷售光傳輸設備烽火ASON 780B 深圳市騰云科創(chuàng)供應</h1><div id="wqcj2jv" class="proBig"><div id="8t8ikry" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="lvse2wd" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="o28iuwy" class="content"><p><span>需求數量：</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>產品關鍵詞：</span>甘肅銷售光傳輸設備烽火ASON 780B,烽火</p><p><span>***更新：</span>2020-12-19 01:06:59</p><p><span id="click" >瀏覽次數：0次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="otqsubi" 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="gf2wya7" class="page-proshow02"><p class="title">詳細說明</p><div id="zc9m8zw" class="box"><p><p> 同步數字系列（Synchronous Digital Hierarchy，縮寫為SDH）是一種將復接、線路傳輸及交換功能融為一體、并由統(tǒng)一網管系統(tǒng)操作的綜合信息傳送網絡，是美國貝爾通信技術研究所提出來的同步光網絡（SONET）。國際電話電報咨詢**會（CCITT）（現ITU-T）于1988年接受了SONET 概念并重新命名為SDH，這使其成為不僅適用于光纖也適用于微波和衛(wèi)星傳輸的通用技術體制。它可實現網絡有效管理、實時業(yè)務監(jiān)控、動態(tài)網絡維護、不同廠商設備間的互通等多項功能，甘肅銷售光傳輸設備烽火ASON 780B，甘肅銷售光傳輸設備烽火ASON 780B，能**提高網絡資源利用率、降低管理及維護費用、實現靈活可靠和***的網絡運行與維護，甘肅銷售光傳輸設備烽火ASON 780B。 </p> <p> <br /> 網絡的有效性、可靠性和經濟性在很大程度上與其拓撲結構有關。甘肅銷售光傳輸設備烽火ASON 780B</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅銷售光傳輸設備烽火ASON 780B,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg"></div><p> SDH的特點 </p> <p> SDH是數字傳輸體制上繼PDH之后的一次劃時代的飛躍。SDH之所以能夠快速發(fā)展這是與它自身的特點是分不開的，其具體特點如下： </p> <p> （1）SDH傳輸系統(tǒng)在國際上有統(tǒng)一的幀結構，數字傳輸標準速率和標準的光路接口，使網管系統(tǒng)互通，因此有很好的橫向兼容性，它能與現有的PDH完全兼容，并容納各種新的業(yè)務信號，形成了全球統(tǒng)一的數字傳輸體制標準，提高了網絡的可靠性； </p> <p> （2）SDH接入系統(tǒng)的不同等級的碼流在幀結構凈負荷區(qū)內的排列非常有規(guī)律，而凈負荷與網絡是同步的，它利用軟件能將高速信號一次直接分插出低速支路信號，實現了一次復用的特性，克服了PDH準同步復用方式對全部高速信號進行逐級分解然后再生復用的過程，由于**簡化了DXC，減少了背靠背的接口復用設備，改善了網絡的業(yè)務傳送透明性； </p> <p> （3）由于采用了較先進的分插復用器（ADM）、數字交叉連接（DXC）、網絡的自愈功能和重組功能就顯得非常強大，具有較強的生存率。因SDH幀結構中安排了信號的5％開銷比特，它的網管功能顯得特別強大，并能統(tǒng)一形成網絡管理系統(tǒng)，為網絡的自動化、智能化、信道的利用率以及降低網絡的維管費和生存能力起到了積極作用；西藏光傳輸設備烽火NMU由于采用了較先進的分插復用器（ADM）、數字交叉連接（DXC）。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅銷售光傳輸設備烽火ASON 780B,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847797656250/1749392.jpg"></div><p> 保護倒換系統(tǒng) </p> <p> 目前環(huán)形網絡的拓撲結構用得**多，因為環(huán)形網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、網元節(jié)點間光纖數來劃分。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；按網元節(jié)點間的光纖數可將自愈環(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)務級別可將自愈環(huán)劃分為通道保護環(huán)和復用段保護環(huán)兩大類。 </p> <p> <br /> </p> <p> SDH通信網具有保護機制實現網絡的自愈，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，由于人為因素或設備故障，一旦發(fā)生業(yè)務中斷，尤其是傳輸繼電保護信號的網絡發(fā)生故障，造成的巨大損失無法估計。SDH設備的保護方式應符合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)采用二纖雙向復用段保護方式，當線路出現故障時可通過傳輸系統(tǒng)的保護倒換機制，使業(yè)務迅速恢復(保護倒換時間在50rIls以內)。在二纖雙向復用段保護環(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)務流向相反。 </p> <p> <br /> </p><p> 在各種寬帶光纖接入網技術中，采用了SDH技術的接入網系統(tǒng)是應用**普遍的。SDH的誕生解決了由于入戶媒質的帶寬限制而跟不上骨干網和用戶業(yè)務需求的發(fā)展,而產生了用戶與**網之間的接入"瓶頸"的問題，同時提高了傳輸網上大量帶寬的利用率。SDH技術自從90年代引入以來，至今已經是一種成熟、標準的技術，在骨干網中被***采用，且價格越來越低，在接入網中應用可以將SDH技術在**網中的巨大帶寬優(yōu)勢和技術優(yōu)勢帶入接入網領域，充分利用SDH同步復用、標準化的光接口、強大的網管能力、靈活網絡拓撲能力和高可靠性帶來好處，在接入網的建設發(fā)展中長期受益。 </p> <p> <br /> </p> <p> <br /> 同時也使網絡運行靈活、安全、可靠，使網絡的功能非常齊全和多樣化；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="甘肅銷售光傳輸設備烽火ASON 780B,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div><p> 電力網的發(fā)展對電力系統(tǒng)**通信網提出了更高的要求, 電力通信要求確保電能的生產、輸送、分配、消費在瞬間是同時完成的。為了保證電網安全、經濟地運行, 必須配置調度、保護、遠程控制等系統(tǒng)。這些系統(tǒng)的所有信息傳輸都必須由通信系統(tǒng)提供通道。由此可見, 通信在電力系統(tǒng)中的作用是非常關鍵的。隨著經濟的發(fā)展, 電力系統(tǒng)容量急劇增加, 隨之而來的是輸電超高壓化, 接入業(yè)務多樣化。 </p> <p> 電力系統(tǒng)一旦發(fā)生故障, 如果通信不暢, 不能及時調度指揮,就會擴大***范圍, 造成大面積停電甚至系統(tǒng)瓦解,不僅經濟損失十分慘重, 而且會給社會造成嚴重影響。因此電力系統(tǒng)的通信要有非常高的可靠性。由于SDH技術具有特有的優(yōu)勢, 采用SDH技術組網不僅適合現代通信發(fā)展的需要,而且特別適合電力系統(tǒng)通信的需要。SDH網是由不同類型的SDH網元設備, 如終端復用設備(TM )、再生器(REG)、分插復用設備(ADM )、數字交叉連接(DXC) 設備等, 通過光纜互連而成的, 由這些網元設備完成SDH 網的上下業(yè)務、交叉連接業(yè)務、網絡故障自愈等傳送功能。SDH網的網絡節(jié)點(網元) 和傳輸線路的幾何排列就構成了網絡的拓撲結構。網絡的基本拓撲結構大致有這樣幾種方式: 鏈形、星形、樹形、環(huán)形和網格形等。由于SDH有多種網絡拓撲結構，它所組成的網絡非常靈活。西藏光傳輸設備烽火NMU</p><p style="text-indent:25px">SDH是數字傳輸體制上繼PDH之后的一次劃時代的飛躍。甘肅銷售光傳輸設備烽火ASON 780B</p><p> 深圳市騰云科創(chuàng)信息咨詢有限公司 SDH的特點 </p> <p> （1）由于SDH多種網絡拓撲結構，它所組成的網絡非常靈活，它能增強網監(jiān)，運行管理和自動配置功能，優(yōu)化了網絡性能有，同時也使網絡運行靈活、安全、可靠，使網絡的功能非常齊全和多樣化； </p> <p> （2）SDH有傳輸和交換的性能它的系列設備的構成能通過功能塊的自由組合，實現了不同層次和各種拓撲結構的網絡，十分靈活； </p> <p> （3）SDH并不專屬于某種傳輸介質，它可用于雙絞線、同軸電纜，但SDH用于傳輸高數據率則需用光纖。這一特點表明，SDH既適合用作干線通道，也可作支線通道。例如，我國的國家與省級有線電視干線網就是采用SDH，而且它也便于與光纖電纜混合網(HFC)相兼容。 </p> <p> （4）從OSI模型的觀點來看，SDH屬于其比較低層的物理層，并未對其高層有嚴格的限制，便于在SDH上采用各種網絡技術，支持ATM或IP傳輸； </p> <p> （5）SDH是嚴格同步的，從而保證了整個網絡穩(wěn)定可靠，誤碼少，且便于復用和調整； </p> <p> （6）標準的開放型光接口 </p> <p> 可以在基本光纜段上實現橫向兼容，降低了聯網成本。甘肅銷售光傳輸設備烽火ASON 780B</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司致力于通信產品，以科技創(chuàng)新實現***管理的追求。騰云科創(chuàng)擁有一支經驗豐富、技術創(chuàng)新的專業(yè)研發(fā)團隊，以高度的專注和執(zhí)著為客戶提供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)始終以本分踏實的精神和必勝的信念，影響并帶動團隊取得成功。騰云科創(chuàng)始終關注通信產品市場，以敏銳的市場洞察力，實現與客戶的成長共贏。</p></p><br /><p>文章來源地址: http://m.cdcfah.com/cp/2461013.html</p></div></div></div></div></div><div id="ib98wfb" class="page-right twoColRt"><div id="ga92zg7" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="edctawy" 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 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