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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="bewy73q" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1,烽火</p><p><span>***更新：</span>2020-10-10 11:04:23</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="g2la2tu" 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(xún)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(huà): </span>16625147809</p><p><span>傳真: </span>1550_</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </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(hào)幸福家園A棟、B棟、C棟、D棟D棟110D</p><p>[當(dāng)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="enk2gxm" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="222ho3t" class="box"><p><p> 基本的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu) </p> <p> SDH網(wǎng)是由SDH網(wǎng)元設(shè)備通過(guò)光纜互連而成的，網(wǎng)絡(luò)節(jié)點(diǎn)設(shè)備（網(wǎng)元）和傳輸線路的幾何排列就構(gòu)成了網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)。網(wǎng)絡(luò)的有效性，湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1、可靠性和經(jīng)濟(jì)性在很大程度上與其拓?fù)浣Y(jié)構(gòu)有關(guān)。 </p> <p> 網(wǎng)絡(luò)拓?fù)涞幕窘Y(jié)構(gòu)有鏈形、星形、樹(shù)形、環(huán)形和網(wǎng)孔形。 </p> <p> 鏈形網(wǎng) </p> <p> 鏈形網(wǎng)絡(luò)拓?fù)涫菍⒕W(wǎng)中的所有節(jié)點(diǎn)一一串聯(lián)，而首尾兩端開(kāi)放。這種拓?fù)涞奶攸c(diǎn)是較經(jīng)濟(jì)，在SDH網(wǎng)的早期用得較多，主要用于專(zhuān)網(wǎng)如鐵路網(wǎng)中，湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1。 </p> <p> 星形網(wǎng) </p> <p> 星形網(wǎng)絡(luò)拓?fù)涫菍⒕W(wǎng)中一網(wǎng)元做為中心節(jié)點(diǎn)設(shè)備與其他各網(wǎng)元節(jié)點(diǎn)相連，其他各網(wǎng)元節(jié)點(diǎn)之間互不相連，湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1，網(wǎng)元節(jié)點(diǎn)的業(yè)務(wù)都要經(jīng)過(guò)這個(gè)特殊節(jié)點(diǎn)轉(zhuǎn)接。 </p> <p> <br /> </p> <p> <br /> 環(huán)形網(wǎng)拓?fù)鋵?shí)際上是指將鏈形拓?fù)涫孜蚕噙B。湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div><p> SDH的發(fā)展趨勢(shì) </p> <p> SDH作為新一代理想的傳輸體系，具有路由自動(dòng)選擇能力，上下電路方便，維護(hù)、控制、管理功能強(qiáng)，標(biāo)準(zhǔn)統(tǒng)一，便于傳輸更高速率的業(yè)務(wù)等優(yōu)點(diǎn)，能很好地適應(yīng)通信網(wǎng)飛速發(fā)展的需要。迄今，SDH得到了空前的應(yīng)用與發(fā)展。在標(biāo)準(zhǔn)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(zhǎng)途網(wǎng)、中繼網(wǎng)、接入網(wǎng)中它開(kāi)始廣泛應(yīng)用。且在光纖通信、微波通信、衛(wèi)星通信中也積極地開(kāi)展研究與應(yīng)用。 </p> <p> <p> 近些年，點(diǎn)播電視、多媒體業(yè)務(wù)和其他寬帶業(yè)務(wù)如雨后春筍般紛紛出現(xiàn)，為SDH應(yīng)用在接入網(wǎng)中提供了廣闊的空間。SDH技術(shù)應(yīng)用于接入網(wǎng)的好處是：1）對(duì)于要求高可靠、高質(zhì)量業(yè)務(wù)的大型企事業(yè)用戶(hù)，SDH可以提供較為理想的網(wǎng)絡(luò)性能和業(yè)務(wù)可靠性。2）可以將網(wǎng)管范圍擴(kuò)展至用戶(hù)端，簡(jiǎn)化維護(hù)工作。3）利用SDH固有靈活性，可使網(wǎng)絡(luò)運(yùn)營(yíng)者更快、更有效地提供用戶(hù)所需的長(zhǎng)期和短期業(yè)務(wù)需求。 </p> <p> <br /> </p> <p> <br /> </p> <p> <br /> </p> 廣東光傳輸設(shè)備烽火RET段，相當(dāng)于一條大的傳輸通道。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101923829/7728521.jpg"></div><p style="text-indent:25px">根據(jù)電力通信點(diǎn)多面廣, 可靠性要求高的特點(diǎn), 主干傳輸網(wǎng)可采用光纖自愈環(huán)的網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu), 也可以采用雙環(huán)相切、多環(huán)相切的主干網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu), 采用相切環(huán)時(shí)可在兩環(huán)相切的節(jié)點(diǎn)上采用雙環(huán)網(wǎng)元設(shè)備交叉保護(hù), 克服雙環(huán)相切時(shí)節(jié)點(diǎn)保護(hù)可靠性差的問(wèn)題。支路可根據(jù)實(shí)際需要采用鏈形、星形、樹(shù)形等結(jié)構(gòu)。另外, 采用SDH 設(shè)備的光纖自愈環(huán)可實(shí)現(xiàn)多種形式的通道保護(hù), 而且SDH 光纖環(huán)有較強(qiáng)的自愈能力。所謂自愈就是指在網(wǎng)絡(luò)發(fā)生故障(例如光纖斷裂)時(shí), 無(wú)需人為干預(yù), 網(wǎng)絡(luò)能在極短的時(shí)間內(nèi)( ITU 2T規(guī)定為50ms 以?xún)?nèi)) 自動(dòng)恢復(fù)傳輸, 使用戶(hù)幾乎感覺(jué)不到網(wǎng)絡(luò)出了故障。傳統(tǒng)的組網(wǎng)概念中, 提高傳輸設(shè)備利用率是**關(guān)鍵的, 為了增加線路的占空系數(shù), 在每個(gè)節(jié)點(diǎn)都建立了許多直接通道, 致使網(wǎng)絡(luò)結(jié)構(gòu)非常復(fù)雜。而利用SDH組網(wǎng), 使用SDH提供的豐富的開(kāi)銷(xiāo)字節(jié), 就可以極大簡(jiǎn)化網(wǎng)絡(luò)結(jié)構(gòu), 實(shí)現(xiàn)強(qiáng)大的OAM功能, 降低傳輸費(fèi)用并支持新業(yè)務(wù)的發(fā)展, 這正符合了現(xiàn)代通信發(fā)展的目標(biāo)。</p><p> 同步數(shù)字系列（Synchronous Digital Hierarchy，縮寫(xiě)為SDH）是一種將復(fù)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(luò)，是美國(guó)貝爾通信技術(shù)研究所提出來(lái)的同步光網(wǎng)絡(luò)（SONET）。國(guó)際電話(huà)電報(bào)咨詢(xún)**會(huì)（CCITT）（現(xiàn)ITU-T）于1988年接受了SONET 概念并重新命名為SDH，這使其成為不*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(shí)現(xiàn)網(wǎng)絡(luò)有效管理、實(shí)時(shí)業(yè)務(wù)監(jiān)控、動(dòng)態(tài)網(wǎng)絡(luò)維護(hù)、不同廠商設(shè)備間的互通等多項(xiàng)功能，能**提高網(wǎng)絡(luò)資源利用率、降低管理及維護(hù)費(fèi)用、實(shí)現(xiàn)靈活可靠和***的網(wǎng)絡(luò)運(yùn)行與維護(hù)。 </p> <p> <br /> 由于SDH有多種網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu)，它所組成的網(wǎng)絡(luò)非常靈活。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105000000/3722756.jpg"></div><p> <p> <p> 從技術(shù)上來(lái)看，接入層的相對(duì)帶寬需求較小，需要提供IP、TDM，可能還有ATM等綜合業(yè)務(wù)傳送。以SDH 系統(tǒng)為基礎(chǔ)并能夠提供IP 、ATM 傳送與處理的系統(tǒng)（包括TDM、IP與ATM接口，甚至包括IP 和ATM 交換模塊）將是解決接入層傳送的主要方法，這種方式可廉價(jià)地在一個(gè)業(yè)務(wù)提供點(diǎn)（POP）上提供高質(zhì)量專(zhuān)線、ATM 、IP 等業(yè)務(wù)的接入、傳送和保護(hù)。 </p> <p> 隨著骨干傳輸容量不斷增大，城域傳輸網(wǎng)絡(luò)的接入能力也多樣化。但以IP為主的網(wǎng)絡(luò)業(yè)務(wù)仍然是不可預(yù)知的，這需要傳輸網(wǎng)絡(luò)具有更好的自適應(yīng)能力，而這種自適應(yīng)能力不**是網(wǎng)絡(luò)接口或網(wǎng)絡(luò)容量的適應(yīng)能力，而且要求網(wǎng)絡(luò)連接的自適應(yīng)能力。總的來(lái)說(shuō)，低成本、靈活快速的完成運(yùn)營(yíng)商端局到用戶(hù)端的業(yè)務(wù)接入和業(yè)務(wù)收斂是對(duì)未來(lái)城域網(wǎng)接入系統(tǒng)的主要需求。 </p> </p> <p> <br /> </p> </p> <p> <br /> 網(wǎng)絡(luò)節(jié)點(diǎn)設(shè)備（網(wǎng)元）和傳輸線路的幾何排列就構(gòu)成了網(wǎng)絡(luò)的拓?fù)浣Y(jié)構(gòu)。重慶光傳輸設(shè)備價(jià)格烽火IBAS 180</p><p style="text-indent:25px">但是由于系統(tǒng)的冗余度高，必會(huì)使系統(tǒng)有效性降低，成本高且結(jié)構(gòu)復(fù)雜。湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1</p><p> 樹(shù)形網(wǎng) </p> <p> <br /> </p> <p> 樹(shù)形網(wǎng)絡(luò)拓?fù)淇煽闯墒擎溞瓮負(fù)浜托切瓮負(fù)涞慕Y(jié)合。 </p> <p> <br /> </p> <p> 環(huán)形網(wǎng) </p> <p> <br /> </p> <p> 環(huán)形網(wǎng)拓?fù)鋵?shí)際上是指將鏈形拓?fù)涫孜蚕噙B，從而使網(wǎng)上任何一個(gè)網(wǎng)元節(jié)點(diǎn)都不對(duì)外開(kāi)放的網(wǎng)絡(luò)拓?fù)湫问?。這是當(dāng)前使用**多的網(wǎng)絡(luò)拓?fù)湫问?，主要是因?yàn)樗哂泻軓?qiáng)的生存性，即自愈功能較強(qiáng)。 </p> <p> <br /> </p> <p> 網(wǎng)孔形網(wǎng) </p> <p> <br /> </p> <p> 將所有網(wǎng)元節(jié)點(diǎn)兩兩相連，就形成了網(wǎng)孔形網(wǎng)絡(luò)。這種網(wǎng)絡(luò)拓?fù)錇閮删W(wǎng)元節(jié)點(diǎn)間提供多個(gè)傳輸路由，使網(wǎng)絡(luò)的可靠更強(qiáng)。但是由于系統(tǒng)的冗余度高，必會(huì)使系統(tǒng)有效性降低，成本高且結(jié)構(gòu)復(fù)雜。 </p> <p> <br /> </p> <p> 當(dāng)前用得**多的網(wǎng)絡(luò)拓?fù)涫擎溞魏铜h(huán)形，通過(guò)它們的靈活組合，可構(gòu)成更加復(fù)雜的網(wǎng)絡(luò)。湖北銷(xiāo)售光傳輸設(shè)備烽火STM-1</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢(xún)有限公司主要經(jīng)營(yíng)范圍是通信產(chǎn)品，擁有一支專(zhuān)業(yè)技術(shù)團(tuán)隊(duì)和良好的市場(chǎng)口碑。騰云科創(chuàng)致力于為客戶(hù)提供良好的SDH光傳輸設(shè)備，光端機(jī)，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備，一切以用戶(hù)需求為中心，深受廣大客戶(hù)的歡迎。公司秉持誠(chéng)信為本的經(jīng)營(yíng)理念，在通信產(chǎn)品深耕多年，以技術(shù)為先導(dǎo)，以自主產(chǎn)品為重點(diǎn)，發(fā)揮人才優(yōu)勢(shì)，打造通信產(chǎn)品良好品牌。騰云科創(chuàng)秉承“客戶(hù)為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營(yíng)理念，全力打造公司的重點(diǎn)競(jìng)爭(zhēng)力。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/1496877.html</p></div></div></div></div></div><div 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