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id="fjkhofr" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/4175838.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="gfmd8dp" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/4175838.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="ncwp8mi" 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>四川代理光傳輸設(shè)備烽火NMU,烽火</p><p><span>***更新：</span>2020-09-22 04:08:08</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="g7khyub" 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(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="23mtv8j" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="j2n3hzl" class="box"><p><p> SDH網(wǎng)絡(luò)的常見(jiàn)網(wǎng)元和功能 </p> <p> ADM——分/插復(fù)用器 </p> <p> 分/插復(fù)用器用于SDH傳輸網(wǎng)絡(luò)的轉(zhuǎn)接站點(diǎn)處，例如鏈的中間結(jié)點(diǎn)或環(huán)上結(jié)點(diǎn)，是SDH網(wǎng)上使用**多、**重要的一種網(wǎng)元，它是一個(gè)三端口的器件。 </p> <p> ADM有兩個(gè)線路端口和一個(gè)支路端口。兩個(gè)線路端口各接一側(cè)的光纜（每側(cè)收/發(fā)共兩根光纖），為了描述方便我們將其分為西（W）向、東向（E）兩個(gè)線路端口，四川代理光傳輸設(shè)備烽火NMU。ADM的作用是將低速支路信號(hào)交叉復(fù)用進(jìn)東或西向線路上去，或從東或西側(cè)線路端口收的線路信號(hào)中拆分出低速支路信號(hào)。另外，還可將東/西向線路側(cè)的STM-N信號(hào)進(jìn)行交叉連接，例如將東向STM-16中的3#STM-1與西向STM-16中的15#STM-1相連接。 </p> <p> ADM是SDH**重要的一種網(wǎng)元，通過(guò)它可等效成其它網(wǎng)元，四川代理光傳輸設(shè)備烽火NMU，即能完成其它網(wǎng)元的功能，四川代理光傳輸設(shè)備烽火NMU，例如：一個(gè)ADM可等效成兩個(gè)TM。管理單元指針位于STM-N幀中第4行的***到第9×N列。四川代理光傳輸設(shè)備烽火NMU</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川代理光傳輸設(shè)備烽火NMU,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845101689454/4175838.jpg"></div><p> 傳輸網(wǎng)上的業(yè)務(wù)按流向可分為單向業(yè)務(wù)和雙向業(yè)務(wù)。以環(huán)網(wǎng)為例說(shuō)明單向業(yè)務(wù)和雙向業(yè)務(wù)的區(qū)別。 </p> <p> <br /> </p> <p> 若A和C之間互通業(yè)務(wù)，A到C的業(yè)務(wù)路由假定是A→B→C，若此時(shí)C到A的業(yè)務(wù)路由是C→B→A，則業(yè)務(wù)從A到C和從C到A的路由相同，稱(chēng)為一致路由。 </p> <p> 若此時(shí)C到A的路由是C→D→A，那么業(yè)務(wù)從A到C和業(yè)務(wù)從C到A的路由不同，稱(chēng)為分離路由。 </p> <p> 我們稱(chēng)一致路由的業(yè)務(wù)為雙向業(yè)務(wù)，分離路由的業(yè)務(wù)為單向業(yè)務(wù)。常見(jiàn)組網(wǎng)的業(yè)務(wù)方向和路由。 </p> <p> 深圳市騰云科創(chuàng)信息咨詢有限公司以質(zhì)量的服務(wù)、良好的信譽(yù)、雄厚的技術(shù)力量為廣大客戶提供質(zhì)量服務(wù)。我司供應(yīng)中興ZXMP系列產(chǎn)品：ZXMP S200｜ZXMP S320｜ZXMP S330｜ZXMP S325｜ZXMP S385｜ZXMP S390整機(jī)及各型號(hào)單板。供應(yīng)華為Metro系列產(chǎn)品：Metro1000｜Metro2050｜Metro3000｜Optix2500+｜Metro5000整機(jī)及各型號(hào)單板。供應(yīng)華為OSN系列產(chǎn)品：OSN1500B｜OSN2000｜OSN2500｜OSN3500｜OSN7500整機(jī)及各型號(hào)單板。供應(yīng)烽火IBAS系列產(chǎn)品： IBAS780A｜IBAS780B供應(yīng)PCM綜合接入設(shè)備：FA16接入設(shè)備｜BX10接入設(shè)備。努力奉獻(xiàn)，您的滿意是我們一直的追求！重慶SDH設(shè)備烽火ASON 780A例如一條鏈的兩個(gè)端點(diǎn)上，它是一個(gè)雙端口器件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川代理光傳輸設(shè)備烽火NMU,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847724550782/6753357.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 以內(nèi)) 自動(dòng)恢復(fù)傳輸, 使用戶幾乎感覺(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> 電力通信**網(wǎng)的構(gòu)建思路 </p> <p> 電力通信網(wǎng)可以在樞紐節(jié)點(diǎn)、大型變電站、行政中心采用標(biāo)準(zhǔn)的STM 21、STM 24 或STM 216 傳輸設(shè)備疊加接入模塊的方式; 在中小型變電站、鄉(xiāng)鎮(zhèn)供電所等業(yè)務(wù)量較少的節(jié)點(diǎn)采用單獨(dú)簡(jiǎn)單配置的STM-21網(wǎng)元設(shè)備組網(wǎng)或STM-21網(wǎng)元設(shè)備疊加接入模塊的方式; 接入模塊解決話音、V. 24/V. 35、2W/4W、E&M 等窄帶業(yè)務(wù)接入, 而10Mb/s、100Mb/s等寬帶數(shù)據(jù)接入則在SDH傳輸平臺(tái)上提供,這樣能夠充分保證帶寬和服務(wù)質(zhì)量(QoS)。環(huán)網(wǎng)光纜建設(shè)綜合考慮通信、計(jì)算機(jī)網(wǎng)絡(luò)及有線電視傳輸?shù)男枰?采用不等芯數(shù)配置, 做到既滿足要求, 又節(jié)省投資?？紤]到全網(wǎng)的性能價(jià)格比, 比較好采用系列化較完整的產(chǎn)品, 對(duì)不同節(jié)點(diǎn)選用不同配置的網(wǎng)元設(shè)備, 并能進(jìn)行統(tǒng)一網(wǎng)管, 以實(shí)現(xiàn)有效的分層管理, 便于故障快速定位, 從而有效減輕維護(hù)工作量。隨著網(wǎng)絡(luò)規(guī)模的擴(kuò)大, 應(yīng)實(shí)現(xiàn)多廠家的設(shè)備管理, 要求網(wǎng)管支持標(biāo)準(zhǔn)接口, 即網(wǎng)管系統(tǒng)具備開(kāi)放性。 </p> <p> 通過(guò)基于SDH 的MSTP, 可支持全業(yè)務(wù), 局域網(wǎng)互聯(lián)帶寬可按VC212×N (1～ 48) 平滑設(shè)置, 可利用SDH 層的網(wǎng)絡(luò)自愈功能實(shí)現(xiàn)電信級(jí)的保護(hù), 統(tǒng)一的網(wǎng)管方便網(wǎng)絡(luò)維護(hù)。它完善地解決所有業(yè)務(wù)信號(hào)的接入和傳輸, 且相對(duì)于其它的組網(wǎng)方式具有其明顯的優(yōu)勢(shì)。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="四川代理光傳輸設(shè)備烽火NMU,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845105136719/8556415.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> <br /> 電力系統(tǒng)一旦發(fā)生故障, 如果通信不暢, 不能及時(shí)調(diào)度指揮,就會(huì)擴(kuò)大***范圍。西藏光傳輸設(shè)備烽火ASON 780B</p><p style="text-indent:25px">SDH有傳輸和交換的性能，它的系列設(shè)備的構(gòu)成能通過(guò)功能塊的自由組合。四川代理光傳輸設(shè)備烽火NMU</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、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。 </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，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 /> 四川代理光傳輸設(shè)備烽火NMU</p><p style="text-indent:25px">深圳市騰云科創(chuàng)信息咨詢有限公司主要經(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，一切以用戶需求為中心，深受廣大客戶的歡迎。公司注重以質(zhì)量為中心，以服務(wù)為理念，秉持誠(chéng)信為本的理念，打造通信產(chǎn)品良好品牌。在社會(huì)各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務(wù)體驗(yàn)，為客戶成功提供堅(jiān)實(shí)有力的支持。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/1373973.html</p></div></div></div></div></div><div id="knprtk2" class="page-right twoColRt"><div id="ycokwxj" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="dlikctk" 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(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="hvmykb7" 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" 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