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src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="dmetkgn" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="dm2am23" 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>廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火</p><p><span>***更新：</span>2021-01-30 02:06:37</p><p><span id="click" >瀏覽次數(shù)：4次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="2el4wdf" 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="zyvflpb" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="3c2ogdp" class="box"><p><p> SDH網(wǎng)絡(luò)的常見(jiàn)網(wǎng)元和功能 </p> <p> REG——再生中繼器 </p> <p> 光傳輸網(wǎng)的再生中繼器有兩種，一種是純光的再生中繼器，主要進(jìn)行光功率放大以延長(zhǎng)光傳輸距離；另一種是用于脈沖再生整形的電再生中繼器，主要通過(guò)光/電變換、電信號(hào)抽樣、判決、再生整形、電/光變換，以達(dá)到不積累線路噪聲，廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡，保證線路上傳送信號(hào)波形的完好性。此處講的是后一種再生中繼器，REG是雙端口器件，廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡，只有兩個(gè)線路端口——W，廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡、E。 </p> <p> 它的作用是將w/e側(cè)的光信號(hào)經(jīng)O/E、抽樣、判決、再生整形、E/O在e或w側(cè)發(fā)出。注意到?jīng)]有，REG與ADM相比*少了支路端口，所以ADM若本地不上/下話路（支路不上/下信號(hào)）時(shí)完全可以等效一個(gè)REG。 </p> <p> 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），而ADM和TM因?yàn)橐瓿蓪⒌退僦沸盘?hào)分/插到STM-N中，所以不*要處理RSOH，而且還要處理MSOH；另外ADM和TM都具有交叉復(fù)用能力（有交叉連接功能），因此用ADM來(lái)等效REG有點(diǎn)大材小用了。各種PDH支路信號(hào)復(fù)用進(jìn)STM-N幀的過(guò)程都要經(jīng)歷映射、定位、復(fù)用三個(gè)步驟。廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845102001954/2472236.jpg"></div><p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 電源系統(tǒng)SDH設(shè)備采用一48伏直流電源，工作電壓應(yīng)滿足：輸入電壓范圍是-40V至-57V；電話衡量雜音電壓<2mV；峰峰值雜音電壓(0．300Hz)_<400mV。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 根據(jù)公式：電流=功率／電壓。各設(shè)備正常工作時(shí)的比較大電流等于滿配置功耗除以工作電壓。比較大電流再加上適當(dāng)富余量取整可得所需熔絲大小。</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";"> 時(shí)鐘同步系統(tǒng)</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">SDH網(wǎng)元時(shí)鐘源的種類</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(1)外部時(shí)鐘源——由SETPI功能塊提供輸入接口；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(2)線路時(shí)鐘源一由SPI功能塊從STM．N線路信號(hào)中提取；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(3)支路時(shí)鐘源——由PPI功能塊從PDH支路信號(hào)中提取，不過(guò)該時(shí)鐘一般不用，因?yàn)镾DH／PDH網(wǎng)邊界處的指針調(diào)整會(huì)影響時(shí)鐘質(zhì)量；</span> </p> <p> <span style="font-size:16px;font-family:"Microsoft YaHei";">(4)設(shè)備內(nèi)置時(shí)鐘源由SETS功能塊提供。</span> </p> <p> <br /> </p> <p> <br /> 寧夏銷售光傳輸設(shè)備烽火STM-1信息凈負(fù)荷位于STM-N幀中第1到第9行。</p> <span style="font-size:16px;font-family:"Microsoft YaHei";"></span><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244847603603516/458709.jpg"></div><p> 隨著科學(xué)技術(shù)的不斷發(fā)展,各行各業(yè)為了滿足自身內(nèi)部的需求，將會(huì)建設(shè)更多，更復(fù)雜的專用網(wǎng)絡(luò)，這些網(wǎng)絡(luò)必將承擔(dān)更多的任務(wù)。 </p> <p> 對(duì)于大多數(shù)專網(wǎng)，在目前的技術(shù)條件下，則應(yīng)利用公眾網(wǎng)實(shí)現(xiàn)企業(yè)或?qū)I(yè)部門的通信需求。利用公眾網(wǎng)滿足專業(yè)部門的需求具有各種不同的方式。如租用公眾網(wǎng)的光芯或傳輸容量，配置自己的交換設(shè)備。這就免除了其困難的光纜輔設(shè)工程，比較適用于具有大規(guī)模用戶的企業(yè)。又如委托公眾網(wǎng)**為本企業(yè)或部門使用的虛擬專用網(wǎng)，它所提供的功能和容量完全按照用戶的要求進(jìn)行，這就免除了全部的投資風(fēng)險(xiǎn)和維護(hù)工作，應(yīng)用機(jī)動(dòng)靈活，使用部門可以專心致力于其本行業(yè)的業(yè)務(wù)工作。 </p> <p> <br /> </p><p> 在各種寬帶光纖接入網(wǎng)技術(shù)中，采用SDH技術(shù)的接入網(wǎng)系統(tǒng)是應(yīng)用比較普遍的。SDH的誕生解決了由于入戶媒質(zhì)的帶寬限制而跟不上骨干網(wǎng)和用戶業(yè)務(wù)需求的發(fā)展,而產(chǎn)生了用戶與**網(wǎng)之間的接入"瓶頸"的問(wèn)題，同時(shí)提高了傳輸網(wǎng)上大量帶寬的利用率。SDH技術(shù)自從90年代引入以來(lái)，至今已經(jīng)是一種成熟、標(biāo)準(zhǔn)的技術(shù)，在骨干網(wǎng)中被***采用，且價(jià)格越來(lái)越低，在接入網(wǎng)中應(yīng)用可以將SDH技術(shù)在**網(wǎng)中的巨大帶寬優(yōu)勢(shì)和技術(shù)優(yōu)勢(shì)帶入接入網(wǎng)領(lǐng)域，充分利用SDH同步復(fù)用、標(biāo)準(zhǔn)化的光接口、強(qiáng)大的網(wǎng)管能力、靈活網(wǎng)絡(luò)拓?fù)淠芰透呖煽啃詭?lái)好處，在接入網(wǎng)的建設(shè)發(fā)展中長(zhǎng)期受益。 </p> <p> <br /> 在各種寬帶光纖接入網(wǎng)技術(shù)中，采用SDH技術(shù)的接入網(wǎng)系統(tǒng)是應(yīng)用最普遍的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡,烽火" src="https://tyunfile.71360.com/UploadFile/sztykc/637244845103378907/6385040.jpg"></div><p> 樹(shù)形網(wǎng) </p> <p> <br /> </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> <br /> </p> <p> 環(huán)形網(wǎng) </p> <p> <br /> </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)前使用其多的網(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> <br /> </p> <p> 網(wǎng)孔形網(wǎng) </p> <p> <br /> </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> <br /> </p> <p> 當(dāng)前用得其多的網(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)。例如一條鏈的兩個(gè)端點(diǎn)上，它是一個(gè)雙端口器件。寧夏銷售光傳輸設(shè)備烽火STM-1</p><p style="text-indent:25px">管理單元指針位于STM-N幀中第4行的***到第9×N列。廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</p><p> SDH的應(yīng)用 </p> <p> 由于以上所述的SDH的眾多特性，使其在廣域網(wǎng)領(lǐng)域和專門用途網(wǎng)領(lǐng)域得到了巨大的發(fā)展。中國(guó)移動(dòng)、電信、聯(lián)通、廣電等電信運(yùn)營(yíng)商都已經(jīng)大規(guī)模建設(shè)了基于SDH的骨干光傳輸網(wǎng)絡(luò)。利用大容量的SDH環(huán)路承載IP業(yè)務(wù)、ATM業(yè)務(wù)或直接以租用電路的方式出租給企、事業(yè)單位。而一些大型的專門用途網(wǎng)絡(luò)也采用了SDH技術(shù)，架設(shè)系統(tǒng)內(nèi)部的SDH光環(huán)路，以承載各種業(yè)務(wù)。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(yuǎn)控、視頻、語(yǔ)音等業(yè)務(wù)。 </p> <p> 而對(duì)于組網(wǎng)更加迫切、而又沒(méi)有可能架設(shè)專門用途SDH環(huán)路的單位，很多都采用了租用電信運(yùn)營(yíng)商電路的方式。由于SDH基于物理層的特點(diǎn)，單位可在租用電路上承載各種業(yè)務(wù)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(fù)用設(shè)備實(shí)現(xiàn)多業(yè)務(wù)的復(fù)用，也可以利用基于IP的設(shè)備實(shí)現(xiàn)多業(yè)務(wù)的分組交換。SDH技術(shù)可真正實(shí)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(duì)安全性非常注重的企業(yè)，SDH租用線路得到了***的應(yīng)用。一般來(lái)說(shuō)，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(shí)在價(jià)格方面，也已經(jīng)為大部分單位所接受。廣東全新光傳輸設(shè)備烽火千兆以太網(wǎng)出線卡</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，擁有一支專業(yè)技術(shù)團(tuán)隊(duì)和良好的市場(chǎng)口碑。公司業(yè)務(wù)涵蓋SDH光傳輸設(shè)備，光端機(jī)，PCM接入設(shè)備，PTN OTN光傳輸設(shè)備等，價(jià)格合理，品質(zhì)有保證。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。騰云科創(chuàng)秉承“客戶為尊、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://www.cdcfah.com/cp/3070943.html</p></div></div></div></div></div><div id="u8d32ak" class="page-right twoColRt"><div id="bldxjls" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="qpm7zrj" class="recomPic likePro"><a href="http://www.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) 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