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id="xbd2yfh" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/bjxytx/637203860471035157/2115834.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="xc2ikw2" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/bjxytx/637203860471035157/2115834.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="cb8hjgn" 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>北京市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>PTN電源線</p><p><span>***更新：</span>2020-07-22 11:56:38</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="22su4bi" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">北京信億通信技術(shù)有限公司</a></p><p><span>聯(lián)系人：</span>趙小霞</p><p><span>郵箱: </span>330642533@qq.com</p><p><span>電話: </span>13893475678</p><p><span>傳真: </span>0931_4804818</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0931-4804818</p><p><span>地址: </span>回龍觀鎮(zhèn)回龍觀西大街9號(hào)院12號(hào)樓2層1單元205-2</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="jy232mt" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="hcnkzvc" class="box"><p><p><p> 準(zhǔn)確的同步PTN6900分組傳送渠道支撐物理層時(shí)鐘同步機(jī)制，供給外部時(shí)鐘輸入輸出接口和設(shè)備內(nèi)部體系時(shí)鐘，并支撐IEEE1588V2時(shí)鐘／時(shí)間同步和1588ACR時(shí)鐘同步。物理層時(shí)鐘物理層時(shí)鐘同步機(jī)制是從傳輸鏈路物理通道的信號(hào)中提取時(shí)鐘信息，從而完結(jié)頻率同步的技能。PTN6900分組傳送渠道從以下傳輸鏈路中提取時(shí)鐘信息：l支撐從通道化STM-1接口提取時(shí)鐘。l支撐從同步以太網(wǎng)接口提取時(shí)鐘。l支撐從E1接口提取時(shí)鐘。l支撐從2Mbit/s或者2MHz外時(shí)鐘接口獲取時(shí)鐘。同步以太網(wǎng)是一種以太網(wǎng)物理層時(shí)鐘同步技能，類似于SDH時(shí)鐘。直接從以太線路上的串行碼流里提取時(shí)鐘，并利用該時(shí)鐘來(lái)發(fā)送數(shù)據(jù)，完結(jié)時(shí)鐘的傳遞。IEEE1588V2IEEE1588V2是一種時(shí)間同步協(xié)議，精度能夠到達(dá)納秒級(jí)，滿意3G基站的要求。PTN6900分組傳送渠道支撐IEEE1588V2的以下特性：l支撐選用IEEE1588V2協(xié)議完結(jié)時(shí)鐘同步和時(shí)間同步。l支撐BC（BoundaryClock）形式、OC（OrdinaryClock）形式、TC(TransparentClock)/TC+OC時(shí)鐘形式。TC時(shí)鐘又可分為E2E（End-to-End)形式和P2P(Peer-to-Peer)形式。l支撐BMC時(shí)鐘選源算法。1588ACR1588ACR(AdaptiveClockRecover)，是指支撐IEEE1588V2的Master設(shè)備將本地體系時(shí)鐘信息封裝到1588V2。</p></p><p><img src="http://tyunfile.71360.com/UploadFile/bjxytx/637203860471044922/2850135.jpg" /></p><p><p> 又稱PTP）報(bào)文中發(fā)送，經(jīng)第三方網(wǎng)絡(luò)透?jìng)鞯綄?duì)端Slave設(shè)備，Slave設(shè)備從1588V2報(bào)文中獲取時(shí)戳并恢復(fù)時(shí)鐘，完結(jié)PSN網(wǎng)絡(luò)兩端設(shè)備的頻率同步。在這種方案里，中間的第三方網(wǎng)絡(luò)不需要支撐IEEE1588V2協(xié)議。PTN6900設(shè)備支撐的1588V2時(shí)鐘報(bào)文是多播的以太報(bào)文。RNC側(cè)PTN6900設(shè)備將攜帶體系信息的時(shí)戳增加到1588V2時(shí)鐘報(bào)文中，經(jīng)過(guò)第三方網(wǎng)絡(luò)將時(shí)鐘信息多播到NodeB側(cè)的PTN6900設(shè)備。PTN6900設(shè)備接收到1588V2時(shí)鐘報(bào)文后獲取時(shí)戳，經(jīng)過(guò)計(jì)算恢復(fù)出時(shí)鐘并用作體系時(shí)鐘，一起將時(shí)鐘傳遞給NodeB，從而到達(dá)網(wǎng)絡(luò)兩端設(shè)備頻率同步。DHCPRelayPTN6900分組傳送渠道支撐DHCPRelay功用，完結(jié)基站對(duì)IP地址的主動(dòng)獲取?；就娭螅枰?jīng)過(guò)DHCP主動(dòng)獲取IP地址。PTN6900分組傳送渠道坐落基站與操控器之間的傳輸線路上，對(duì)基站與操控器之間的DHCP報(bào)文進(jìn)行中繼。從而使基站獲取IP地址。</p></p><p><img src="http://tyunfile.71360.com/UploadFile/bjxytx/637203860468300782/8931074.jpg" /></p><p>公司成立于2004年，專業(yè)從事通信產(chǎn)品購(gòu)銷以及施工，維護(hù)，產(chǎn)品維修，智能化弱電及計(jì)算機(jī)系統(tǒng)集成施工。公司擁有專業(yè)的技術(shù)團(tuán)隊(duì)，由廠家（中興通訊，華為技術(shù)，烽火）服務(wù)10年以上從業(yè)經(jīng)驗(yàn)的技術(shù)****，并有多名專業(yè)技術(shù)人員為您提供專業(yè)的一站式解決方案。公司主營(yíng)中興通訊及華為技術(shù)，烽火各系列產(chǎn)品板件及整套設(shè)備的銷售與安裝，設(shè)備調(diào)試，維護(hù)及板件返修等。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(chǎng)為廣大行業(yè)用戶提供設(shè)計(jì)、安裝、調(diào)試、培訓(xùn)、維護(hù)的“一條龍”服務(wù)。本公司以質(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)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="PTN電源線" src="http://tyunfile.71360.com/UploadFile/bjxytx/637203860471035157/2115834.jpg"></div></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/673241.html</p></div></div></div></div></div><div id="3srdhnk" class="page-right twoColRt"><div id="2lvmi88" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="2oq7x2v" 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