上海4G-DTU外殼網(wǎng) 誠信互利滄州萬瑞電子機箱供應-b2b網(wǎng)站_b2b電子商務平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="DTU(DataTransferunit)，是專門用于將串口數(shù)據(jù)轉化為IP數(shù)據(jù)或將IP數(shù)據(jù)轉化為串口數(shù)據(jù)經(jīng)過無線通訊網(wǎng)絡進行傳送的無線終端設備。DTU廣（guang）泛運用于氣候、水文水利、地質等作業(yè)。DTU一起也是世界前列理工大學丹麥技能"><meta name="keywords" content="上海4G-DTU外殼網(wǎng)"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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href="http://www.cdcfah.com/cp/third-jwjjg_jjg/">鈑金加工</a>?上海4G-DTU外殼網(wǎng) 誠信互利滄州萬瑞電子機箱供應</p><div id="sgyfhtv" class="leftbox clearfix"><h1>上海4G-DTU外殼網(wǎng) 誠信互利滄州萬瑞電子機箱供應</h1><div id="xr34umo" class="proBig"><div id="83jqn82" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974538984691_nhsdo_5544629.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="8pk3mog" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974538984691_nhsdo_5544629.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="mgnphol" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>河北省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關鍵詞：</span>上海4G-DTU外殼網(wǎng)</p><p><span>***更新：</span>2020-06-01 22:08:34</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="vkhjlsu" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">滄州萬瑞電子機箱有限公司</a></p><p><span>聯(lián)系人：</span>李文超</p><p><span>郵箱: </span>2816163037@qq.com</p><p><span>電話: </span>19103271861</p><p><span>傳真: </span>0317_4371300</p><p><span>網(wǎng)址: </span></p><p><span>手機: </span>0317-4371300</p><p><span>地址: </span>河北省滄州市青縣農(nóng)場四分場</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="shzbdp7" class="page-proshow02"><p class="title">詳細說明</p><div id="ji3vcji" class="box"><p><p style="text-indent:25px">DTU (Data Transfer unit)，是專門用于將串口數(shù)據(jù)轉化為IP數(shù)據(jù)或將IP數(shù)據(jù)轉化為串口數(shù)據(jù)經(jīng)過無線通訊網(wǎng)絡進行傳送的無線終端設備。DTU廣（guang）泛運用于氣候、水文水利、地質等作業(yè)。 DTU一起也是世界前列理工大學丹麥技能大學 (Technical University of Denmark) 的英文簡稱。數(shù)據(jù)傳輸單元 (DTU) 數(shù)據(jù)傳輸單元DTU (Data Transfer unit)，是專門用于將串口數(shù)據(jù)轉化為IP數(shù)據(jù)或將IP數(shù)據(jù)轉化為串口數(shù)據(jù)經(jīng)過無線通訊網(wǎng)絡進行傳送的無線終端設備。硬件組成 DTU 硬件組成部分首要包含CPU操控模塊，上海4G-DTU外殼網(wǎng)，上海4G-DTU外殼網(wǎng)、無線通訊模塊以及電源模塊 DTU 利益: 組網(wǎng)迅速活絡，上海4G-DTU外殼網(wǎng)，建設周期短、成本低; 網(wǎng)絡覆蓋規(guī)模廣; 安全保密性能好; 鏈路支撐長久在線、按流量計費、用戶運用成本低; </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海4G-DTU外殼網(wǎng)" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974538984691_nhsdo_5544629.jpg"></div><p style="text-indent:25px">GPRS DTU主動主張與數(shù)據(jù)中心的通訊銜接，并堅持通訊銜接一直存在。由于GPRS DTU處于移動內(nèi)網(wǎng)，并且IP地址不固定。因而，只能由GPRS DTU主動銜接數(shù)據(jù)中心，而不能由數(shù)據(jù)中心主動銜接GPRS DTU。這就要求數(shù)據(jù)中心具有固定的公網(wǎng)IP地址或固定的域名。數(shù)據(jù)中心的公網(wǎng)IP地址或固定的域名作為參數(shù)存儲在GPRS DTU內(nèi)，以便GPRS DTU一旦上電撥號成功，就能夠主動銜接到數(shù)據(jù)中心。詳細地講，GPRS DTU經(jīng)過數(shù)據(jù)中心的IP地址(假如是選用中心域名的話，先經(jīng)過中心域名解析出中心IP地址)以及端口號等參數(shù)，向數(shù)據(jù)中心主張TCP或UDP通訊懇求。在得到中心的響應后，GPRS DTU即認為與中心握手成功，然后就堅持這個通訊銜接一直存在，假如通訊銜接中止，GPRS DTU將當即從頭與中心握手。由于TCP/UDP通訊銜接現(xiàn)已樹立，就能夠進行數(shù)據(jù)雙向通訊了。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海4G-DTU外殼網(wǎng)" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974541328336_nhsdo_5043193.jpg"></div><p style="text-indent:25px">軟件組成 4.1 TCP/UDP透明數(shù)據(jù)傳輸;支撐多種作業(yè)辦法。心跳包技能 4.2 智能防掉線，支撐在線檢測，在線堅持，掉線主動重撥，確保設備長久在線 4.3 支撐RSA，RC4加密算法 4.4 支撐虛擬值守VWM(Virtual Man Watch)功用，確保體系安穩(wěn)牢靠 4.5 支撐虛擬數(shù)據(jù)**網(wǎng)(APN/VPDN) 4.6 支撐數(shù)據(jù)中心動態(tài)域名和IP地址訪問 4.7 支撐DNS動態(tài)獲取，防止DNS服務器失常導致的設備當機 4.8 支撐雙數(shù)據(jù)中心備份 4.9 支撐多數(shù)據(jù)中心一起承受數(shù)據(jù) 4.10支撐短信、語音、數(shù)據(jù)等喚醒辦法以及超時斷開網(wǎng)絡聯(lián)接 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上海4G-DTU外殼網(wǎng)" src="http://tyunfile.71360.com/UpLoadFile/2019/8/20/11/637018974438696224_nhsdo_5835926.jpg"></div></p><br /><p>文章來源地址: 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