浙江11选5开奖结果查询

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DTU

1970-01-01

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DTU (Data Transfer unit)QUANCHENGSHUJUCHUANSHUDANYUAN,SHIZHUANMENYONGYUJIANGCHUANKOUSHUJUZHUANHUANWEIIPSHUJUHUOJIANGIPSHUJUZHUANHUANWEICHUANKOUSHUJUTONGGUOWUXIANTONGXIN WANGLUOJINXINGCHUANSONGDEWUXIANZHONGDUANSHEBEI。

  DTUYINGJIANZUCHENG

浙江11选5开奖结果查询  DTU YINGJIANZUCHENGBUFENZHUYAOBAOKUOCPUKONGZHIMOKUAI、WUXIANTONGXUNMOKUAIYIJIDIANYUANMOKUAI

  DTU YOUDIAN

  ZUWANGXUNSULINGHUO,JIANSHEZHOUQIDUAN、CHENGBENDI;

  WANGLUOFUGAIFANWEIGUANG;

  ANQUANBAOMIXINGNENGHAO;

浙江11选5开奖结果查询  LIANLUZHICHIYONGYUANZAIXIAN、ANLIULIANGJIFEI、YONGHUSHIYONGCHENGBENDI;

浙江11选5开奖结果查询GPRS DTUDEHEXINGONGNENG

 1)内部集成TCP/IP协议栈
  GPRS DTU内部封装了PPP拨号协议以及TCP/IP协议栈并且具有嵌入式操作系统,从硬件上,它可看作是嵌入式PC与无线GPRS MODEM的结合;它具备GPRS拨号上网以及TCP/IP数据通信的功能。
  2)提供串口数据双向转换功能
  GPRS DTU提供了串行通信接口,包括RS232,RS485,RS422等都属于常用的串行通信方式,而且GPRS DTU在设计上大都将串口数据设计成“透明转换”的方式,也就是说GPRS DTU可以将串口上的原始数据转换成TCP/IP数据包进行传送,而不需要改变原有的数据通信内容。因此,GPRS DTU可以和各种使用串口通信的用户设备进行连接,而且不需要对用户设备作改动。
  3)支持自动心跳,保持永久在线
  GPRS通信网络的优点之一就是支持GPRS终端设备永久在线,因此典型的GPRS DTU在设计上都支持永久在线功能,这就要求DTU包含了上电自动拨号、采用心跳包保持永久在线(当长时间没有数据通信时,移动网关将断开DTU与中心的连接,心跳包就是DTU与数据中心在连接被断开之前发送一个小数据包,以保持连接不被断开)、支持断线自动重连、自动重拨号等特点。
  4)支持参数配置,永久保存
  GPRS DTU作为一种通信设备,其应用场合十分广泛。在不同的应用中,数据中心的IP地址及端口号,串口的波特率等都是不同的。因此,GPRS DTU都应支持参数配置,并且将配置好的参数保存内部的永久存储器件内(一般为FLASH或EEPROM等)。一旦上电,就自动按照设置好的参数进行工作。
  5)支持用户串口参数设置
浙江11选5开奖结果查询  不同用户设备的串口参数有所不同,DTU连接用户设备的串口时,要根据用户设备串口的实际参数对DTU端进行相应设置,保证用户设备的正常通信和可靠数据传输。

 

GPRS DTUDEKUOZHANGONGNENG

  JIAOWEIZHUANYEDEGPRS DTUHAITIGONGYIXIEKUOZHANGONGNENG,ZHUYAOBAOKUO:ZHICHISHUJUZHONGXINYUMINGJIEXI、ZHICHIYUANCHENGCANSHUPEIZHI、YUANCHENGGUJIANSHENGJI、ZHICHIYUANCHENGDUANXIN/DIANHUAHUANXING、ZHICHIBENDICHUANKOUGUJIANSHENGJI、TIGONGDUANXINTONGDAO、TIGONGDTUZAIXIAN、LIXIANDIANPINGZHISHIDENG。  GENGGAOJIDEDTU,YEKEJIYONGHUTIGONGERCIKAIFADEGONGNENG;LIRU;TONGXINCHAJIAN、DLL、JIEKOUWENDANG,YIBIANYONGHUGENJUZIJIDESHIJIQINGKUANGDUIDTUJINXINGGAIZAO,WANSHANDTUCHANPIN,SHIQIGENGJIADEQIEHEZISHENXUQIU。

GPRS DTUGONGZUOGUOCHENGMIAOSHU

  GPRS DTUSHANGDIANHOU,SHOUXIANDUCHUNEIBUFLASHZHONGBAOCUNDEGONGZUOCANSHU(BAOKUOGPRSBOHAOCANSHU,CHUANKOUBOTELV,SHUJUZHONGXINIPDIZHIDENGDENG,SHIXIANYIJINGPEIZHIHAO)。

  GPRS DTUDENGLUGSMWANGLUO,RANHOUJINXINGGPRS PPPBOHAO。BOHAOCHENGGONGHOU,GPRSDTUJIANGHUODEYIGEYOUYIDONGSUIJIFENPEIDENEIBUIPDIZHI(YIBANSHI10.X.X.X)。YEJIUSHISHUO,GPRSDTUCHUYUYIDONGNEIWANGZHONG,ERQIEQINEIWANGIPDIZHITONGCHANGSHIBUGUDINGDE,SUIZHEMEICIBOHAOERBIANHUA。 WOMENKEYILIJIEWEIGPRSDTUZHEISHISHIYIGEYIDONGNEIBUJUYUWANGNEIDESHEBEI,TONGGUOYIDONGWANGGUANLAISHIXIANYUWAIBUInternetGONGWANGDETONGXIN。ZHEIYUJUYUWANGNEIDEDIANNAOTONGGUOWANGGUANFANGWENWAIBUWANGLUODEFANGSHIXIANGSI。

  GPRS DTUZHUDONGFAQIYUSHUJUZHONGXINDETONGXINLIANJIE,BINGBAOCHITONGXINLIANJIEYIZHICUNZAI。 YOUYUGPRSDTUCHUYUYIDONGNEIWANG,ERQIEIPDIZHIBUGUDING。YINCI,ZHINENGYOUGPRS DTUZHUDONGLIANJIESHUJUZHONGXIN,ERBUNENGYOUSHUJUZHONGXINZHUDONGLIANJIEGPRSDTU。ZHEIJIUYAOQIUSHUJUZHONGXINJUBEIGUDINGDEGONGWANGIPDIZHIHUOGUDINGDEYUMING。SHUJUZHONGXINDEGONGWANGIPDIZHIHUOGUDINGDEYUMINGZUOWEICANSHUCUNCHUZAIGPRS DTUNEI,YIBIANGPRSDTUYIDANSHANGDIANBOHAOCHENGGONG,JIUKEYIZHUDONGLIANJIEDAOSHUJUZHONGXIN。

  JUTIDIJIANG,GPRSDTUTONGGUOSHUJUZHONGXINDEIPDIZHI(RUGUOSHICAIYONGZHONGXINYUMINGDEHUA,XIANTONGGUOZHONGXINYUMINGJIEXICHUZHONGXINIPDIZHI)YIJIDUANKOUHAODENGCANSHU,XIANGSHUJUZHONGXINFAQITCPHUOUDPTONGXINQINGQIU。ZAIDEDAOZHONGXINDEXIANGYINGHOU,GPRS DTUJIRENWEIYUZHONGXINWOSHOUCHENGGONG,RANHOUJIUBAOCHIZHEIGETONGXINLIANJIEYIZHICUNZAI,RUGUOTONGXINLIANJIEZHONGDUAN,GPRSDTUJIANGLIJIZHONGXINYUZHONGXINWOSHOU。

浙江11选5开奖结果查询  YOUYUTCP/UDPTONGXINLIANJIEYIJINGJIANLI,JIUKEYIJINXINGSHUJUSHUANGXIANGTONGXINLE。

  DUIYUDTULAISHUO,ZHIYAOJIANLILEYUSHUJUZHONGXINDESHUANGXIANGTONGXIN,WANCHENGYONGHUCHUANKOUSHUJUYUGPRSWANGLUOSHUJUBAODEZHUANHUANJIUXIANGDUIJIANDANLE。YIDANJIESHOUDAOYONGHUDECHUANKOUSHUJU,DTUJIULIJIBACHUANKOUSHUJUFENGZHUANGZAIYIGETCP/UDPBAOLI,FASONGJISHUJUZHONGXIN。FANZHI,DANGDTUSHOUDAOSHUJUZHONGXINFALAIDETCP/UDPBAOSHI,CONGZHONGQUCHUSHUJUNEIRONG,LIJITONGGUOCHUANKOUFASONGJIYONGHUSHEBEI。

  TONGGUOYOUXIANDESHUJUCAIJIZHONGXIN,TONGSHIYUHENDUOGEGPRS DTUJINXINGSHUANGXIANGTONGXIN。ZHEISHIMUQIANGPRS DTUYINGYONGXITONGZHONGZUIWEICHANGYONGDEFANGSHI。

DTUYINGYONGXITONGHEYINGYONGLINGYU

  DTUDEZHUYAOGONGNENGSHIBAYUANDUANSHEBEIDESHUJUTONGGUOWUXIANDEFANGSHICHUANSONGHUIHOUTAIZHONGXIN。RUYOUTUSUOSHI,YAOWANCHENGSHUJUDECHUANSHUXUYAOJIANLIYITAOWANZHENGDESHUJUCHUANSHUXITONG。ZAIZHEIGEXITONGZHONGBAOKUO:DTU,KEHUSHEBEI、YIDONGWANGLUO、HOUTAIZHONGXIN。ZAIQIANDUAN,DTUHEKEHUDESHEBEITONGGUO232HUOZHE485JIEKOUXIANGLIAN。DTUSHANGDIANYUNXINGHOUXIANZHUCEDAOYIDONGDEGPRSWANGLUO,RANHOUQUHESHEZHIZAIDTUZHONGDEHOUTAIZHONGXINJIANLISOCKETLIANJIE。HOUTAIZHONGXINZUOWEISOCKETDEFUWUDUAN,DTUSHISOCKETLIANJIEDEKEHUDUAN。YINCIZHIYOUDTUSHIBUNENGWANCHENGSHUJUDEWUXIANCHUANSHUDE,HAIXUYAOYOUHOUTAIRUANJIANDEPEIHEYIQISHIYONG。ZAIJIANLILIANJIEHOU,QIANDUANDESHEBEIHEHOUTAIDEZHONGXINJIUKEYITONGGUODTUJINXINGWUXIANSHUJUCHUANSHULE,ERQIESHISHUANGXIANGDECHUANSHU。

  DTUXIANZAIYIJINGGUANGFANYINGYONGYUDIANLI、HUANBAO、LEDXINXIFABU、WULIU、SHUIWEN、QIXIANGDENGXINGYELINGYU。RUSHANGTUSUOSHI,JINGUANYINGYONGDEXINGYEBUTONG,DANYINGYONGDEYUANLISHIXIANGTONGDE。DADOUSHIDTUHEXINGYESHEBEIXIANGLIAN,RANHOUHEHOUTAIJIANLIWUXIANDETONGXINLIANJIE。ZAIWULIANWANGRIYIFAZHANDEJINTIAN,DTUDESHIYONGYEYUELAIYUEGUANGFAN。WEIGEXINGYEZHIJIANDECHANYERONGHETIGONGLEBANGZHU。

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