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The advantage of using wireless data transmission module... Data transmission can be simply divided into two major types: wired (including the installation of optical cables, cables or leased telecommunication lines) and wireless (including the establishment of dedicated wireless data transmission system or the borrowing of CDPD, GSM, CDMA and other public network information platforms).     In...

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Industrial-grade 4G router TCP/IP network architecture 1. Layering of TCP/IP network system   TCP/IP (TransmissionControlProtocol/InternetProtocol), transmission control protocol/Internet protocol. It was developed by the defense advanced research projects agency in the 1970s, and was later integrated into UNIX and popularized. It emerged in the 1980s as the Internet's...

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The structure of 4G DTU The main function of DTU is to transmit data from remote devices back to the background center via wired/wireless. Different data transmission modes of DTU include all-network-connected DTU, GPRS DTU, WIFI DTU, CAN DTU and 4G DTU. Today, we will have a look at the structure and work flow of DTU.   To complete...

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What are the wireless connection technologies of the... Internet of things (iot) applications have been deeply rooted in our lives. The E-Lins H685 industrial-grade router is a small industrial-grade wireless router with single or double LAN ports. TDD/ fdd-lte, 4G, 3G, GPRS network optional. Besides, what are the wireless connectivity technologies for the Internet of things?   1....

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The use of industrial wireless routers Industrial-grade wireless router adopts high performance 32-bit industrial-grade ARM9 communication processor, which is widely used in finance, electric power, postal, water conservancy, environmental protection, meteorology and other industries.   Industrial router is mainly used in intelligent transportation,...

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Quickstart for H685 series 3G 4G routers

文章目录 : 产品文章

Before Installation and Configuration

1. H685 router has different version. Study your router version before installation.

2. For GSM/GPRS/EDGE/HSDPA/HSUPA/HSPA/HSPA+/4G LTE version, please get a SIM card with data business.

3. For CDMA2000 EVDO/CDMA1x version, please get a UIM card with data business or inform us before order if the network uses non-ruim (nam-flashing).

4. Make sure the sim card or uim card is with enough data business and balance.

5. Make sure the signal is good enough where you test or install the router. Weak signal will make the router no work. If you find your signal strength is not good, please contact us for high gain antenna.

6. Different countries and carriers use different network band and frequency. E-Lins packs units with free world-wide-use antenna. It can work, but the data speed or signal may not be good at your sites. Please buy dedicated high gain antenna from your local suppliers or contact E-Lins to OEM/ODM the antenna.

Notes: This quick start is for GSM/GPRS/EDGE/HSDPA/HSUPA/HSPA+/TD-SCDMA network only. For EVDO network or CDMA network, please refer to manual or contact us freely.

Step 1) Confirm the sim card if can work with other 2G/3G/4G router or modem. If the sim card can not work, the router will not work correctly.

Step 2) Connect the H685 Router LAN port to a PC via RJ45 cable. Make the PC automatically to get the IP, Submask, DNS.

 The PC will be get a IP of 192.168.8.xxx.

Step 3) At PC IE browser, please type: http://192.168.8.1

Username: admin      Password: admin

Step 4) Internet Settings – WAN – Cell Modem

Notes:

1)       If you don’t replace any cellular module or not do the “Load Default to factory”, please skip this step and jump to Step 5.

2)       Please be patient that the router will take some more time to dialup online for first configuration,

At “Cell Modem”, please select “AUTO_DETECT”, and click “Apply” button. The router will automatically detect the module modem.

Notes: we highly suggest that reboot the router (power off and re-power on) after we select “AUTO_DETECT”.

 1

Step 5) Internet Settings – WAN – APN configuration

 2

Click “Advance Parameter Groups” button.

 3

Fill in the related parameters. And DO NOT FORGET TO CLICK “Add/Edit” button.

Parameters Groups Name: you can fill in the name freely. But keep No Space between characters.

 4

Dialup: fill in the related parameters. Get this parameter from the Sim Card Provider or Carrier;

APN: fill in the related parameters. Get this parameter from the Sim Card Provider or Carrier;

User: fill in the related parameters. Get this parameter from the Sim Card Provider or Carrier.
Notes: If your SIM card has no user name, please input out default value, otherwise the router may not dialup. Our default value for GSM/WCDMA/LTE is “wap”, and for CDMA/EVDO is “card”.

Password: fill in the related parameters. Get this parameter from the Sim Card Provider or Carrier.
Notes: If your SIM card has no user name, please input out default value, otherwise the router may not dialup. Our default value for GSM/WCDMA/LTE is “wap”, and for CDMA/EVDO is “card”.

Step 6) Click “Apply” button or Re-power the router to reboot. Then H685 router will dialup to be online.

Once it’s online, the CELL LED will light on.
Notes: sometimes the router cannot dialup after the APN configuration, please power off the router, and re-power on it. Because some radio modules need reboot after the initial APN configuration.

Step 7) Once H685 router is online, it gets a WAN IP Address and Status Page will show similar info.

 5

Step8) Activate the “Cell ICMP Check” feature

Notes:

1) For router working with best stability, we highly suggest activate and use this feature.

With this feature, the Router will automatically detect its working status and fix the problem.

2) Please disable the “Ping from WAN Filter” if use ICMP check feature, otherwise it cannot work.

 

6

7

 

l         Active: tick it to enable ICMP check feature

l     Check method: fill in checking domain name or IP. Click HOST/IP check button to verify before using it.

l     Check interval time (sec): set the interval time of every check

l     Check Count: set the checking count number

l     Reboot Count Before Sleep: H685 Router will sleep to stop checking after failed with set times.

l     Sleep Time (min): H685 Router sleep timing before resume check.

 

Example with above picture:

H685 Router check “www.google.com” and “112.134.33.8”, it will check 3 times. After the previous check, it will do next check after 60 seconds. Totally it will check 3 times. If 3 times all failed, H685 Router will reboot. If reboots 3 times continuously, H685 Router goes to sleep to stop checking. The sleep time is 5 minutes. After 5 minutes, H685 Router resumes to cycle the checking.

 

E-Lins products FAQ — Router Cell Low Signal

文章目录 : 伊林思产品FAQ

Issue: Router Cell Low Signal

 

Related Pictures:

cell low signal

 

Description:

At H685/H820 router, the web status page indicates low signal number or bar.

 

Main Cause and Solution:

Item Cause Solution
1 cellular network low signal in the site try to move to other place to test if can get better signal
2 antenna not gain good signal try to change another antenna. E-Lins antenna is world-wide use, please ask for dedicated antenna or get dedicated antenna for your carriers from the local antenna sellers.

Latest H685 Openwrt LTE Router for Australia

文章目录 : 产品文章

Introduction

The H685 series Cellular Router designed for establish a 2G/3G/4G cellular and Wi-Fi wireless network and share a cellular broadband connection. The H685 series Cellular Router enables users to quickly create a secure Wi-Fi (802.11 b/g/n) network and provide access to the Internet using a cellular network. By connect to cellular mobile network; an Internet connection can be accessed and shared virtually anywhere within a wireless broadband network.

E-Lins’ mobile data products are widely used in more than twenty industrial fields, such as power control, water schedule, traffic, oil field, weather forecast, environmental protection, street lamp control, post, bank and many other areas

Industrial Application

  •          Remote Data Monitor and Control
  •          CCTV, security surveillance
  •          Water, gas and oil flow metering and schedule
  •          AMR (automatic meter reading)
  •          Power station monitoring and control
  •          Remote POS (point of sale) terminals, ATM,
  •          Traffic signals monitor and control, Traffic info guidance
  •          Oil field, weather forecast, environmental protection, street lamp monitoring and control
  •          Early Warning of Mountain Torrent
  •          Fleet management
  •          Power distribution network supervision
  •          Central heating system supervision
  •          Weather station data transmission
  •          Hydrologic data acquisition
  •          Vending machine
  •          Telemetry, SCADA
  •          Vehicle logistics and diagnostics controlling
  •          Parking meter and Taxi Monitor
  •          Telecom equipment supervision (Mobile base station, microwave or optical relay station)

The NEW H685 openwrt router adopted the latest developed firmware, which is much more powerful than before. The most  remarkable feature is OpenVPN, this means a lot.

OpenVPN’s use of common network protocols (TCP and UDP) makes it a desirable alternative to IPsec in situations where an ISP may block specific VPN protocols in order to force users to subscribe to a higher-priced, “business grade,” service tier。

 

When OpenVPN uses Transmission Control Protocol (TCP) transports to establish a tunnel, performance will be acceptable only as long as there is sufficient excess bandwidth on the un-tunneled network link to guarantee that the tunneled TCP timers do not expire. If this becomes untrue, performance falls off dramatically. This is known as the “TCP meltdown problem”

Besides, H685 added 700Mhz(B28) in its range this time, especially for Australia users.

TDD LTE and FDD LTE

文章目录 : 技术相关

As we know, the LTE mainly covers two types, which are TDD and FDD.  Let’s talk something about TDD LTE and FDD LTE’s Advantages / disadvantages of for cellular communications.

There are a number of the advantages and disadvantages of TDD and FDD that are of particular interest to mobile or cellular telecommunications operators. These are naturally reflected into LTE.

COMPARISON OF TDD LTE AND FDD LTE DUPLEX FORMATS
PARAMETER TDD LTE FDD LTE
Channel reciprocity Channel propagation is the same in both directions which enables transmit and receive to use on set of parameters Channel characteristics different in both directions as a result of the use of different frequencies
Paired spectrum Does not require paired spectrum as both transmit and receive occur on the same channel Requires paired spectrum with sufficient frequency separation to allow simultaneous transmission and reception
Hardware cost Lower cost as no diplexer is needed to isolate the transmitter and receiver. As cost of the UEs is of major importance because of the vast numbers that are produced, this is a key aspect. Diplexer is needed and cost is higher.
UL / DL asymmetry It is possible to dynamically change the UL and DL capacity ratio to match demand UL / DL capacity determined by frequency allocation set out by the regulatory authorities. It is therefore not possible to make dynamic changes to match capacity. Regulatory changes would normally be required and capacity is normally allocated so that it is the same in either direction.
Guard period / guard band Guard period required to ensure uplink and downlink transmissions do not clash. Large guard period will limit capacity. Larger guard period normally required if distances are increased to accommodate larger propagation times. Guard band required to provide sufficient isolation between uplink and downlink. Large guard band does not impact capacity.
Cross slot interference Base stations need to be synchronised with respect to the uplink and downlink transmission times. If neighbouring base stations use different uplink and downlink assignments and share the same channel, then interference may occur between cells. Not applicable
Discontinuous transmission Discontinuous transmission is required to allow both uplink and downlink transmissions. This can degrade the performance of the RF power amplifier in the transmitter. Continuous transmission is required.

 

Advantages and Disadvantages of 4G WIRELESS TECNOLOGY

文章目录 : 技术相关

Today is the day of high data requirement in internet. In most field the wireless system is very widely used. Currently a number of technologies like 1G, 2G, 2.5G, 3G, 3.5G etc.  A new technology is introduced which is called as 4G technology.

Fourth generation wireless system is a packet switched wireless system with wide area coverage and high throughput. It is designed to be cost effective and to provide high spectral efficiency. Data rate of 20mbps is employed. Mobile speed will be up to 200km/hr. The high performance is achieved by the use of long term channel in both time termchannel in both time and frequency, scheduling among users and smart antennas combined with adaptive modulation and power control. Frequency band is 2-8 GHz. it gives the ability for world wide roaming to access cell anywhere.It uses OFDM (ortogonal frequency divisional multiplexing) and Ultra Wide Radio Band(UWB), and Millimeter wireless and smart antenna.4G uses a multi network functional device software which is very helpful for multiple user.

Advantages
-support for interactive multimedia, voice, streaming video, Internet, and other broadband services -IP based mobile system-High speed, high capacity, and low cost per bit. -global access, service portability, and scalable mobile services -Seamless switching and a variety of Quality of

-Better spectral efficiency. Service driven services.
- Better scheduling and call admission control techniques

Disadvantages
-Expensive and hard to implement
-bettery usage is more
-needs complex hardware

Conclusion
There is a need for next generation of wireless technology i.e. 4G which will be a platform for seamless technology providing widespread coverage, band width and power consumption with higher data rates (100Mbps, 150Mbps and 300Mbps, future will update to 1000Mbps, etc.).

路由器不能上网怎么解决

文章目录 : 技术相关

路由器不能上网怎么解决
随着电脑和网络的普及,在家上网已经成为司空见惯的事了,有的家庭可能家中不只一台电脑,这时候为了保证家里各个成员都可以上网有一台路由器就是必备的了。但是有的朋友经常因为配置有误而造成路由器产生故障,那么今天就让编辑给你支支招帮您轻松搞定这些问题。
无法浏览网页
故障现象:网页以不能正常打开,但是QQ之类的程序却可以正常运行。
解决方法:要解决这个问题,建议在路由器和计算机网卡上手动设置DNS服务器地址((ISP局端提供的地址),打开路由器设置界面,找到“网络参数”中的“WAN口参数”的字段,然后在下面手动设置DNS服务器地址。另外,在“DHCP服务”设置项,也需要手动设置DNS服务器和备用的DNS服务器地址,该地址需要从ISP供应商那里获取。
无法进行拨号
故障现象:不能进行正常的拨号程序。
解决方法:这种问题的解决方法比较简单,具体做法是:打开Web浏览器,在地址栏中输入路由器的管理地址,如192.168.1.1,此时系统会要求输入登录密码(该密码可以在产品的说明书上查询到),登陆后进入管理界面,选择菜单“网络参数”下的“WAN口设置选项,在右边主窗口中,“WAN口连接类型”选择“PPPoE”,输入“上网账号”及“上网口令”,点击连接按钮即可。
部分计算机无法正常连接
故障现象:路由器硬件上没有问题,所连接的计算机也没有问题,但是却不能实现正常连接,而局域网中的其他计算机可以正常连接上网。
解决方法:先将被绑定MAC地址的计算机连接至路由器LAN端口(但路由器不要连接Modem或ISP提供的接线),然后,采用路由器的MAC地址克隆功能,将该网卡的MAC地址复制到宽带路由器的WAN端口,接着在未被绑定的计算机上进行如下操作:Windows 2000/XP下按“开始→运行”,输入“cmd/k ipconfig /all”,其中“Physical Address”就是本机MAC地址。

串联两个路由器如何上网

文章目录 : 技术相关

串联两个路由器如何上网
在我们上网的时候通常会发现这样的一种情况,在一根网线已经链接到了一个路由器的接口之后,我们姑且将它称之为路由器A,在路由器A再分出一根线还要链接另外一个路由器,我们称之为路由器B,那么问题是这个路由器…
在我们上网的时候通常会发现这样的一种情况,在一根网线已经链接到了一个路由器的接口之后,我们姑且将它称之为路由器A,在路由器A再分出一根线还要链接另外一个路由器,我们称之为路由器B,那么问题是这个路由器B该怎样实现正常的上网功能呢?
今天我们来谈一下利用两台路由器,网线和电脑这三者的链接方式和设置办法,从而实现最终的双重上网功能。具体的步骤是:首先需要查看一下两款路由器的IP地址是否一致,如果不相同的话那么可以跳过这步,实际上一般的路由器的IP是192.168.0.1。接着进入路由器B的管理界面,找到路由器B的LAN接口,并将路由器B的IP地址设置为192.168.1.1,然后保存。那么以后路由器B的IP就变成了重新设置好的这个地址了。
接着,让让路由器A连接到网络并进入路由器A的管理界面,同时将DNS和子网掩码等信息复制,并在界面上显示出来。然后,将路由器A的LAN口分出来的网线连接到路由器B的WAN接口上,最后在浏览器中输入设置之后的IP地址再进入路由器B。在路由器B中找到其WAN接口,将之设置为静态IP。
将路由器A的 LAN口分出的网线连接到路由器B的WAN口上,再到浏览器中输入修改后的IP地址进入路由器B的管理界面192.168.0.X,这个叉一般表示的是22到254之间任何的参数。其中,子网掩码和DNS的信息与路由器A相同,网关设置为路由器A的管理IP地址,将设置好的IP地址点击保存。
到了此刻,两台路由器就实现了串接,一般当路由器A上网的时候,路由器B连接到电脑之后同样也就可以上网了。

新装系统路由器配置方法

文章目录 : 技术相关

新装系统路由器配置方法
随着应用win7系统的人越来越多,对于这个系统的应用就更多了,其中大家最关注的就是这个系统和路由器上网的问题。下面,我们就来讲解一下win7系统的路由器的设置过程。
首先打开浏览器,在地址栏输入192.168.1.1之后会弹出对话框,接着输入账号和密码,只要没有设置过,一般的路由器账号和密码都是admin。
再登陆路由器的界面之后出现设置路由器的界面,选择好上网方式,点击下一步,接着继续点击下一步输入必要的上网账户信息再次点击下一步,然后进入无线设置,点击下一步,然后开启DHCP功能(一般是点击系统的右下角的图标)。
最后,右键打开网络中心选择本地连接,回到浏览器选择点击完成就OK咯!

路由器WAN口指示灯不亮是什么原因

文章目录 : 技术相关

路由器WAN口指示灯不亮是什么原因
路由器WAN口灯不亮,检查了路由器的连接,发现线路连接正常。路由器的设置也没有问题,多次试验后路由器WAN口指示灯依旧不亮,出现这种情况该如何解决?
1.首先检查物理线路是否过长,双绞线传输距离一般为100米,如果超过此距离,信号在传输方面会出现衰减比较严重等现象,造成WAN口灯不亮。
2.查看路由器WAN口的端口模式,可能端口模式不匹配。比如网通线路是10M全双工的,而路由器WAN口设置的是100M全双工的,就出现这种情况。尝试修改WAN口速率为10M全双工。
3.检查WAN口是否正常,可以将WAN口连接其他设备或直接连接电脑。如果指示灯正常,能够通讯,则说明WAN口正常。如果指示灯不亮,不能通讯则说明WAN口有问题。
4.检查网线是否正常,可以换根网线或将网线插在其他设备上,看是否正常。
以上就是路由器WAN口指示灯不亮的原因分析及其解决方法,路由器运作不正常时也需要查看指示灯工作状态。

路由器怎么样共享文件

文章目录 : 技术相关

路由器怎么样共享文件
我现在用的是台式电脑,另外买了一个笔记本。我想把电脑里的文件都复制到笔记本上去。有一个路由器,请问怎么建立共享呢?
右键网上邻居属性,设置家庭或小型办公网络,然后一直下一步,中间需要选择的是“此计算机通过居民网的网关或网络上的其它计算机连接到Internet”、两台电脑设一个工作组名比如“MSHOME”、“启用文件和打印机共享”、“完成该向导,我不需要在其它计算机上运行该向导”,最后完成。
右键我的电脑——属性——计算机名——网络ID,然后选择“本机是商业网络的一部分, 用它连接到其它工作着的计算机”、“公司使用没有域的网络”、工作组名称写成和第一步里的一样,最后完成。
开始——设置——控制面板——用户帐户,在这里开启Guest来宾帐户。
右键我的电脑——管理——本地用户和组——用户,Administrator帐户里勾上“密码永不过期”,Guest帐户里勾上“用户不能更改密码、密码永不过期”确定。
开始——设置——控制面板——管理工具——本地安全策略——用户权利指派
a.从网络访问此计算机——添加用户和组,这里输入“Guest”确定。
b.拒绝从网络访问这台计算机,这里有什么项都删除然后确定。
开始——设置——控制面板——管理工具——本地安全策略——安全选项
a.网络访问:本地帐户的共享和安全模式改为“经典-本地用户以自己的身份验证”
b.帐户:管理员帐户状态改为启用
c.帐户:来宾帐户状态改为启用
d.帐户:使用空白密码的本地帐户只允许进行控制台登录改为禁用
两台电脑分别设IP,右键网上邻居——属性,本地连接——属性——TCP/IP协议,把IP地址,其中一台电脑设为192.168.1.2,另一台设为192.168.1.3,子网掩码是自动的,默认网关都设为192.168.1.1
以上步骤都做下来,一个局域网就做好了,再后面你只需要把两台电脑互相需要访问的磁盘设为共享就可以了。