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...


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...


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...


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....


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,...



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

Step 3) At PC IE browser, please type:

Username: admin      Password: admin

Step 4) Internet Settings – WAN – Cell Modem


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”.


Step 5) Internet Settings – WAN – APN configuration


Click “Advance Parameter Groups” button.


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.


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.


Step8) Activate the “Cell ICMP Check” feature


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.





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 “” and “”, 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



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


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.


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.

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.

-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

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

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.).


文章目录 : 技术相关

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。


文章目录 : 技术相关

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。


文章目录 : 技术相关



文章目录 : 技术相关



文章目录 : 技术相关

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。