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,...



Wireless M2M Solution for Traffic

文章目录 : 其他

Wireless M2M Solution for Traffic

Smart Traffic is a new type of transportation of information, intelligence and socialization, making use of advanced tech, including information, communication, and control. Car satellite positioning system is quite a good example. GPRS/CDMA network could also be applied to position buses, taxies, trucks, to master the overall situation for monitor and dispatch

Wireless M2M Solution for Financial System

文章目录 : 其他

Wireless M2M Solution for Financial System

POS (Point of Sales) real-time service system is the important base of realizing commercial automation.China’s banks have set up their own systems of cable access to POS systems, but the cable POS machines are always restricted by space and telecommunication lines, which make it hard to achieve the goal that card consumption can be quick and checked at anytime and anyplace. The access way of GPRS wireless POS machines can solve the problem that POS machines can only be used on some fixed occasions, which makes POS machines not restricted by the telecommunication, and now it has been widely accepted by customers, such as, hotels, gas companies, bus companies, highway authorities, banks, distribution centers, passenger ticketing centers, taxation departments, delivery companies, and mobile sales offices, etc.

Wireless M2M Solution for Water Conservancy

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Wireless M2M Solution for Water Conservancy

Hydrological station is a site to collect basic water information, the basis for hydrological work. With basin’s rapid economic growth and population growth, conflict between water supply and demand is more and more prominent.  Real-time hydrological data, collected by hydrological station, is in great demand. The use of digital video surveillance system, to collect data, image, sound, video, improves accuracy. Hydrological stations spread widely and remotely. Thus, it’s impossible to use of wired or fiber communication to delivery data. In contrast, wireless communication wiring is simple, convenient, and the cost is relatively low, saving a lot of investment. E-Lins Router series is a smart choice for hydrological application

Difference in between LTE FDD and TDD?

文章目录 : 其他

What is difference in between LTE FDD & TDD?

In both LTE FDD and LTE TDD, the transmitted signal is organized into subframes of 1 millisecond (ms) duration and 10 subframes constitute a radio frame. Each subframe normally consists of 14 OFDM symbols (12 OFDM symbols in case of the so-called Extended Cyclic Prefi).

Although the frame structure is, in most respects, the same for LTE FDD and LTE TDD, there are some differences between the two, most notably the use of special subframes in TDD. Another difference is the other subframes are allocated either for uplink transmission or for downlink transmission.

In case of FDD operation, there are two carrier frequencies, one for uplink transmission (fUL) and one for downlink transmission (fDL). During each frame, there are consequently 10 uplink subframes and 10 downlink subframes and uplink and downlink transmission can occur simultaneously within a cell.

In case of TDD operation, there is only one single carrier frequency and uplink and downlink transmissions in the cell are always separated in time. As the same carrier frequency is used for uplink and downlink transmission, both the base station and the mobile terminals must switch from transmission to reception and vice versa. Thus, as a subframe is either an uplink subframe or a downlink subframe, the number of subframes per radio frame in each direction is less than 10.

Check further info at for 4G LTE info.

Embeded module MC73xx

文章目录 : 其他

AirPrime MC73XX and EM73XX embedded modules deliver high speed, LTE connectivity for integration into smaller, thinner devices. Available in both MC (PCI Express Mini Card) and EM (PCI Express M.2) form factors, these modules feature multi-operator support, allowing PC OEMs to address worldwide markets, and for end-customers to choose or change their network providers without purchasing new devices.

The MC7355 /EM7355 is built for North America, the MC7305 / EM7305 for Europe, and the MC7330 / EM7330 for Japan.

Air Interface LTE
CDMA (MC7355 only)
Peak Download Rate 100 Mbps
Peak Upload Rate 50 Mbps
Regulatory Approvals MC/EM7355: FCC, PTCRB, CDG, NCC
Carrier Approvals Planned: AT&T, Verizon, Sprint, Telstra, Vodafone, NTT Docomo
USB USB 2.0 High Speed
Flash LED Output Yes
SIM Interface 1.8V or 3V
Antenna Diversity Yes
Location Solution A-GPS
Standalone GPS
Management Services No
Host OS Compatibility Windows 8
Windows 7
Device Dimensions MC: 51 x 30 x 2.75mm
EM: 42 x 30 x 2.3mm
Temperature Range -25°C to +60°C

E-Lins CPE and Devices for Wireless M2M

文章目录 : 产品文章

  1. Industrial Class Router for 2G/3G/4G Mobile Cellular networks;

H685 series – single sim

H685m series – single sim

H820 series – single sim

H700 series – dual sim single module

H720 series – dual sim dual module


2.  Industrial Class Modem for 2G/3G/4G Mobile Cellular networks;

M300 series

M400 series


3.  Wireless Backhaul AP & CPE

WAP100 series

WAP200 series

WAP300 series

Version for Industrial Class Cellular Mobile Modem

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Nowadays wireless mobile modem and serial to gateway modem become an important part of wireless M2M system.

Mobile Modems contain different version.

1. GPRS Modem – Back compatible to GSM

2. EDGE Modem – Back compatible to GPRS/GSM

3. CDMA Modem – Back compatible

4. HSDPA Modem – Back compatible to EDGE/GPRS/GSM

5. HSUPA Modem – Back compatible to HSDP/EDGE/GPRS/GSM

6. HSPA Modem – Back compatible to HSUPA/HSDPA/EDGE/GPRS/GSM

7. HSPA+ Modem – Back compatible to HSPA/HSUPA/HSDP/EDG/GPRS/GSM

8. EV-DO Modem – Back compatible to CDMA1x

9. 4G LTE modem – Back compatible to 3G/2G

Interface: RS232 or USB or RS485 or RS422 or TTL

Speed and bandwidth of networks

文章目录 : 其他

As we know, there are different types of networks for mobile networks.  Here we list the speed to compare,

GPRS Downlink 85.6 kbps, Uplink 42.8 kbps
CDMA Downlink/Uplink 153.6kbps
EDGE Downlink 236.8 kbps, Uplink 118 kbps
UMTS Downlink/Uplink 384 kbps
HSDPA Downlink 7.2 Mbps, Uplink 384k bps
HSUPA Downlink 7.2Mbps, Uplink 5.76Mbps
HSPA+ Downlink 21/42Mbps, Uplink 5.76Mbps
EVDO Rev0 2.4Mbps downlink, 153.6kbps uplink
EVDO RevA 3.1Mbps downlink, 2.4Mbps uplink
EVDO RevB 14.7Mbps downlink, 5.4Mbps uplink
TD-SCDMA 2.8Mbps
4G LTE 100Mbps downlink, 50Mbps uplink

H685 and H820 indicates Open Device Error in Web

文章目录 : 伊林思产品FAQ

Issue: in Router web, it indicates “open device error”

 Related Pictures:

 open device error

Main Cause and Solution:





Web not refreshed

Wait some seconds until the router web refresh.

Follow manual chapter “ WAN – Cellular Network” to set the “Cell Modem” to “AUTO”


the module inside the router is loosen

Open the router case, re-install the radio module


Module is failed

Contact E-Lins to order new or repair


Mobile Data Networks Understanding 2.5G vs 3G vs 4G

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Real 4G comes? Let’s understand what real 4g and fake 4g.

Some people call HSPA+ as 4G, actually there is a real definition of 4G networks.

Ever since Some carriers launched their HSPA+ 4G data services in some countries a lot of people have been saying “it’s not ‘real’ 4G”. But what is ‘real’ 4G anyway? Who decides what 4G ‘is’? Let’s look at the mobile networks that have been deployed, from GPRS 2G to 4G HSPA+.

Just to answer the question of who controls the classification “4G” – the International Telecommunications Union (ITU), a body created under the United Nations regulates the global telecommunications industry. One of the core mandates of the ITU is to establish worldwide telecommunications standards, and they determine the official classification (2G/3G/4G) of mobile data networks such as GPRS, EDGE, HSPA+, WiMAX, etc.