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The detailed difference between 4G industrial router...   4G industrial router and 4G DTU both realize the wireless network data transmission function, and the differences between them are mainly from the use method, appearance interface and application environment, etc. Today, we will introduce some differences between 4G router and 4G DTU.   Different methods...

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Application analysis of iot sensing technology   The Internet of things (iot) is widely used in the integration of networks through intelligent perception, recognition technology, pervasive computing and other communication perception technologies. The iot is understood as "Internet connected by things". The Internet of things (iot) connects all objects with...

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What is a single/dual frequency wireless 4G router 1. Introduction to "single frequency" router The single-frequency router only works in the 2.4ghz band, which is generally supported by wireless terminals. However, the 2.4ghz band has large interference, which may affect the wireless rate and stability.   2. Introduction to "dual-frequency" router Dual-frequency...

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Wireless communication DTU features Data Transfer unit (DTU) is a wireless terminal device specially used to convert serial Data into IP Data or convert IP Data into serial Data for transmission through wireless communication network.   DTU advantages: Rapid and flexible network, short construction cycle, low cost; Wide network coverage; Good...

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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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The difference between 4G router and 4G DTU

文章目录 : 技术相关

4G industrial wireless router and 4G DTU are also used for wireless network data transmission of industrial equipment. But there are also significant differences between the two, and the differences between the two are mainly from the appearance of the interface, the use of methods and the application environment.

 

1. Appearance interface the appearance interface of 4G router usually has a network port, which provides wireless networking functions for the network port devices and requires the network port devices to actively access the center to complete data transmission. In general, 4G router will provide a variety of network interface modes of WAN port, LAN or freely switched WAN/LAN port, which can be customized to match the interface according to the connection mode in the project.

 

The external interface of 4G DTU generally only provides the networking mode of serial port interface. 4G DTU is mainly used for two-way transmission between serial port data and IP data. And some projects need to use both the network port, but also need to use the serial port how to do? In the current era of rapid technological development, 4G router and 4G DTU function have been integrated.

 

2. Methods 4G router can be used to convert Ethernet and fieldbus communication protocols. Only the IP address specified by 4G router needs to be set in the terminal device as the gateway. If the specified IP address (or the specified IP address segment) is not set, the communication function cannot be implemented. The primary purpose of 4G DTU is to achieve dial-up, not gateway in the real sense. For example, 4G DTU can be used as a new network device after dialing into the terminal device, and the terminal device address can use this 4G DTU binding address.

 

3. 4G router in the application environment usually has VPN/APN function and private network encryption. In addition, industrial 4G router with WIFI function is suitable for outdoor WIFI wireless signal coverage projects and similar public transport WIFI and mall WIFI sharing projects. However, 4G DTU is applied in the field terminal with scattered transmission distance and high data communication rate, so the real-time performance of 4G DTU can meet the requirements of most industrial fields and is usually used for data acquisition and monitoring system. Such as charging pile remote monitoring system, environmental monitoring system, real-time monitoring of energy consumption, dam water conservancy project monitoring application.

 

4. Data access interface of terminal equipment

4 g router provides one network interface of data access, terminal equipment needs only the IP address of the mouth to the 4 g router in the network as a gateway to the IP address of the terminal device must use specified or specify the IP address in the address period, 4 g router to specify the server hostname or IP address of the IP address of the server host for data exchange, and all the other 4 g router is not set between the address of the can’t communicate.

 

5. 4 g DTU data access generally also provides a serial port or network interface, but their use is used to dial, not used to do in the true sense of the gateway, such as serial interface 4 g DTU after completion of the access terminal dial-up, 4 g DTU as terminal equipment of a new network equipment, terminal equipment address using the new network equipment binding address; The 4G DTU of the network interface is similar to the ADSL of telecommunications, which requires the device to complete a dial-up action.

 

6. IP address used by the terminal device

The IP address used by terminal devices using 4G routers is any IP address that can be set by itself or in the IP address segment, which is also different from the IP address assigned by the UIM card.

The IP address used by terminal devices using 4G DTU is generally the IP address assigned by UIM card dialing (which is specified by 3A).

 

7. Transmission security of terminal equipment

Terminal devices using 4G routers must use the specified IP address, and any other address cannot communicate. After the data of the terminal device passes through the 4G router, the content transmitted through the wireless network is encrypted. Generally, the data transmitted in the intercepted wireless network cannot be decrypted, and the encrypted data can only be decrypted correctly by the designated communication server. At the same time, there is a unique corresponding serial number and other key processing for all data. 4G router guarantees that the terminal device data will not be replayed or resent.

Using 4 g DTU terminal device using IP address would not have such restrictions, so just can assign IP addresses can and to communicate with the server system, terminal equipment data after 4 g DTU, use the wireless network to transmit the contents of the general only through IP head processing, intercept wireless network transmission of data simply remove header information can speak transmission data display; At the same time, the data are not processed accordingly. 4G DTU may lead to the replay or retransmission of wireless data, which will lead to abnormal system, thus causing potential security risks.

 

8. Wireless access security

Using 4 g router data exchange is using a wireless router and communication between the server to establish the safety of the tunnel, all of the data exchange can be to end (terminal) to end (server), and any other middle to end data are cannot communicate effectively, that is to say, at the ends of the wireless network provider will not be able to enter any system.

4G DTU data exchange USES the data exchange process within the wireless network provider, which enables the wireless network provider to easily access any system at both ends of the communication.

 

9. Anti-interference of terminal equipment

Core system USES 4 g router is embedded operating system, only can use very little data port, and the relationship between the terminal equipment is only a routing, so terminal equipment cannot reach the other end, even not be able to access other terminal equipment of the same type, even if there is a terminal device is controlled by a virus or by an outsider, is only affect the a terminal device, the other is not affected.

Terminal devices using 4G DTU are related to 4G DTU and can easily access other terminal devices. If one terminal device is controlled by a virus or an outsider, all terminal devices and the central server system will be seriously threatened.

 

10. Equipment status monitoring

4G router can monitor the status at the same time, and basically know where the problem is and the corresponding solutions through log information.

When using 4G DTU, the status monitoring cannot be carried out, so when encountering problems, it will take much trouble or trouble to check.

 

11. server network routing Settings

When using 4G router to access the terminal device, it is necessary to add a 4G router from the server to the terminal device and use the communication server as the gateway, thus reducing the complexity of the network.

When using 4G DTU to access the terminal device in the server, it is to add a route to the terminal device in the server with the access interface of the wireless network provider as the gateway (or related route).

 

12. Anti-interference of server network

When using 4G router, the data transmission must conform to the preset regulations, otherwise, the communication cannot be carried out correctly, reducing the possibility of unnecessary network traffic. At the same time, according to the sent serial number and other key processing, to ensure that the server data will not be replay or resend.

4G DTU does not carry out relevant filtering during data transmission, so other machines can directly send some illegal information to the device terminal through the network. Meanwhile, 4G DTU increases unnecessary network traffic. At the same time, the data is not processed accordingly, which may lead to the replay or retransmission of wireless data, which will lead to the abnormal system, thus causing security risks.

 

13. Data compression and transmission

4G routers can compress large packets before transmitting, thus reducing network traffic, increasing network bandwidth and improving data transmission efficiency (except for images and images with high compression ratio).

4G DTU generally does not compress data during data transmission.

 

14. Processing of exchange data

Communication server is the core of 4G router, so there must be one host installed on the center server side for 4G router to communicate with. All data exchanged between devices must be encrypted, decrypted, verified and routed by it. There are no other intermediate servers in 4G DTU, but directly connect to the center server.

Characteristics and differences between RS485 and RS232

文章目录 : 技术相关

RS232 and RS485 have always been the weak current common interface, but there are a lot of people do not understand the difference between them is not very thorough.

 

I. overview of RS485

 

RS-485 serial bus is widely used when the communication distance is tens of meters to thousands of meters. RS-485 adopts balanced transmission and differential reception, so it has the ability to suppress common mode interference. In addition, the bus transceiver has high sensitivity and can detect voltage as low as 200mV, so the transmission signal can be recovered from kilometers away.

 

The RS-485 operates in a semi-duplex mode, with only one point in the sending state at any time. Therefore, the sending circuit must be controlled by the enabling signal.

 

II. Features of RS485

 

The RS-485 is very convenient for multipoint interconnection and eliminates many signal lines. The RS-485 enables networking to form a distributed system that allows up to 32 parallel drivers and 32 receivers. In view of the shortcomings of RS-232-C, the new standard RS-485 has the following characteristics:

(1) the electrical characteristics of RS – 485: The voltage difference between the two lines ( +6V ~ +2V) represent the logic “1″, the voltage difference between the two lines (-6V ~ -2V) represent logic “0″. The interface signal level is lower than RS-232-C, so it is not easy to damage the interface circuit chip, and the level is compatible with TTL level, making it easy to connect with TTL circuit.

 

(2) The maximum data transmission rate is 10Mbps

 

(3) RS-485 interface adopts the combination of balanced driver and differential receiver, and has strong anti-common mode interference ability, that is, good anti-noise performance.

 

(4) The maximum transmission distance standard value of RS-485 interface is 4000 feet(about 1219meters), which can reach 3000 meters in fact.

 

(5) RS-232-C interface is only allowed to connect to one transceiver on the bus, that is, single station capability; The RS-485 interface is only allowed to connect up to 128 transceivers on the bus, that is, it has multi-station capability, so that users can use a single RS-485 interface to easily establish the device network.

 

III. Overview of RS232

 

The RS-232 interface conforms to the interface standard for serial data communication formulated by EIA. The original number is EIA- RS-232 (short for 232, RS232). It is widely used in computer serial interface peripheral connection. Connect cables and mechanical, electrical characteristics, signal functions and transmission processes.

 

The RS-232-C standard specifies data transfer rates of 50, 75, 100, 150, 300, 600, 1200, 2400, 4800, 9600, 19200 baud per second.

 

IV. Features of RS232

 

RS-232 is one of the main serial communication interfaces. Due to the early appearance of RS232 interface standard, it is inevitable that there are some deficiencies, mainly including the following four points:

 

(1) The interface signal level value is high, easy to damage the interface circuit chip. RS232 interface any signal line voltage is negative logic. That is, logic “1″ is -3 — -15v; Logic “0″ : +3 — +15V, noise tolerance is 2V. That is, the receiver is required to recognize the signal higher than +3V as the logical “0″, and the signal lower than -3v as the logical “1″. TTL level of 5V is the logical positive and 0 is the logical negative. It is not compatible with TTL level, so it needs to use level conversion circuit to connect with TTL circuit.

 

(2) The transmission rate is low, and the bit rate is 20Kbps in asynchronous transmission; Therefore, in 51CPLD development board, the comprehensive program baud rate can only be used 19200, which is also the reason.

 

(3) The interface USES a signal line and a signal return line to form a common ground transmission form, which is easy to generate common mode interference, so the anti-noise interference is weak.

 

(4) The transmission distance is limited. The standard value of the maximum transmission distance is 50 feet, which can only be used for about 15 meters in fact.

 

V. Application field

 

RS-232 is now commonly used in short distance transmission data rate is low, can work effectively in a noisy environment, such as factories, public site, etc., the commonly used equipment has a low-speed modem, industrial control equipment, programmable logic controller (PLC), computer numerical control (CNC) machine tools, robots, embedded control computer, medical instrument and equipment, and embedded controller development system.

 

RS-485 is commonly used in long-distance transmission with high data transmission rate. The commonly used equipment includes point-of-sale terminals (POS), measuring instruments and large specialized automatic machines.

 

But in a normal application, we often need to convert between two different interface types. At this point, we can use the popular USB interface, which can help us to switch to RS-232 interface and RS-485 interface.

 

In conclusion, RS-232 is suitable for short distance and low-speed transmission, while RS-485 is suitable for long distance transmission. RS-485 is a new interface standard aiming at the shortcomings of RS-232 interface. Because of its good anti-noise interference ability and multi-station ability, it has become the preferred standard.

What is M2M?

文章目录 : 技术相关

As is known to all, besides providing more broadband speed and quality, 5G is characterized by the application of the Internet of things (IoT) from the demand and design stage. In order to adapt to different applications, mobile communication technology with no wiring, high coverage and high reusability has become an important carrier.

 

However, there are still considerable difficulties to be solved in the communication between objects, such as how to reduce the impact of a large amount of M2M communication on existing communication networks, and how to avoid increasing the complexity of network operation and maintenance. Therefore, the development of M2M will play an extremely important role in 5G in the future. So what is M2M?

 

I. brief introduction of M2M technology

 

M2M(MachinetoMachine), is the effective control of devices through mobile communication, so as to greatly expand the boundaries of business or create a more efficient way of doing business than the traditional way or create a completely new service completely different from the traditional way. In short, M2M refers to the information exchange and transmission between machines, which achieves the concept of information sharing through the transmission and link of network and communication between machines and devices.

 

In fact, as early as 2002, the concept of M2M business has been proposed, but due to the immature communication technology, the development is still in the enlightenment stage, such as tap water, power company’s automatic meter reading and digital home application. With the rapid development of wireless communication technology, the application of M2M services into the stage of rapid development, in agriculture, industry, public security, urban management, health care, public transportation, and environmental monitoring, can see M2M applications, such as: Integration of smart energy saving, smart car, smart medical care, smart city, smart logistics and other services and applications, very dependent on M2M technology development.

 

II. Application category of M2M

 

Due to the rapid take-off of the Internet of things industry, it is more necessary to integrate the unified and standardized M2M technology. At present, a considerable number of international standards organizations have invested in the research of M2M standardization, including ITU-T, ETSI, IETF, IEEE, 3GPP, OMA, Zigbee and other alliances. According to the research direction and focus of each standard organization, M2M international standard organization can be divided into the overall architecture category, perception extension category, network extension category and business application category. The specific contents of each category are as follows:

 

Overall architecture class

 

M2M business system architecture

Conduct standardized research on M2M requirements, point-to-point architecture, identity analysis, network management and security, etc. Typical standard organizations include ITU-TSG13, ETSITC SmartM2M, OneM2M, CCSATC10, etc.

 

Perceptual extension class

 

Perception layer of M2M module market

Some low transmission rate and short distance wireless communication technologies are standardized, including short distance wireless communication technology, sensor network and telecommunication network fusion, and lightweight IPv6 technology. Typical standard organizations include IEEE802.15, IETF6LoWPAN, CCSATC10, Zigbee alliance, etc.

 

Network communication

 

M2M network communication

The transformation and optimization of M2M hosted network are carried out. Related technologies include the increase of wireless connection network, core network enhancement, environmental awareness, heterogeneous network fusion, etc. Typical standard organizations include itu-t, 3GPP, CCSATC5, IETF, ETSI, etc.

 

Business application class

 

Standardized for enterprise application, public application, cross-enterprise application and application intermediary software platform, the key application fields include smart transportation, smart home, smart power grid, health care, etc. Typical standard organizations include IETF, CCSATS10, ETSI, OGC, etc.

 

III. Industrial application of M2M

 

In the field of application, M2M module technology often combines the sensor to collect information, and through the sensor’s exploration of the unknown environment, the obtained information is transmitted to the device or device, and the available information has been analyzed. In the industry, real-time feedback information can be collected to ensure the quality of products and avoid the failure of equipment parts. According to the desired purpose, the information needed will be probed to improve the accuracy and safety of people’s lives.

 

For example, M2M combined with sensors, applied in industrial process monitoring, can help the machine reduce downtime and timely diagnose potential problems, and provide timely notification and warning in case of failure before affecting the operation of the machine. Improve machine efficiency by monitoring machine performance and making appropriate adjustments. It is also about reducing maintenance costs and increasing the number of devices produced, because you know and react immediately, and you can access information, communicate and calculate at any time.

 

In the factory production process and automation process maintenance, is an indispensable role. Because most of the machines in the factory will inevitably encounter the possibility of defects and loose falls, the process monitoring and adjustment to avoid the machine, because of the loose falls and reduce productivity. Knowledge of information can be gathered through instant messaging in return, and data can be retroactive through access and file creation to facilitate the life cycle of machines and products.

 

IV. Differences between M2M and the Internet of things

 

M2M is a point, or a line. Only when M2M is scaled and popularized, and intelligent integration and communication are realized between each other through the network, can the “Internet of things” be formed. Therefore, the scattered and isolated M2M is not the Internet of things, but the ultimate goal of M2M is the Internet of things. Communication show this year, there are a lot of M2M applications and display, such as China mobile phone wallet and mobile phone power purchase business, China telecom’s “silent e” business, and China unicom “wireless environmental testing platform” business, belong to M2M applications, you can say it is to belong to the category of the concept of Internet of things, but is not the Internet of things. Therefore, to realize the real Internet of things, it needs massive addresses, massive bandwidth and massive storage, as well as extremely high communication intelligence and management intelligence, as well as very perfect regulatory regulations to ensure the feasibility of business.

 

Looking at the current development of M2M, with the development of science and technology, it can be expected that more and more devices have the ability to communicate and network, realize the application of environmental monitoring, environmental analysis and so on, and create Internet of things business opportunities. M2M and the Internet of things will be the focus and direction of future industry development, it will completely change the work and lifestyle of the whole society, the Internet of things is not a dream!

The similarities and differences between industrial 4G router and industrial switch

文章目录 : 技术相关

1. definition of industrial 4G router and industrial switch

 

Industrial 4G router:

 

Industrial 4G router is a network device responsible for path finding. It provides users with communication by finding the least communication from multiple paths in the interconnection network. Industrial 4G router has two typical functions: data channel function and control function. The functions of data channel include forwarding decision, backplane forwarding and output link scheduling, etc. The control function is usually implemented by software, including information exchange, system configuration and system management between the router and the neighboring industry 4G router. Industrial 4G routers are used to connect multiple logically separate networks. The industrial 4G router USES the routing table to select the path for data transmission. The routing table contains the list of network addresses and the distance between each address. The industrial 4G router USES the routing table to find the correct path of the packet from the current location to the destination address. The industrial 4G router USES the least time algorithm or the optimal path algorithm to adjust the path of information transmission. If one network path fails or becomes blocked, the industrial 4G router can choose another path to ensure the normal transmission of information. Industrial 4G routers can convert data formats and become necessary devices for network interconnection between different protocols.

 

Industrial 4G routers use path searching protocol to obtain network information, and use path searching algorithm and criterion based on “path searching matrix” to select the optimal path. According to the OSI reference model, an industrial 4G router is a network layer system. Industrial 4G routers are divided into single-protocol industrial 4G router and multi-protocol industrial 4G router.

 

The Internet is made up of a variety of networks, of which industrial 4G routers are a very important part. Intranet to be incorporated into the Internet and serve as Internet service, industrial 4G router is an indispensable component, and the configuration of industrial 4G router is also relatively complex.

 

Industrial Switch:

 

Industrial switch is a device that expands the network and provides more connection ports for the sub-network to connect more computers. With the development of the communications industry and the advancement of the informatization of the national economy, the network exchange market has been rising steadily. It features high cost ratio, high flexibility, relatively simple and easy to implement. Therefore, Ethernet technology has become the most important LAN networking technology, network switch has become the most popular switch. The switch can be recognized based on MAC address, and can complete the function of packaging and forwarding packet network equipment. An industrial switch can “learn” the MAC address and store it in the internal address table, enabling the data frame to go directly from the source address to the destination address by establishing a temporary switching path between the originator of the data frame and the target receiver. If the network utilization is over 40% and the collision rate is over 10%, the industrial switch can help you solve a few problems. Industrial switches with 100Mbps fast Ethernet and 10Mbps Ethernet ports can run in full duplex mode and can establish dedicated 20Mbps to 200Mbps connections.

 

2. Similarities and differences between industrial 4G routers and industrial switches

 

Similarity

 

(1) “exchange” is a word with a wide range of meanings. When it is used to describe the devices in the second layer of data network, it actually refers to a bridging device; When it is used to describe the third layer of the data network, it refers to a routing device. That is, both industrial switches and industrial 4G routers can be used to exchange network devices, but at different levels.

 

(2) Internet access. It’s all about extending the network.

 

Differences

 

(1) The first industrial switch worked at the OSI/RM open architecture’s data link layer (layer 2), while the industrial 4G router was initially designed to work at the OSI model’s network layer. Since the industrial switch works at the OSI layer 2 (data link layer), it works simpler, while the industrial 4G router works at the OSI layer 3 (network layer), which yields more protocol information, and the industrial 4G router makes smarter forwarding decisions.

 

(2) different industrial switches based on different objects for data forwarding use physical address or MAC address to determine the destination address for data forwarding. Industrial 4G routers, on the other hand, use the ID Numbers (i.e. IP addresses) of different networks to determine the addresses for data forwarding. IP addresses are implemented in software that describe the network on which the device is located, and sometimes these third-tier addresses are also known as protocol addresses or network addresses. MAC addresses are typically hardware-owned, assigned by network card manufacturers, and have been solidified into network CARDS, which are generally immutable. IP addresses are usually assigned automatically by the network administrator or the system.

 

(3) traditional industrial switches can only divide the conflict domain and cannot divide the broadcast domain. Industrial 4G routers can segment broadcast domains. A network segment connected by an industrial switch still belongs to the same broadcast domain, and broadcast packets are spread across all network segments connected by an industrial switch, in some cases leading to communications advocacy and security vulnerabilities. Network segments connected to industrial 4G routers are assigned different broadcast domains, and broadcast data does not pass through industrial 4G routers.

 

Although the industrial switch above the third layer has VLAN function and can divide the broadcast domain, the communication between sub-broadcast domains is not possible, and the communication between them still needs the industrial 4G router.

 

(4) industrial 4G routers provide firewall services, which only forward packets of specific addresses, do not transmit packets that do not support routing protocol, and the transmission of target network packets for knowledge, thus preventing broadcast storms.

4g router features of E-lins Technology

文章目录 : 产品文章

With the development of new communication technologies and the continuous improvement of network efficiency and function of wireless communication, 4G has been widely used. 4G industrial-grade wireless routers are playing an increasingly important role in the applications of various industries, and the price is getting cheaper and cheaper. Currently, there are a lot of optional devices in the market, so how to choose one that can guarantee long-term use, stability and reliability, and affordable price is the problem that customers think about the most. The following is a specific selection reference for the 4G industrial wireless router of E-lins technology.

 

I. Industrial-grade design

1. Adopt high-performance industrial-grade 32-bit processor and adopt qualcomm chip, the world’s top wireless solution, with high processing speed, low power consumption, low heat output, strong compatibility and more stable, which can meet the requirement of 365 days a year, 7*24 hours long and stable operation without dropping the line.

2. Adopt high-performance industrial-grade communication module and high-quality communication module of huawei and other first-tier brands, with strong reception ability, stable signal and faster transmission.

The operating system uses OpenWRT, a highly modular, highly automated embedded Linux system, which makes the device more stable, has a large capacity of Flash and memory, and can support the requirements of customized development. High quality PCB circuit boards are manufactured with high quality materials and high standard. Stable industrial components are used for product components. All the machines are automated to realize patch production, ensuring the stability and reliability of the products. The power supply adopts wide voltage design to support dc5v-40v, with built-in anti-phase protection and over-voltage and over-current protection of the power supply, which can withstand the impact of instantaneous high voltage and current. Ethernet USES gigabit network port, built-in electromagnetic protection Ethernet interface built-in 1.5kv electromagnetic isolation protection, gigabit network port, faster transmission speed. The shell with strong anti-interference ability adopts thickened metal shell, shielding electromagnetic interference, and the equipment protection grade IP34, which is suitable for use in harsh industrial environment.

 

II. Powerful function

 

Multi-mode multi-card, load balancing

Expand network equipment and server bandwidth, increase throughput, enhance network data processing capacity, and improve network flexibility and availability.

 

Support global network formats

Support 2G, 3G and 4G networks of the three major domestic operators, or support Europe, southeast Asia, Africa, Latin America and other countries.

 

Support wired wireless backup

WAN port and LAN port can be flexibly switched to support wired and wireless backup of WAN port, with wired priority and wireless backup.

 

Serial transmission

Support simultaneous RS 232/485 serial port transmission.

 

Support APN/VPDN special network card, support a variety of VPN support APN/VPDN special network card use, at the same time support PPTP, L2TP, Ipsec, OpenVPN, GRE and other VPN.

 

Powerful WIFI function

WIFI supports 802.11b/g/n, WIFI AP, AP Client, repeater, relay bridge, WDS and other working modes, 802.11ac, or 5.8g (optional).

 

Support IP penetration function can achieve the IP address of the host IP obtained for the router, which is equivalent to the host directly plugging in the card to dial up the Internet to obtain the IP of the base station.

 

VLAN virtual LAN division through the division of VLAN, enhance the security of the LAN, VLAN technology, can be different locations, different networks, different users together, forming a virtual network environment. Support QOS, bandwidth speed limit support different network port bandwidth speed limit, IP speed limit, total bandwidth speed limit. Support DHCP, DDNS, firewalls, NAT and the function such as DMZ host support ICMP, TCP, UDP, Telnet, FTP, HTTP, HTTPS and network protocol support time to restart, SMS control, GPS/beidou positioning function (optional), support M2M cloud platform management, mobile monitoring and WEB monitoring, device data monitoring, traffic limit function, push resources, statistics, the remote device management (remote restart, WiFi switch), remote parameter modification, traffic restrictions, GPS tracking trajectory.

 

III. stable and reliable

1. Support hardware WDT watchdog, provide anti-dropping mechanism, and ensure that the data terminal is always online.

2. Support ICMP detection and traffic detection, automatically restart the equipment if network abnormality is found in time to ensure the stability and reliability of the system in long-term use.

3. Industrial-grade design, metal shell, anti-interference, anti-radiation, 95% humidity, no condensation, high temperature and low temperature resistance, minus 30 degrees to 75 degrees high temperature can work normally.

4. Our products have passed CCC certification, European CE certification and other certifications

 

Simple operation, easy to use

1. Simple Internet access, push-stick user card interface, insert mobile phone card/Internet of things card/special network card, and you can use the network port and WIFI after power on.

2. Support software and hardware to restore factory Settings, software can clear parameters, hardware RST one-key to restore factory Settings.

3. Product quick operation manual, WEB menu-type page, can quickly set up the device for use.

4. Diagnostic tools: log download and view, remote log record, ping detection, route tracking, easy to detect device information.

E-Lins Industrial router applications

文章目录 : 技术相关

Industrial-grade routers as Internet network layer communication equipment application in all walks of life, brought a lot of convenience for our industry. “E-Lins” introduce the application of industrial router scenario analysis.

 

1 The self-service terminal network

 

E-lins industrial router networking facilitates the wireless networking and remote management of self-service terminals. Operations can be self-service equipment such as self-help harvest home, machines, payment terminal layout to any area of the wireless network coverage, such as shopping malls, neighborhood, community, etc., a substantial increase in business volume.

 

2 The smart grid remote video monitoring

 

Remote video monitoring system has been widely used in intelligent monitoring of transmission lines. The system carries out remote real-time video monitoring of transmission lines, towers and transmission substation of transmission lines. The collected real-time video image information can be transmitted to the management center through the link of industrial wireless router. Real-time monitoring of transmission line state, enhance the level of the lean production management.

 

3 Management of public bicycle in traffic areas

 

Public bike rental system includes management center, customer service sites, bike rental sites of three parts. Industrial router applications in the center of the management of communication management system, through the network operators, box rental management system with the background data forwarding, intelligent parking system and settlement system of data transmission, transfer, and the data transmission function with the other application systems.

 

4 Remote audio-video monitoring of driver’s license test

 

In order to effectively prevent accidents, control the source of safety management and regulate the driver’s license examination, the traffic management bureau of the ministry of public security has been successively implemented in various places to strengthen the management guidance of motor vehicle drivers. Cameras are installed on the driver’s license examination vehicles, and connected with the rear platform through 4G industrial router. The subjects of the driver’s test of automobiles are subject to video and audio monitoring. Print 3 randomly captured test photos on the test report card of each subject, and the test video will be kept for more than 1 year.

 

5 WIFI bus

 

WIFI bus is an important part of wisdom city. Routers through 4 g in the car industry, will be on the way of the 3 g / 4 g mobile communication base station emission signal into stable quality of network signals (such as wi-fi signals), micro letter can easily meet car passengers chat, on QQ, local news, download the APP and other mobile Internet lifestyle. Can fully support all the bus company and scheduling, scheduling, statistical analysis and other business needs; Can also support the bus video image transmission of the monitoring system, once the vehicle accident or emergency, video monitoring system can start immediately, will video transmission to the rear of the console for emergency response and scheduling platform center.

 

6 Intelligent express delivery cabinet

 

The intelligent express delivery cabinet connects and interacts with the central management platform via the operator’s 3G/4G wireless network through wireless router to realize remote management and monitoring. And through the VPN and VPDN, realize the security of the data transmission. Send and receive express real-time, liberate the workforce, the center server for data processing and integration, realizing data sharing, in order to ensure real-time and efficient express business. Real time control of the terminal all express ark centralized remote management, operation condition, reduce operating costs, improve service quality.

 

7 Equipment remote monitoring

 

Using 4 g industrial router to establish a system of numerical control machine tool remote fault diagnosis is to CNC machine tool fault diagnosis technology and the INTERNET of wireless communication technology, the combination of establishing monitoring on nc machine tools, its running status data, and in the center of the enterprise local area network and the INTERNET to establish expert diagnosis and analysis of CNC machine running status diagnosis. It can make fault diagnosis is more flexible and convenient, and can effectively improve the diagnostic accuracy and work efficiency, reduce maintenance time.

 

The industrial wireless router has become a magical device in the field of Internet of things M2M due to its fast transmission rate and strong stability.

Classification of 4G industrial routers

文章目录 : 技术相关

There are many types of 4G industrial routers, which can be divided into different categories from different perspectives. Different types of 4G industrial routers can be used in different environments. The following sections classify the 4G industrial routers from different perspectives.

According to the performance

From the perspective of performance, 4G industrial routers can be divided into linear router and non-linear router.

The so-called wire speed router can transmit freely according to the transmission medium bandwidth, basically without discontinuity and delay. The specific calculation method is the same as that of the switch line speed backplane bandwidth. A wire-speed router is a high-end router with very high port bandwidth and data forwarding capability that forwards packets at the media rate.

Non-wire-speed routers are mid – to low-end routers, but some new wire-access routers also have wire-speed capabilities. The performance of router is mainly affected by CPU performance. If the CPU performance is high, the 4G industrial router is more likely to be a high-performing wire-speed router.

Speed is generally not a measure of a router, and data throughput is one of the references used to measure a router’s maximum data throughput. The routers with the capacity of the rear plates of 4G industrial routers greater than 40Gbps are called high-grade routers. The routers with the capacity of the rear plates between 25Gbps and 40Gbps are called midrange routers, while those with the capacity lower than 25Gbps are considered as low-grade routers. This kind of dividing way is not so absolute, specific parameter needs to make distinguishing according to each manufacturer specific parameter.

According to the structure of the points

The 4G industrial router can be divided into modular router and non-modular router according to the structure Angle.

Modular routing generally only provides basic routing function when leaving the factory. Its interface type and partial extension function are configured according to the actual needs of users. Users can choose corresponding modules according to the network type they need to connect. Different modules can also provide different connectivity and management capabilities. For example, the vast majority of modular routers allow users to choose network interfaces, VPNS, firewalls and other functions, most of which are modular routers.

Routers H685/H700/H720/H750/H820/H820Q/H820QO  from E-Lins are all modular router, can meet the requirements from all over the world.

Non-modular routers are mostly low-end routers, which are mostly used in civilian environments. Primarily used to connect small business customers within homes or isps, supporting virtual private network protocols such as SLIP, PPP, PPTP, and IPSec. These protocols to run on each port, such as ADSL will increase home broadband availability, which will increase the burden of accessing routers. In the future, such router ports will run multiple protocols while avoiding the telephone switched network.

According to the function points

The 4G industrial router is divided into general router and special router. The common civilian router is the general router, that is, the router that can normally use the routing function under the general environment, and there is no other special requirement scenario.

The special router optimizes the routing interface, hardware and so on to realize a certain function. For example, the foreign trade special router changes the local IP through the special router, which can also quickly access some foreign trade stations in China, which is more convenient.

According to the interface points

4G industrial routers can support SDH stm-1 interface, SDH stm-4 interface and SDH stm-16 interface. At present, the router supporting SDH stm-64 interface is high-end 4G industrial router. However, other interfaces are relatively weak, among which stm-1 has two types of optical interface and electrical interface. Stm-1 electrical interface is suitable for local situations where the interference signal is weak. The light interface is usually used for stm-4, stm-16 and stm-64.

according to the perspective of the object of use

The 4G industrial routers can be divided into core router (core level), distribution router (enterprise level) and access router (home level) according to the perspective of the object of use.

The core router, which is the router that forwards packets to the host computer in the network (but not between networks), is the key device to realize Interner network interconnection with other levels of routers. Often used by telecom operators or isps. The throughput of core router is larger, and the requirement of speed and reliability is higher. In order to obtain high reliability, the network system generally adopts traditional redundant technology such as hot backup, dual power supply and dual data path, so that the reliability of backbone router is not a problem.

Distributed routers are used to connect multiple logically separate networks because there are many connected objects, the system is relatively simple, and the data traffic is relatively small. In addition to connecting different networks, distribution routers also need to choose smooth and rapid short-cuts to improve the communication speed, reduce the network communication load, save system resources while improving the unimpeded rate, and maximize the benefit of the network system.

The access router is mainly used for network interconnection in the small local area network. It is often used in the case of small area and simple network environment such as home, small enterprise or net bar.

Dual SIM Router vs. Dual Radio Router

文章目录 : 技术相关

Projects are looking to save their enterprises time and money ask us this very often: “When would I need to use dual SIMs, and in what situations should I consider dual radio dual sim router?”

In order to make this clear, let’s take a quick look at the dual SIM and dual SIM dual radio module functionality.

Dual SIM

With two SIM cards inserted into one E-Lins H700/H720/H750/H900 Router, the radio still only connects to one active SIM at a time, the other SIM will work as backup link. Simply speaking, one SIM as main, the other as backup. Two SIMs will not be online at the same time.

Dual-SIM functionality allows you to switch two carriers on the fly at a store location. Let’s say you’ve configured a router and inserted two active SIMs on two different carriers into the router, then sent it into the field for deployment. The IT professional in charge of installation performs site surveys on SIM A and SIM B.

Based on the results, your installer will switch to the carrier that is providing the best network experience at that location. Then he or she can deactivate the other SIM, ensuring the company is only charged for one cellular data plan at a time.

Dual Radio Module

Dual Radio Module — accomplished with dual radio module router— allow you to connect two carriers at the same time, which provides multiple benefits, such as you can choose one carrier work as primary and the other work as secondary; SIM A work and go pass the data first, meanwhile SIM B work standby and it will switch to SIM B when SIM A link failed, which will ensure the whole cellular link always be online.

Failover / WAN Redundancy

The ability to connect to two carriers at the same time is the only way to provide cellular-to-cellular failover — which can be beneficial in many situations and is the only option for WAN link redundancy for M2M&IoT networking. The automatic switch from one carrier to the other occurs in a few seconds. Also, both radio modules can be active at the same time, allowing for more bandwidth.

At locations where wired-line connectivity is available, some end-users use dual radio to further enhance their failover by utilizing three carriers at once. For example, they might use wired-wan via xDSL and two different cellular SIMs to provide “three-nines” connectivity.

Additionally, a router with a dual radio offers additional bandwidth during high-usage times when using load balance or sim bonding feature, which two features are very often seen in dual radio dual sim router.

Let me summary the key points of when to use dual radio dual sim router for you:
1)When you want to connect two different ISP/carrier.
2)When you want to use two ISP/carrier’s cellular failover.
3)When you want to use load balance or SIM bonding to enhance your bandwidth

E-Lins Technology Co., Limited owns H700/H720/H750 3 series excellent dual radio dual sim routers which are on hot-selling worldwide, so when your cases or projects are in need of dual radio dual sim, you can freely contact with E-Lins Technology Co., Limited.

工业路由器NBMA网络转化为点到点的链路

文章目录 : 产品文章

当我们使用点到点子接口将NBMA网络转化为点到点的链路时,整个NBMA网络将产生过多的PVC部分互联或全互联的网状结构,但这将产生一定的负面影响,会使网络中产生大量的LSP泛洪流量。我们都知道,运行IS-IS的工业路由器当接收到一个LSP报文后,会将此LSP从除接收接口以外的所有启用了IS-IS协议的接口泛洪出去,以使网络中的其他工业路由器都可以接收到此LSP。但是这种泛洪机制对于存在大量部分互联或全互联的网络将产生过多冗余的LSP扩散。

所谓全互联或全网状网络拓扑,是指所有工业路由器都与其他工业级无线路由器向连接(通常是点到点子接口)。在这样的一个网络中,当一台路由器从某接口收到邻居泛洪过来的LSP后,由于它并不知道这个LSP是否已经被其他邻居工业4g路由器收到,所以会再从其他接口泛洪出去,即使其他工业级4g路由器的链路状态数据库中已经存在这个LSP。如果网络中有n个全网路由器的话,那么网络中的每台工业级LTE路由器都会扩散n-2条冗余的LSP,这样总共被泛洪的多余的LSP将为(n-1)x(n-2),条而这些LSP的扩散是多余。如果每台工业全网通路由器都刷新一条LSP的话,那么这个数量还将会成倍数的增长,导致了大量带宽资源的浪费。

为了解这种在全互联或高度互联的网络中出现的LSP泛洪的冗余现象,IS-IS提供了一种解决方案——IS-IS全通组,也称作Mesh组。IS-IS全通组在RFC2973中进行了定义。所谓全通组,就是假设所有工业3G路由器之间都是完全互联的,每个工业级全网通路由器都会直接收到其他全网通工业级路由器泛洪的原始的LSP的拷贝。

可以将全网工业路由器的接口加入到某个全通组中,一个全网通工业路由器上可以存在多个全通组,全通组内接口之间的LSP泛洪是受限制的,全通组之间的LSP泛洪是正常的操作,未加入全通组的工业级3G路由器接口与全通组之间也是正常的LSP泛洪操作。全网通路由器  无线路由器

工业路由器使用CSNP来保证链路状态数据库的完整性

文章目录 : 产品文章

在广播网络中,工业路由器使用CSNP来保证链路状态数据库的完整性,并且只有DIS才会发送工业全网通路由器CSNP报文,DIS发送CSNP报文的间隔为10s。CSNP报文中描述了DIS的链路状态数据库中所有工业级3G路由器LSP的摘要信息。当其他工业级路由器收到DIS发送的CSNP后,会使用CSNP中的LSP摘要信息与与本地的链路状态数据库中的LSP进行比较,进行比较的目的是确定本地链路状态数据库中的信息是否已经同步和完整。如果工业级4g路由器发现本地数据库中缺少某个LSP条目,那么它将使用PSNP向DIS请求这个缺少的LSP条目。这个PSNP报文中包含就是请求的LSP条目的摘要信息。当DIS收到其他全网路由器发送的PSNP报文后,将会发送一个完整的LSP报文,这个LSP就是其他工业无线路由器所缺少的LSP条目。在广播网络中,DIS使用周期性的CSNP报文向网络中发送同步链路状态数据库的信号,而其他工业4g路由器使用PSNP报文来请求缺少的LSP条目。

在IS-IS的点到点类型的网络中,链路状态数据库同步的操作与广播网络中略有不同,而且工业级全网通路由器发送CSNP与PSNP报文的方式和其作用也有一些差别。

在点到点网络中不存在DIS,工业3G路由器不会周期性的发送CSNP报文,CSNP报文只在链路链路被激活时发送一次,而且链路两端的工业级4g路由器都会发送CSNP报文以描述本地链路状态数据库中所有LSP的摘要信息。当工业路由器发送对端发送的CSNP中含有本地缺少的LSP信息时,也会使用PSNP报文向对端请求LSP。当对端收到PSNP报文后,将向请求方发送包含完整LSP信息的LSP报文,这点上与广播网络中的操作是相同的。但是在点到点链路上,收到LSP报文的工业4g路由器还会向对方再次发送一个PSNP报文以对之前收到的LSP进行确认。可以说,在点到点网络中的LSP交换是可靠的。这点与广播网络不同,在广播网络中工业级无线路由器不使用PSNP报文对收到的LSP进行确认,而是通过DIS周期性地发送CSNP报文以弥补广播网络中不可靠的LSP交换。

在点到点链路上,工业路由器使用PSNP对收到的LSP报文进行确认,所以在点到点链路上是可靠的泛洪机制。

IS-IS路由协议支持两种网络类型:广播链路和点到点链路。默认情况下,全网通工业级路由器IS-IS将广播网络和NBMA网络看作是广播类型。对于封装了PPP或HDCL等协议的链路看作是点到点类型。对于NBMA网络中的主接口和点到多点子接口,IS-IS将其看作是广播类型;对于NBMA网络中的点到点子接口,将其看作是点到点类型。IS-IS不像OSPF那样,提供了对NBMA网络(例如Frame-Relay、ATM)的专门支持。对于NBMA网络,全网通工业路由器IS-IS认为其网络拓扑是PVC全互联(mesh)的,就是把它看作广播网络。但如果实际网络拓扑中并不是PVC全互联的结构时,例如部分互联的结构和Hub-Spoke结构,推荐使用点到点类型网络,即使用点到点子接口,以免造成NBMA网络中的链路状态数据库同步出现问题。无线路由器