The difference between 4G router and 4G DTU

 

4G industrial wireless router and 4G DTU, both are also used for transparent transmission of industrial equipment wireless network data. But there are also significant differences between the two, and the difference between the two is mainly distinguished from three aspects: appearance interface, usage method and application environment.

 

1. Appearance interface The appearance interface of a 4G router usually has a network port, which provides wireless networking functions for the network port device. The data transmission can be completed only by the network port device actively accessing the center. Usually 4G router routers will provide multiple network interface methods such as WAN port, LAN or freely switchable WAN/LAN port. You can customize the matching interface method according to the connection method in the project.

2.  

The appearance interface of 4G DTU generally only provides serial interface networking. 4G DTU is mainly used for two-way transparent transmission between serial port data and IP data. And some projects need to use both the network port and the serial port. What should I do? In the current era of rapid technological development, 4G routers and 4G DTU functions have been integrated.

2. How to use The 4G router can convert the Ethernet and fieldbus communication protocols. You only need to set the IP address designated by the 4G router as the gateway on the terminal device. If the designated IP address (or designated IP address segment) is not set, the communication function cannot be realized. The main purpose of 4G DTU is to realize dial-up, not a gateway in the true sense. For example, after the 4G DTU is connected to the terminal device to complete the dial-up link, the 4G DTU can be used as a new network device, and the terminal device address can use this 4G DTU binding address.

3. Application environment 4G routers usually have VPN/APN functions and private network encryption. In addition, industrial 4G routers with WIFI function are suitable for outdoor WIFI wireless signal coverage projects and similar bus WIFI, shopping mall WIFI sharing projects. The 4G DTU application in the field terminal has a relatively scattered transmission distance, and the data communication rate is relatively high. Therefore, the 4G DTU real-time performance can satisfy most industrial fields and is usually used as a data acquisition and monitoring system. Such as charging pile remote monitoring system, environmental monitoring system, real-time monitoring of energy consumption, monitoring applications of dam water conservancy projects, etc.

4. terminal device data access interface

The 4G router provides a network interface for data access. The terminal device only needs to use the IP address of the 4G router network port as the gateway. The terminal device must use the designated IP address or the address in the designated IP address range. 4G Only the router can exchange data with the server host with the specified IP address or the server host in the IP address range, and the 4G router cannot communicate with all other addresses that are not set.

 

5. 4G DTU data access generally also provides a serial port or network interface, but their purpose is for dialing, not used as a gateway in the true sense, for example, the serial interface 4G DTU in the access terminal equipment After dialing is completed, 4G DTU is regarded as a new network device of the terminal device, and the address of the terminal device uses the address bound to the new network device; and the 4G DTU of the network interface is similar to the telecommunications ADSL Internet access, and generally requires the device to complete it. A dialing action.

6. The IP address used by the terminal device

 The IP address used by the terminal device using the 4G router is any IP address that can be set by yourself or an address in the IP address range, which is also different from the IP address assigned by the UIM card.

The IP address used by the terminal equipment using 4G DTU is generally the IP address assigned by the UIM card dial-up (the IP address is designated by 3A).

7. Transmission security of terminal equipment

 The terminal device using the 4G router must use the designated IP address, and any other addresses cannot communicate; after the data of the terminal device passes through the 4G router, what is transmitted using the wireless network is the encrypted content, intercepting the wireless network Generally, the transmitted data cannot be decrypted. The encrypted data can only be correctly decrypted by the designated communication server. At the same time, all data has a unique corresponding serial number and other key processing. The 4G router ensures that the terminal device data will not be replayed or replayed. hair.

There is no such restriction on the IP address used by terminal equipment using 4G DTU, so as long as the IP address can be allocated, it can communicate with the server system. After the data of the terminal equipment passes through the 4G DTU, the content transmitted using the wireless network is generally only through IP header processing, intercepting the data transmitted in the wireless network, as long as simply removing the header information, the transmitted data can be displayed; at the same time, the data is not processed accordingly, 4G DTU may cause the rebroadcast or retransmission of the wireless data. Cause the system to be abnormal, thus there is a safety hazard.