Lte 4G router is widely used, supporting 5G/4G/3G/WIFI/VPN networking mode, serial LTE cat 4 modem and wired/wireless dual backup function. At present, Lte 4G router is widely used in M2m industry in the Internet of Things industry chain, such as smart grid, smart transportation, smart home, smart finance, industrial automation, public safety, environmental protection, digital medical and other fields.
The LTE cat 4 modem is a kind of wireless terminal equipment which is specially used to convert serial port data into IP data or convert IP data into serial port data and transmit them through wireless communication network. It is widely used in meteorology, hydrology, water conservancy, geology and other industries. Although they both transmit data, there are obvious differences between them:
Lte 4G router: It usually has VPN/APN function and has private network encryption. In addition, LTE 4G router with WIFI function is suitable for outdoor WIFI wireless signal coverage projects.
The LTE cat 4 modem: the transmission distance of the field terminal is relatively scattered, and the data communication rate is relatively high, so the LTE cat 4 modem can meet the real-time requirements of most industrial fields, and is usually used as a data acquisition and monitoring system. For example, remote monitoring system of charging piles, environmental monitoring system, real-time monitoring of energy consumption, monitoring application of dam water conservancy projects, etc.
Lte 4G router: Ethernet and fieldbus communication protocols can be converted, and only the IP address designated by the 4G router needs to be set in the terminal equipment as the gateway. If the specified IP address (or the specified IP address segment) is not set, the communication function cannot be realized.
The LTE cat 4 modem is mainly used for dial-up, not a gateway in the true sense. For example, the LTE cat 4 modem can be used as a new network device after the access terminal device completes the dialing link, and the terminal device address can use the LTE cat 4 modem binding address.
Lte 4G router: The data transmission must comply with the pre-set provisions, otherwise it will not be able to communicate correctly, reducing the possibility of unnecessary network traffic; At the same time, it can ensure that the server data will not be replayed or retransmitted according to the sent sequence number and other key processing.
LTE cat 4 modem: There is no relevant filtering during data transmission, so other machines can directly send some illegal information to the device terminal through the network. At the same time, LTE cat 4 modem increases unnecessary network traffic. At the same time, the data is not processed correspondingly, which may lead to the rebroadcast or retransmission of wireless data and the abnormality of the system.Thus, there are potential safety hazards.
Lte 4G router: The appearance interface usually has a network port, which provides the network port device with wireless networking function, and the data transmission can only be completed by the network port device actively accessing the center. Generally, Lte 4G router will provide multiple network interface modes of WAN port, LAN or WAN/LAN port with free switching. You can customize the mode to complete the matching interface according to the connection mode in the project.
The appearance interface of the LTE cat 4 modem generally only provides the serial interface networking mode. The LTE cat 4 modem is mainly used for bidirectional transmission between serial port data and IP data. And some projects need to use both network ports and serial ports. What should we do? Lte 4G router and LTE cat 4 modem functions have been integrated in the current era of rapid technological development.
Lte 4G router: one network interface is provided for data access. The terminal device only needs to use the IP address of the Lte 4G router network port as the gateway. The terminal device must use the specified IP address or the address in the specified IP address segment. Lte 4G router can exchange data with the server host of the specified IP address or the server host in the IP address segment.Lte 4G router cannot communicate with all other addresses that are not configured.
The LTE cat 4 modem: Data access is generally provided with a serial port or network interface, but they are used for dialing, not as a gateway in the true sense. For example, after the LTE cat 4 modem with a serial interface completes dialing in the access terminal device, The LTE cat 4 modem acts as a new network device for the end device,The address of the terminal device uses the address bound by the new network device; The LTE cat 4 modem of the network interface is similar to the telecom ADSL Internet access, which generally requires the device to complete a dialing action.
Lte 4G router: The IP address used by the terminal device using the LTE 4G router is any IP address that can be set by itself or the address in the IP address segment, which is also different from the IP address allocated by the UIM card.
LTE cat 4 modem: The IP address used by the terminal device using the LTE cat 4 modem is generally the IP address allocated by the UIM card (the IP address is specified by 3A).
Lte 4G router: The terminal device using the LTE 4G router must use the specified IP address, and no other address is allowed for communication; After the data of the terminal device passes through the Lte 4G router, the encrypted content is transmitted by using the wireless network, and the intercepted data transmitted in the wireless network generally cannot be decrypted.The encrypted data can only be correctly decrypted by the specified communication server; At the same time, all data has a unique corresponding serial number and other key processing. Lte 4G router ensures that the data of the terminal device will not be replayed or retransmitted.
LTE cat 4 modem: There is no such restriction on the IP address used by the terminal device using the LTE cat 4 modem. Therefore, as long as the IP address can be allocated, it can communicate with the server system. After the data of the terminal device passes through the LTE cat4 modem, Content that is transmitted using a wireless network is typically only processed by the IP header,Intercepting the data transmitted in the wireless network, the transmitted data can be displayed by simply removing the header information; At the same time, if the data is not processed accordingly, the LTE cat 4 modem may cause the replay or retransmission of wireless data, which will lead to the abnormality of the system, thus there is a security risk.
Lte 4G router: The data exchange using the LTE 4G router uses the secure tunnel established between the wireless router and the communication server. All data exchange can only be end-to-end (terminal device), and any other end-to-end data cannot be effectively communicated. That is to say, the wireless network provider cannot enter any system at both ends of the communication.
The LTE cat 4 modem: data exchange using the LTE cat 4 modem uses the internal data exchange process of the wireless network provider, allowing the wireless network provider to easily access any system at both ends of the communication.
Lte 4G router can compress large data packets before transmission, thus reducing network traffic, increasing network bandwidth, and improving the efficiency of data transmission (except for pictures and images with high compression ratio). The LTE cat 4 modem generally does not compress the data during data transmission.
So the central server must be equipped with a host for the LTE 4G router to communicate with, and the data exchanged by all devices must be encrypted, decrypted, verified, and routed by it. The LTE cat 4 modem is used to connect directly to the central server without other intermediate servers.
Both LTE 4G router and LTE cat 4 modem are devices used in the Internet of Things industry for wireless network data transmission of industrial equipment.In terms of data transmission, each has its own advantages. For example, LTE 4G router has great advantages in the transmission of surveillance video, while LTE cat 4 modem has its own advantages in the areas where the transmission distance is relatively scattered and the data communication rate is relatively high.
