Modem is a device that converts analog signals into digital signals and sends them through serial port or network. It is widely used in meteorology, hydrology, water conservancy, geology and other fields. Both 4G LTE modems and gateways are devices that interconnect different networks, but they work in slightly different ways.
The 4G LTE modem is usually used in wireless remote monitoring, data acquisition and other fields to realize data transmission between devices in the form of relay stations. The 4G LTE modem can transmit data to a server or a computer through GPRS, 3G, 4G and other mobile communication networks or fixed network access.
In agriculture, environmental monitoring, electric power, water conservancy and other industries, 4G LTE modem is often used to collect a large number of scattered data and bring them together. Because 4G LTE modem can make up for the inconvenience caused by distance and installation difficulty, it plays an important role in many application scenarios.
The 4G LTE modem and the gateway are both devices that connect different networks. The gateway is usually used to convert data between different protocols and transmit digital quantities of different protocols, such as controlling Modbus RTU devices through RS232/RS485 serial ports and connecting them to Ethernet.The main function of 4G LTE modem is to complete the collection and arrangement of analog quantity, the transmission of digital quantity and the data transmission of remote system, which involves the characteristics of complex data structure and strong portability, so attention should be paid to the selection of their respective application scenarios in use.
The hardware of 4G LTE modem is mainly composed of CPU control module, wireless communication module and power module. Its advantages are quick and flexible configuration, short construction period and low cost. It can be connected to the Internet with wide coverage, good confidentiality, always online support for links, charging according to traffic, and low cost for users.
The 4G LTE modem is mainly used for wireless transmission of data. Through long-distance wireless data transmission, 4G LTE modem greatly increases the transmission distance of industrial equipment, making long-distance transmission and management of equipment possible.
The 4G LTE modem works by interfacing to a terminal device to obtain data and transmitting the data by radio over the operator's network (2G/3G/4G) to a designated data center or device.At the same time, the reverse data center can also send data or instructions to the 4G LTE modem through the operator network, and then the 4G LTE modem can send data or instructions to the terminal device through the interface.
According to the communication mode, 4G LTE modem usually adopts LTE CAT 1 / LTE CAT 4 / LTE CAT M / LoRa / WiFi and other communication modes. Customers can choose the best communication mode according to the application scenario. According to the classification of interface types, 4G LTE modem usually supports RS485, RS232 and I/O interfaces. Customers can choose the appropriate interface type according to the front-end acquisition equipment.In addition, there is an embedded 4G LTE modem, which is functionally similar to the general 4G LTE modem. The main difference is that there is no shell, and it is an embeddable motherboard that customers can integrate into their front-end integrated devices.
4G LTE modem has been widely used in power engineering, hydraulic engineering, environmental protection, climate, transportation, freight logistics, industrial production and other industries. It provides assistance for the integration of information and industrial chains among various industries, and gradually develops into a key technology for the application of the Internet of Things.
In practical applications, the 4G LTE modem is usually used for wireless data transmission. Its function is mainly to transmit data wirelessly over a long distance. The objects of transmission are devices and data centers or devices. The existence of 4G LTE modem has greatly increased the transmission distance of industrial equipment, enabling equipment to be transmitted and managed over long distances.
To sum up, 4G LTE modem technology, as a key technology in the field of the Internet of things, has a wide range of application scenarios and can provide help for the integration of information and industrial chains among various industries.
