The Modem mentioned here is not the abbreviation of Technical University of Denmark, but the abbreviation of Data Terminal Unit. Broadly speaking, during communication, the module unit responsible for sending data information at both ends of the link for transmitting data is called Modem, which is used for format conversion and data collation and verification of the transmitted information. In a narrow sense, Modem generally refers to the lower 4G/CDMA transmitting terminal equipment in wireless communication.
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.
Modem is mainly used for wireless data transmission. Through long-distance wireless data transmission, the object of transmission is equipment and data center or equipment.
Modem connects the terminal equipment through the interface to obtain data, and then transmits it wirelessly through the operator network (2G/3G/4G) to the designated data center or equipment. At the same time, the reverse data center can also send data or instructions to the Modem through the operator network, and then the Modem sends them to the terminal equipment through the interface.
According to the classification of communication modes, Modem generally uses GPRS/4G/NB-IoT/LoRa/WiFi, etc. Customers can choose the best communication mode according to their own application scenarios. Classified by interface type, Modem generally supports RS485, RS232, I/O and other interfaces, and customers can select the appropriate interface type according to the interface of their own front-end acquisition equipment.In addition, there is an embedded Modem, which is similar to the general Modem in function. The main difference is that it has no shell and is an embedded motherboard. Customers can integrate it into their own front-end acquisition equipment.
Modem has been widely used in electric power, water conservancy, environmental protection, meteorology, transportation, logistics, industry and other fields. It provides help for the integration of information and industry among various industries, and gradually develops into the core technology of Internet of Things applications.
