dtu is often used to exchange data and programs with other computers

dtu is a modem in the world, and it is affectionately called "cat", which is an electronic device that can realize the modulation and demodulation functions required for communication. It generally consists of a modulator and a demodulator. At the sending end, the digital signal generated by the computer serial port is modulated into an analog signal that can be transmitted through the telephone line; at the receiving end, the DTU converts the analog signal input into the computer into a corresponding digital signal and sends it to the computer interface.

In personal computers, dtu is often used to exchange data and programs with other computers, and to access online information service programs, etc. In the use of industrial projects, the main function is to transfer the data information 4G/Cat-1/NB DTU of the remote equipment back to the cloud platform software system in the form of wired/wireless network. If the long-distance transmission of data information is to be realized, a complete set of data transmission system must be constructed.
The role of dtu

The main function of dtu is the conversion of analog signals and digital signals; modulation is the process of modulating digital signals from the Internet to convert digital signals into analog signals and transmit them in analog; demodulation is to demodulate analog signals and convert them into The digital signal is then sent to the computer.

When you want to connect your computer to the Internet through a telephone line, you must use dtu to translate two different signals. After connecting to the Internet, when the PC sends information to the Internet, because the telephone line transmits analog signals, GPRS DTU it is necessary to use dtu to translate the digital signals into analog signals before transmitting them to the Internet. This process is called modulation. When the PC obtains information from the Internet, since the information transmitted from the Internet through the telephone line is all analog signals, the PC must use the translation of dtu if it wants to understand them. This process is called demodulation.