Explanation of terms related to DTU

Explanation of terms related to DTU

(1) What are upper computer and lower computer?

The upper computer and the lower computer are a relative concept. In communication, there is a pair of devices with a master-slave relationship. The terminal device responsible for submitting information is the lower computer, and the device responsible for processing the submitted information is the upper computer. In most cases, DTU equipment belongs to the lower-level computer, and the data center responsible for processing DTU return information is the upper-level computer. The typical application method is that multiple DTUs correspond to one data center. However, the upper computer and the lower computer do not necessarily have a one-to-one correspondence. They can be one lower computer corresponding to one or more upper computers, or one upper computer corresponding to one or more lower computers. The specific correspondence method depends on the application. Certainly.

(2) What is a data center?

The data center refers to the upper computer system that collects, summarizes and processes the information returned by the lower computer, and controls and manages the lower computer to a certain extent. It includes complete computer hardware equipment and specific complete software functions.

(3) What is fully transparent transmission?

Fully transparent transmission means that no operations or changes are made to the IP packet, but a simple sending process. In layman's terms, in fully transparent transmission, the format and content of the data before and after transmission do not change. The data received by the remote data center is the same as the data collected on site, and the data does not change during transmission. If there are any operations and changes to the IP packet, it is not completely transparent in the complete sense.