Digital distribution frame is also called high-frequency distribution frame. With the system as the unit, there are 8 systems, 10 systems, 16 systems, 20 systems, etc. It has more and more advantages in digital communication. It can make the digital code of digital communication equipment The flow connection becomes a whole. The input and output of signals from 2 Mb/s to 155 Mb/s can be terminated on the DDF frame, which brings great benefits to wiring, wire adjustment, switching, and capacity expansion. Flexibility and convenience.