Digital distribution frames, also known as high-frequency distribution frames, are organized by systems such as 8-system, 10-system, 16-system, and 20-system. They are increasingly advantageous in digital communication, allowing the streamlining of digital signal connections. The DDF can accommodate input and output signal rates ranging from 2 Mb/s to 155 Mb/s, providing significant flexibility and convenience for distribution, line adjustment, switching, and capacity expansion.
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