Our DDF is used as a connecting panel for signals of 2 Mb/s, 8 Mb/s, 34 Mb/s, 140 Mb/s, 155 Mb/s. It provides a smooth flow of signals. It is an easy interconnecting device for digital streams between lower order and higher order digital multiplexing equipment and vice versa. It provides looping of streams and cross connecting one or more streams with patch chords thus testing and monitoring the signals without interrupting the normal communication link. We manufacture DDF in sizes of 2750mm and 2250 mm (as per customers requirements) with 8 DDM.