DDF is the distribution equipment used between digital multiplexers, between digital multiplexer and exchange equipment or non voice service equipment, carrying out such functions as cables connection, cable patching and test of loops that transmitting digital signals.

All parameters and performance indexes of 75 ohm MPX 272 and 120ohm MPX 286 series DDF complies with YD/T779-1999 Digital Distribution Frame.

Working conditions:

Working temperature: -5℃~+40℃
Relative humidity: ≤85% (+30℃)
Atmospheric pressure: 70kPa~106kPa
Storage temperature: -25℃~+55℃