UTP Cable Attenuation by Brandy McNeilin Datacomm TablesFebruary 27, 2017 Frequency(MHz) Category 3(dB)Attn/NEXT Category 4(dB)Attn/NEXT Category 5(dB)Attn/NEXT 0.064 0.9/- 0.8/- 0.8/- 0.150 -/53 -/68 -/74 0.256 1.3/- 1.1/- 1.1/- 0.512 1.8/- 1.5/- 1.5/- 0.772 2.2/43 1.9/58 1.8/64 1.0 2.6/41 2.2/56 2.0/62 4.0 5.6/32 4.3/47 4.1/53 8.0 8.5/27 6.2/42 5.8/48 10.0 9.7/26 6.9/41 6.5/47 16.0 13.1/23 8.9/38 8.2/44 20.0 10.0/36 9.3/42 25.0 10.4/41 31.25 11.7/39 62.5 17.0/35 100.00 22.0/32 Attenuation: per 100 meters (328 feet) @ 20ºC NEXT: > = 100 meters (328 feet)