• Crosstalk is the measure of noise induced to one pair by another pair of conductors. Crosstalk measured from the near end is "NEXT" and Crosstalk measured from the far end is "FEXT". Crosstalk is expressed in dB and the smaller the number, the greater the inductive noise effect. ANSI/TIA/EIA-568-B.2 requires bidirectional NEXT measurements to verify performance in both directions.