The importance of near-end crow talk in digital subscriber loops is reviewed. T h m statistical models are examined for predicting the mean and standard deviation of the NEXT interference power from n dit+ turbers. The Bradley model is selected as being most accurate with moderate computational complexity. A a set of measurements on multipair cable to obtain model parameters is described. Crosstalk coupling on 26 gauge cable is found to vary with f l . ' , have mean at 80 kHz equal to -93.7 dB and standard d e viation of 11.5 dB. The distribution of the loss in dB across pairs of disturbers is Gawsian. The model is applicable when comparing line codes for the digital subscriber loop.
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