this box scanner picks up all rail-fan frequencies for the aar channel 18 , 160.180 ns road on channel 1 ; aar channel 09 , 160.245 ns from dispatcher to train on channel 1 ; aar channel 48 , 160.830 ns from train to dispatcher on channel 2 ; aar channel 11 , 160.275 ns pbx between the city of huntsville and the switching station at sheffield .