Hello Scannerman200,
About the only other frequency that CSX uses around the Cullman/Hanceville area, other than 161.370 MHz, which is the road channel, is 160.410 MHz, which is the dispatcher frequency. All calling signals, operations of the pusher at Lacon, etc, all happen on channel 84, or 161.370 MHz. Sometimes, the dispatcher will instruct trains to go to "channel 20", which is the dispatcher frequency listed above. I am not aware of any other channels used on these areas.
Hope that helps!