Dallas Fire Channel 1 453.875 FD primary Channel. Engine, Truck, Chief Dallas Fire Channel 2 453.900 MICU primary Channel. DFR 11 and DFR 12 which are talk around direct channels. I am using a Motorola Visar radio with MCD1200 enabled to help eliminate the data burst that is typically heard on a scanner. It will eliminate most but not all of the Data burst associated with the units keying up using the MCD1200 signaling.