good evening,E911,yes Northwest, Golder Ranch, and Three points, Picture rocks, Avra Valley Fires Depts. will remain on there Legacy system, but they do have PCWIN Radios for interops, Tucson Fire Dept. has a cross patch up with F-4&F-5,at the moment you can still hear TFD Dispatch on there House package UHF Freq 460.2000 !!!
From what I have read the fire dept is now on PCWIN which is a 700mhz P25 Phase 2 system requiring either a compatible Motorola radio or a Phase 2 Trunking scanner such as the GRE 800, Uniden 436 and Uniden 536.
If a scanner you must program the system into the scanner or select the system depending on which scanner you get and then select/put in the appropriate talkgroups to receive the departments you wish to hear.