ISP has been slowly converting to P25 in areas where P25 is operational. For quite a while now, ISP has been using crossband repeater ties to patch the old UHF and new P25 700MHz. I don't know how many ISP units actually have 700 MHz capable radios at this time, but ISP will probably be on both UHF/P25 for interoperability purposes some time. Much of the state is still not on 700 MHz and probably never will be in the more rural and mountain areas.