The State of South Dakota is scrambling to find funds to update the digital state radio system to P25. Our fire department will probably have to update our current radios with a software update or replace them all together for them to work on the updated system when and if it happens. The state radio system currently is a trunked VHF multisite digital voice system installed by Motorola. Could somebody please explain to me what "P25" means in terms that I can understand. All the research that I have attempted to do on it just confuses me more.