Today, GRE released beta firmware for the PSR-800 to decode Project 25 Phase II trunked systems. Phase II isn't used in the immediate Washington area, although Loudoun County and Prince George's County use Project 25 Motorola X2-TDMA, which is Motorola's proprietary TDMA solution. See the RadioReference Wiki for information about the different "flavors" of Project 25.
The 700 MHz First Responders Interoperable Radio System Team (FIRST), which will eventually become Maryland's statewide trunked system, does use P25 Phase II. So far, this system is only active in the Baltimore and Eastern Shoe areas.
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