Regarding your screenshot showing the P25 channel ID table, I believe that bandplan is system-wide for Palmetto 800. That's the bandplan that is advertised to subscriber radios throughout the system. Because Palmetto 800 is Phase 2 capable, it shows channel entries for both FDMA (Phase 1) and TDMA (Phase 2). At the time they begin transitioning talkgroups to Phase 2, the subscriber radios will use the TDMA channel entries instead of FDMA. Assuming the transition is gradual (talkgroup by talkgroup) as opposed to all at once, both entries will need to be advertised until the transition is completed. So this listing is essentially "future-proofing" for when the system transitions to Phase 2.
Until the transition begins, all talkgroups in the database will remain marked with a "D" indicating FDMA/Phase 1. When this transition begins, as people confirm certain talkgroups are changed to Phase 2, we will make those changes. The database changes won't happen instantly or automatically. As with everything in the database, we are dependent on users making the observations and submissions. There will be some degree of lag time between when changes are made and when the database is updated.
It's also possible for talkgroups to operate in mixed mode (Phase 1 and Phase 2). Again, depending on how the transition is implemented, it could be all at one time or a gradual change. Once a talkgroup is verified to use Phase 2 at all, even in mixed mode, we'll change the database entry to "T".
It's been confirmed that some talkgroups used by the Palmetto 800 technical staff are already using some Phase 2 talkgroups. This is likely to being testing/verifying that the Phase 2 function works as expected. To my knowledge, no other state, county or local agency has been confirmed to use Phase 2 yet.