Thought I would post a long overdue update.
Franklin County is not switching to NXDN, they have been slowly switching to a Midland P25 system. They had all of the county fire repeaters and most of the mobile and portable radios replaced before April 27th, but since then I haven't noticed many changes. They are still operating in analog mode and I have heard very few P25 transmissions.
They are having a lot of trouble with the new system, most of it seems to be programming related. The three new repeaters (all on the same freq) have a 5 second hangtime with no PL tone transmitted during the hangtime, so the users can't immediately tell when the repeater unkeys without looking at the display. This is a problem because there seems to be no standardization on what department uses which repeater, so often a department is trying to talk to 911 on one repeater while 911 is on another leading both repeaters to cover each other. Some of the radios also had to be shipped back to Birmingham because the channel names were wrong (eg. "WEST RPTR" was actually the east repeater).
The new repeaters are also narrowband, and were installed before most departments got the new radios. So for a while many departments had to use their older wideband radios and were virtually unreadable on the new system.
I got a chance to play with one of the new
Midland Syntech portables, and although it felt kinda cheap (it seemed like half the weight of my Icom F3161), it was still pretty cool and had a lot of features.
On a related note, in mid-April the FCSO replaced their old Motorola securenet capable repeater with a MotoTRBO one operated in analog only except for a few tests. Then sometime after April 27th replaced the TRBO repeater with a P25 repeater, also analog only except for some more extensive testing. Then about mid-May went back to the original Motorola repeater.