if this ends up being the case, denville surprised me with this decision. nothing like putting yourself on a public safety communications island.
i just do not understand the concept of agencies using non-public safety protocols for communications. and no, i am not getting into a sour grapes discussion about "wah wah wah i can't listen to them anymore." they're not all that exciting to begin with...
with the sheer amount of federal grant money out there in our area, potentially isolating your agency from some of that cash because you're using a non-P25 digital system is stupid. you've screwed yourself from inter-agency communications without getting permission from the county comm center, and using the county TRS. people-based communications (think dispatchers) break down more often and quickly than the general public would imagine, and forcing yourself to play the telephone game when you might not have had to can also become a safety issue.
if, in the unlikely event, they did this to prevent snooping and eavesdropping (because scanner listeners are evil), you should have ponied up and gone p25 encrypted. it probably costs more than your nxdn system, but then again, most things that are proven to work well in this type of environment are more expensive.
that said, i'm looking forward to finally have an agency with NXDN to monitor with DSD (provided they don't encrypt).
might as well keep that talkgroup on the county TRS up and ready to go at a moment's notice. they needed it all the time in the past for radio failures, and if NXDN is anything like the failed OpenSky "public safety" protocol, they'll probably need it again.