What NAC are they using?
I would not expect other channels to follow as there are not many p25 capable radios in the field.
If i remember correctly they has p25 on citywide 4 in the past.
I am pretty sure if was Back early 2000's they had zone 1 going over cw4 in digital.
No it's been P25 for a few years. It is not heavily used i.e. As stated it's not in patrol radios it's usually in executives radios many of which are not carrying a P25 radio.
Ok. Is it a multicast from another division? Are you listening to it on something that can be decoded?