In order to program your radio for a P-25 system, it will have to be programmed with the proper system key by the administrator of the system. If you are for real, have a capable radio and will be authorized to operate on this system you should talk with your radio tech. If not, your XTS is just a fancy brick- having control channel information and talk group numbers aren't going to help you.
And you can BET no one will get off any information like NAC,Group,Ind Id, ect..
funny how something paid for with TAX MONEY isnt accessible to the ones who paid for it.
When I asked about NAC codes in Chicago it was like I was asking for Rahm Emmanuels personal home phone number,.It isnt a deep dark secret.
I do support LIMITING information about P25 systems.
One issue I DO have here is that ACCURATE info regarding NAC codes isnt being posted. Either thats by accident or design. I havent determined yet. Good Luck when you finally get your RECEIVER programmed.