Hi kc8flq, and welcome. Where are you at? Many agencies have gone digital or will be soon. You will not hear much in the near future on analog. USSS, IRS, ATF, TSA, USMS, USCG, DSS, USPS, and maybe more I am forgetting are all digital nationwide now. No analog to speak of. Others like FBI (half and half in most areas), USC (CBP), INS, BP, ICE, DEA, NPS, USFS, VA, FPS etc are in the transision in parts of the country. Some areas have gone full P25 digital on one or more of these agencies. Many state systems are digital, and even some local agencies now. My local college security even went P25 digital!This is the time to upgrade or get left out.
The NAC people talk about is the Network Access Code. It is a PL (CTCSS) or DPL (DCS) for the digital P25 world. We are all searching these out and taking notes on who uses what, and where. It helps to identify who you are picking up. Many digital coms are encrypted
and you can't tell who it is unless you read a well know NAC code. NAC codes can be read even when encrypted (unlike analog DES encryption), so you can get a good idea of who you are hearing on a frequency even though you can't hear what they are saying. It is a new world, and I think more fun for searchers as things change.
Phil
