I lived in TN for a couple of years, and made a lot of contacts there, as well as keeping in touch with the fine folks that still live there. Those contacts keep me informed as to a lot of the changes and things. As well as all the great listeners that keep data submitted to us so we can keep the db as accurate as we can. Just because a person doesn't live there currently does not mean they don't keep an "ear on things". They may have relatives, friends, business associates etc in TN. Not to mention that insider information from the ones that maintain, build, design, and work with those systems do submit a lot of good data. A lot of that has to remain anonymous due to legal reasons etc, but you can be assured, most of the data given is accurate. Not to mention that a lot of us have been doing the "scanner thang" for an very long time and do know what we are talking about in reference to how they work, and what's really going on with issues, and we have at least 2 or 3 folks on here that work for Uniden, Whistler, and I believe works with AOR . And then lastly, there are an lot of us on the site that work for Harris, EFJ, iCom, Kenwood, and yes Motorola, and in radio related jobs including dispatching etc for Public Safety and do know a tad about how this works. Not being rude or the like, just stating facts.