Good FD Radio Info
http://forums.radioreference.com/virginia-radio-discussion-forum/219364-fairfax-county-fd-use-atgs.html - Aug 2011 - lots of details on their radio system and usage
http://forums.radioreference.com/virginia-radio-discussion-forum/219364-fairfax-county-fd-use-atgs.html - Aug 2011 - lots of details on their radio system and usage