What is the 4.9 GHz public safety band? In the US RF hackers may be familiar with the old VHF and UHF FM voice police/fire/ems radio bands. Few are aware that in the post-9/11 environment other public safety data and digital voice ops are moving to previously unused portions of the spectrum. In this video from the PhreakNIC 16 conference held November 9-11, 2012 in Murfreesboro, TN, Robert Portvliet and Brad Antoniewicz discussed the emerging public safety use of spectrum in the 700 MHz (TV whitespace), 800 MHz, 4.9 and 5 GHz bands. The presesntation includes information on websites you can access to assist in discovering the existence and location of these systems in your are.