 A patrol unit may radio control that they are "code 6" on a traffic stop, to which control will give the "Roger" acknowledgement.Additional broadcasts will be requests for information on "cal IDs", or "CalOps" (the numbers that appear at the top of California Department of Motor Vehicle driver licenses) or on vehicle license plates.The result of which provides all of the expected details about the subject plus important details such as whether or not the licensee has any wants or warrants, FTAs (failure to appear in court) or FTPs (failure to pay a fine), etc.