D-M to conduct test of base alert system Published Dec. 3, 2012 By 355th Fighter Wing Public Affairs 355th Fighter Wing Public Affairs DAVIS-MONTHAN AIR FORCE BASE, Ariz. -- The 355th Fighter Wing is scheduled to conduct a test of the Giant Voice system Dec. 5 at approximately 10:30 a.m. During this test, individuals on base will hear the following: 5-10 second wavering tone 5-10 second steady tone 5-10 second bugle call Before it starts, a verbal message will be given over the Giant Voice system stating that the test is about to begin.