Retired Vol. FF, 911 Oper/Disp Berkshire County Comm Ctr, Comm Off. Mass Emer Mngmnt Agency. General Class Amateur N4UYV
Since I don't have one I can't be sure, but if the Icom uses a 1/8" earphone jack (anywhere from 2 conductor to 4 conductor) it should work. The generic cable is a 5 (+/- 1.5) volt to RS-232 level bidirectional cable running a single pair on the low voltage side.