DRA-36 & DRA-36M Mini-DIN-6 Pinout: 1 = TX Audio - source selected by JU3 (Left or Right) 2 = Ground 3 = PTT 4 = 9600 Baud RX Audio - Selected by JU5 in the "B" position 5 = 1200 Baud RX Audio - Selected by JU5 in the "A" position 6 = COS - Not normally used - (AllStar hardware COS input when JU1 is installed)