DRA-39 RJ45 Pinout: Pinout shown as you are looking into the open end of the RJ45 female socket on the DRA-39. Orientation is - contact pins are up and the locking tab slot is down. The pinout follows standard EIA Ethernet. 12345678 ________ |''''''''| | | |__ __| |__|__|__| The following assumes the configuration socket has been wired "straight across" with short #24 jumper wires. 1 = RX Audio 2 = TX Audio - source channel selected by JU3 (Left or Right) 3 = PTT 4 = COS - Not normally used - (AllStar hardware COS input when JU1 is installed) 5 = CTCSS - Not normally used - (AllStar hardware CTCSS input when JU2 is installed) 6 = Ground 7 = Ground 8 = Ground