Pin 1 White Audio In/Sound card line out Pin 2 Shield Pin 3 Black PTT Pin 4 Yellow Audio Out/Sound card line in Pin 5 Red Spare Looking at the jack in the back: 2 is at the bottom 1 is on the right 3 is on the left 4 is between 1 and 2 5 is between 2 and 3 k4ia Craig "Buck" Fredericksburg, Virginia USA