Look at the control board that is on the housing (the one left behind when you pull the MEI head out of the cage). If the board that remains has a piggy backed daughter card installed, your validator is flashed with the easytrax option, it will not work without additional com equipment. Unfortunately, the only way to get rid of easytrax is to reflash the head with the option turned off. You will also need to remove the daughtercard form the control board I believe, I've always removed the daughter board after having the head re-flashed. So I can't verify 100% for sure if it is required, but I was told to remove it. I've also only use 6607R's withe BB1. I don't really know what a 6627r is.