msr reader

Hi Guys I have 3 ibm surepos 500 systems running on windows 7 ultimate these can take a msr scanner which is built in But I can’t seem to get them to work they are connected by a rj45 connector any advice or help would be much appreciated

HI guys this is a long shot i have an ibm surepos 500 - 4840544 it has a built in MSR reader i cant seem to find the drivers for it it works on a com port which is number 3 i have change the baud rate to all of them and cannot get it work the os on it is windows xp pro due to running a pos...