Tom's Hardware learned that candidates would oversee machines running 166 MHz processors with 8 MB of RAM, which are used to display important technical train data to...
BMC is doubtful, other sources indicate that the hardware is from 1996, so it's not just old software. So I'll guess a KVMoIP device is bolted on (probably a relay on the power input, VGA, USB for keyboard and 'floppy' (Win3.11 was well before USB, but the hardware from 96 may have USB and the BIOS would likely make it viable for a DOS to use it).