Machines have an internal computer running the Windows XP operating system. Various methods of network communication are available, including LAN and ISDN: each machine has a two-way link to central systems administered by the Association of Train Operating Companies (ATOC). Machines can be controlled remotely, revenue data can be extracted overnight (polling) and fare, timetable and station name data can be downloaded to all machines or individual ones on demand. The back office functions are controlled by proprietary software modules designed by Scheidt & Bachmann.