UMB (UPS Monitoring Board) is a board which can be installed
on a slot of an IBM-PC (or compatible) as a server of a
Netware LAN system.
If the UMB is connected to ELSA intelligent UPS (which has UMB
interface) and the Netware UPS Monitoring Software Module
is activated, the ELSA UPS can communicate to the server if power
line is off or the battery energy is low.
It broadcast warning to all workstation and then closes the files
automatically before the UPS shutdown due to battery low
condition. It's prevent the possibility permanent damage of the
files inside the server.