Admins surf or log into the PDU after the power returns and issue commands from a Web page or text menu. They turn on outputs to restart devices or toggle hung servers. Good remote power switches also let you enter a different delay time for each outlet. Admins assign these time intervals when they first configure the switch. The power puzzle, though, gets more complicated with UPSs and their power management software.
Most vendors nowadays give away basic software with a purchase.
They all have enough dials, meters, reports, and flashing icons to keep your techs well informed. With basic power management software, the most important software configuration decision you make is how to handle an on-battery condition or event, triggered when the UPS detects a power loss. When the UPS transfers to battery, the extender module relays a shutdown single to each server over its corresponding serial cable. Well, suppose you do own a server farm and require lots of UPSs to guard hundreds of devices. The serially oriented software that UPS vendors give away can still be used, but administrative inconveniences begin to emerge.