Buffalo TS-XL User Manual page 60

UPS
For best results, the TeraStation should be
connected to an Uninterruptible Power Supply.
APC SmartUPS models work well. A UPS may
be used with either a Serial or USB connection
to the TeraStation. After attaching the UPS
to the TeraStation, navigate to System/Power
Management/UPS Settings in the Web Admin
Tool. Configure your desired settings and click
Save.
Note: Even if you've previously configured your
UPS settings, after attaching a UPS to the TeraStation, open this page and click Save. Until you
do, the UPS may not be recognized properly.
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