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B-6
Hardware Installation Guide for Cisco Media Experience Engine 3000
OL-17000-01
Appendix B Maintaining the Cisco MXE 3000
Using Power Protection Devices
Uninterruptible Power Supplies
Uninterruptible power supply (UPS) systems offer the most complete protection against variations in
power because they use battery power to keep the system running when AC power is lost. The battery is
charged by the AC power while it is available, so once AC power is lost, the battery can provide power
to the system for a limited amount of time—from 15 minutes to an hour or so—depending on the UPS
system.
UPS systems range in price from a few hundred dollars to several thousand dollars, with the more
expensive units allowing you to run larger systems for a longer period of time when AC power is lost.
UPS systems that provide only 5
minutes of battery power let you conduct an orderly shutdown of the
system but are not intended to provide continued operation. Surge protectors should be used with all UPS
systems, and the UPS system should be Underwriters Laboratories (UL) safety-approved.