Cisco C880 M4 Operating Manual page 4

automatic airplane flight control, air traffic control, traffic control in mass
transport systems, medical devices for life support, and missile guidance control
in weapons systems (hereafter, "high safety use"). Customers should not use
this product for high safety use unless measures are in place for ensuring the
level of safety demanded of such use. Please consult the sales staff if intending
to use this product for high safety use.
Measures against momentary voltage drop
This product may be affected by a momentary voltage drop in the power supply
caused by lightning. To prevent a momentary voltage drop, use of an AC
uninterruptible power supply is recommended.