Important Information; E911 Service; Power Outages; Backup Battery - AT&T MF279 User Manual

Important Information

E911 Service

For emergency calls, you may have to provide your location address to the 911 operator.

Power Outages

The AT&T Wireless Internet device has a backup battery, for use in the event of a
power outage, with talk time of approximately 150 minutes and standby time of
approximately 27 hours (depending on environmental factors). In the event of a
power outage (commercial power no longer available), the AT&T Wireless Internet
device will automatically begin using the backup battery, provided there is sufficient
battery charge left. If there is no battery charge at the time of the power outage, the
device will not be operable.
To make calls using your backup battery, you must plug a corded phone or landline
phone into one of the "Phone" ports on the AT&T Wireless Internet device.
The AT&T Wireless Internet device will disable Wi-Fi to conserve power while using
the backup battery when there are no devices connected. To re-enable Wi-Fi while
using the backup battery, press the WPS button. Or, if power is available, plug the
AT&T Wireless Internet device into an electrical wall outlet to restore Wi-Fi. Please
allow at least one minute for the Wi-Fi function to restore.
If you experience a power outage and your backup battery is fully depleted, it will be
necessary to restart your device when power is restored by sliding the On/Off switch
to the ON position; the Power light will turn solid green.

Backup Battery

A new backup battery should last for approximately five (5) years, but the life of any
backup battery can be adversely affected by environmental conditions like moisture
and heat. To get the longest service from your backup battery, do not place the AT&T
Wireless Internet device in direct sunlight or in wet or extremely cold environments.
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