Tty Support; Important Information; E911 Service; Power Outages - Zte AT&T MF279 User Manual

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AT&T Home Base, slide the ON/OFF button to the OFF position until all the lights turn off.

TTY Support

TTY (Text Telephony) and TDD (Telecommunications Device for the Deaf) are supported by the AT&T
Home Base. In order to use the TTY network, you must have a TTY-compatible phone and be in TTY
mode. Note that most digital wireless devices are TTY-compatible.
Dial *983*889*n# to set the TTY mode.
n = 0: TTY off mode. The standard voice speaking mode and listening mode. This is the default
setting.
n = 1: TTY full mode. Transmit and receive the TTY characters.
n = 2: VCO mode. Receive TTY characters but transmit by speaking into the speaker.
n = 3: HCO mode. Transmit TTY characters but receive by listening to the receiver.

Important Information

E911 Service

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

Power Outages

The AT&T Home Base has a back-up battery in the event of a power outage with talk time of
approximately 100 minutes and standby time of approximately 18 hours depending on environmental
factors. In the event of a power outage (commercial power no longer being available), the AT&T Home
Base will automatically begin using the back-up 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 back-up battery, you must plug a corded phone or landline phone into the
"Phone 1" or "Phone 2" port on the AT&T Home Base.
The AT&T Home Base will disable Wi-Fi to conserve power while using the back-up battery when there
are no devices connected. To re-enable Wi-Fi while using the back-up battery, slide the ON/OFF button
to the ON position. Or, if power is available, plug the AT&T Home Base into an electrical wall outlet.
If you experience a power outage and your back-up battery is fully depleted, it will be necessary to restart
your device when power is restored by sliding the ON/OFF button to the ON position until the power light
stays solid green.

Back-up Battery

A new back-up battery should last for approximately 5 years, but the life of any back-up battery can be
adversely affected by environmental conditions like moisture and heat. To get the longest service from
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