AT&T MF279 - Powering On;Off; TTY Support

Powering On/O
The On/O switch is used to turn your AT&T Wireless Internet device on or o. When
powered o, the AT&T Wireless Internet device will no longer send or receive calls,
but it will continue to charge the backup battery if still connected to the wall outlet.
To turn on your AT&T Wireless Internet device, slide the On/O switch to the ON
position. The Power light will turn solid green if connected to a power supply; it will
blink green if on backup battery power. To turn o your AT&T Wireless Internet device,
slide the On/O switch to the OFF position.
TTY Support
TTY (Text Telephony) and TDD (Telecommunications Device for the Deaf) are
supported by the AT&T Wireless Internet device. 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.
To set the TTY mode or turn TTY support o, dial *983*889*n# on your connected
phone, replacing n with one of the following numbers:
• Replace n with 0 for TTY O mode. Users who can hear and talk can turn o
TTY support. This is the default setting.
• Replace n with 1 for TTY Full mode. Users who cannot talk or hear can use this
mode to send and receive text messages through a TTY device.
• Replace n with 2 for VCO mode. Users who can talk but cannot hear can use this
mode to talk through the phone and receive responses via text messages.
• Replace n with 3 for HCO mode. Users who can hear but cannot talk can use this
mode to listen to calls and respond via text messages..
NOTE: If TTY support is enabled, it will be turned o automatically aer seven (7) days
of inactivity, or when the device is powered o.
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