1 . FLASH button: use this button to engage the Call Waiting/Call Waiting Caller ID
function (feature provided by local phone company) .
2 . REDIAL button: use this button to redial the last number dialed (up to 32 digits) .
3 . PAUSE button: when in programming mode, press this button to insert a two sec-
ond pause .
4 . MUTE/SILENT button:
a . During a call: press MUTE/SILENT to silence your side of the conversation, for
added privacy; button will blink red to indicate that you are in MUTE mode; press
MUTE again to disable the function and return to your call .
b . During idle mode: press MUTE/SILENT to turn off the ringer; button will turn red
backlit when the ringer is off .
c . During incoming ring: press MUTE/SILENT to turn off the ringer for only that
call; phone will ring when the next call is received .
5 . (Speakerphone) button: press this button to engage the speakerphone function;
press again to turn the feature off . When the speakerphone is active, the button is
backlit red .
6 . Customer Service button: press the blue button for direct access to a Customer
Care Representative .
7 . 2-digit LED display: shows the loudness (for incoming voice and for the ringer);
when TONE button is pressed during a call, it briefly shows the current tone setting
of the phone; press TONE button while displaying the tone setting, and the display
shows the new tone setting as the phone toggles through its available tonalities .
8 . MEMORY buttons (M1 – M10): for saved numbers (see MEMORY STORAGE) .
9 . BOOST button: press BOOST to engage the extra amplification . In Boost On mode,
the phone has a volume range covering 50dB of amplification . When active, the
BOOST button is backlit red . Press BOOST again to turn off the extra amplification .
a . Press and hold the BOOST button (5 seconds) to engage the OSA (Outgoing
Speech Amplification) feature . Please read the OSA section before turning on
this feature.
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ALTO FEATURE LIST