AT&T definity 7444 User Manual page 6

9) Call
appearances/feature
buttons
10) Select button
11) Mute button
12) Dial pad
13) Speaker/Reset
Speakerphone button
14) Message light
These 22 buttons can be used for either incoming and out
going calls (call appearances) and are labeled with an
extension number for accessing features (feature buttons) and
are labeled with a feature name. Each has a red in-use light
to tell you the line is being used or that this is the line you
will get when you lift your handset. The green status light
next to each call appearance and feature button tells you the
line or feature is being used.
Can be used in 3 different ways:
1)
 Drop-Test 
Used with
telephone;
 Conference-Ring 
2) Used with
ring from among 8 available patterns;
3)
 Speaker-Reset Spkr 
Used with
the environment and adjust the speakerphone to the
surrounding acoustic environment for optimal
performance.
For turning off the microphone of the built-in speakerphone
or the handset so the other person cannot hear you.
Note: If your telephone is set for the Speaker (listen-only)
feature, pressing  Mute  while on a call using the handset will
affect only the microphone associated with the handset.
When you use the Speaker feature, the Mute feature is also
activated and the light next to
The standard 12-button pad for dialing phone numbers and
accessing features. The letters "Q" and "Z" have been added
to the appropriate dial pad keys for directory access, and the
"5" button on your dial pad has raised bars for visually-
impaired users.
For accessing the speaker or the built-in speakerphone and
microphone combination. When you touch
 Speaker-Reset Spkr  you hear a set of tones as the speakerphone
performs an acoustic test of the environment. When the
tones stop, your speakerphone has finished adjusting itself
for optimal performance. It is now ready for use.
Note: Your telephone can be set for either the Speaker
(listen-only) feature the Speakerphone (listen and talk)
or
feature. Check with your System Manager to see how your
Speaker button is to be used.
A red light which goes on when a message has been left for
you.
to initiate a self-test of your
to select your own personalized
to perform an acoustic test of
 Mute  is always on.
 -Select  and then
2