AT&T CL4939 - Manual (Page 30)

24
Telephone operation
Options while on calls
Audio assist™
Some voices will sound louder and clearer if you
press
AUDIO ASSIST while you are on a call using
the handset. Press AUDIO ASSIST again to turn
the feature off. This feature automatically turns off
when you hang up. You must press
AUDIO ASSIST
every time you want to activate the feature.
Mute
Use this feature during a telephone conversation to
silence the handset or speakerphone microphone.
To mute the call:
During a telephone conversation, press MUTE to
silence the microphone. The MUTE light turns
on. You hear the other party, but the other
party does not hear you.
To take the call off mute:
Press MUTE and resume speaking. The MUTE
light turns off.
-OR-
Mute is automatically canceled when you end
the call.
NOTE: Switching between the handset and
speakerphone cancels the mute function.
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Audio assist TM is a trademark of Advanced American Telephones.