AASTRA DT4x2 for BusinessPhone User Guide EN - Manual (Page 104)

Audible Adjustments
BusinessPhone – Cordless DT412/DT422/DT432 104
Audible Adjustments
In order to satisfy your personal needs, your Cordless is equipped
with many options to set and adjust a personal volume and ringing
signal. In addition to this there is a vibrator option.
Your Cordless is delivered with a set of standard audio settings for
best audio quality. In some environments, for example one with a
high noise level, these standard values might have to be adjusted
to get good audio quality. There are different SIM card settings for
normal conversation, and when loudspeaking function or headset
is used. Ask your system administrator if you require a different
setting.
Volume control
Use the volume keys to adjust the volume in the earpiece. See
section “ Description ” on page 9 for the location of volume controls.
To turn the microphone on or off during a call, see section “ Mute
microphone ” on page 43.
Loudspeaker volume
When you are making a call, the volume keys affect the
loudspeaker volume. This is useful when e.g. you enter a
machinery room.
Press the volume controls to adjust the loudspeaker volume
during a call.
The volume level is set and maintained until you adjust the volume
again.