note 
Clarity Booster
If you encounter interference while using your phone, you can manually improve the sound by setting the Clarity Booster to on. This works only when the phone is in use.
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If another handset is in Privacy Mode, you cannot join the call. If someone is using the handset in Privacy Mode, Unavailable appears in the display when you try to join the call.
1)While on a call, press menu/clear.
2)Press 
/vol/∧ or 
/vol/∨ to move the pointer to Clarity Boost, and then select/
/audio tone.
Boost On and B appear in the display.
Use the same procedure to turn off Clarity Booster.
Privacy Mode
Privacy mode prevents interruption from other registered handsets. This works only when the phone is in use.
1)While on a call, press menu/clear.
2)Press 
/vol/∧ or 
/vol/∨ to move the pointer to Privacy Mode, and then select/
/audio tone.
ߥ appear in the display. To allow other registered handset to join a call, exit privacy mode. Use the same procedure above. Privacy Mode Off appears.
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