For visual call alerting and information without audible ringing, use Do Not Disturb (DnD). Calls receive normal call-forward-busy and no-answer treatment. To activate the Do-Not-Disturb feature:
Press the DnD soft key. A text message displays to indicate that the phone is in Do-Not-Disturb mode.
To deactivate the Do-Not-Disturb feature, Press the DnD soft key