DND is a great tool to use when you need some peace and quiet, or when you'll be away from your phone for awhile and would rather not have it ring and ring.
When you set your phone to Do Not Disturb, or DND, callers will automatically be sent to voicemail. In addition, the caller will hear your busy message, if you configured one.
Polycom IP Series (550, 650)
Just press the physical Do Not Disturb button to turn on DND for all lines. Press the same button to turn DND off.
Polycom VVX Series (300, 400, 500)
Press the Home button and select DND. Repeat the process to turn DND off.
If you have any questions about this or any other feature on your phone, please don't hesitate to open a ticket with the Helpdesk.