You can enable Do Not Disturb when you do not want to receive calls.
To enable or disable Do Not Disturb:
On the Main Menu screen, select DND
Once you have activated DND your phone will display a red logo by your extension and will display “Do not disturb”
You can also activate and check if you are in DND in the home menu
To check:
Navigate to the home menu
Navigate to DND and select it to enable/disable. Note if the DND button is colored it means it is activated if not means it is disabled.