Using “Do Not Disturb (DND)” Feature
PBX Do Not Disturb or DND functionality is the ability of a phone or client to ignore any incoming calls. The phone is taken off-hook or sends a signal to the PBX stating it is busy, and not available for calls. The call is then handled by the method programmed in the busy event, such as forwarding to another free extension or to voice mail.
This can be implemented by following the steps below:
1 – Lift the handset OR press the SPEAKER button 
2 – Dial
- *78 to turn on Do Not Disturb mode
- *79 to turn off Do Not Disturb mode
