Polycom VVX Series Manual page 13

*78
Do Not Disturb Activation
Allows Users to activate the Do Not Disturb feature by dialling the
assigned FAC. When Do Not Disturb is active, a User's phone will not
ring and all incoming calls will receive 'busy' . If the User has Voice Mail,
by default the call will be forwarded to Voice Mail. If a User has set Call
Forwarding Busy, calls will be forwarded to the destination number
configured.
*79
Do Not Disturb Deactivation
Allows Users to deactivate Do Not Disturb.
*66
Last Number Redial
Allows Users to redial the last number dialled. Users can only redial calls
where the call type is allowed in the Outgoing Calling Plan
*74
Speed Dial 8
Allows Users to program an assigned one-digit (2 through 9) speed dial
code to commonly called numbers.
*75
Speed Dial 100
Allows Users to program an assigned two-digit (00 through 99) speed
dial code to commonly called numbers