Last Number Redial
This is a very handy feature, particularly if you are using an entry-level handset that does not have this functionality enabled on the handsets themselves.
Last Number Redial allows you to dial the last number that called you by using the shortcode *66.
How to start using Last Number Redial:
Log into your account.
Go to Switchboard.
Select number.
Select Outbound > Last Number Redial.
Toggle to enable the setting to ON.
To redial the last number you called, dial *66.