Call Return
You are able to use shortcodes to call the last number you dialed.
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.
Log into your account.
Select Switchboard.
Select number.
Select Outbound > Call Return.
Toggle the setting to ON.
To repeat the call to the last number, press *69.