7.In the "Restart Phone" field click 
to restart the IP phone.
Using Redial Key for “Last Number Redial”
The IP phone has an enhanced redial user interface that allows a user to quickly redial the last number that was dialed out from the phone. You can:
•Press the REDIAL button twice to redial the last number dialed.
•Press the REDIAL button once, scroll the list of numbers, then press the REDIAL button again to dial the number that displays on the screen.
The “last number redial” feature for the Redial key is static and is not configurable.
Additional Features
Model 57i IP Phone User Guide 103
