Yealink SIP-T56A User Manual page 259

Select Enabled from the pull-down list of Recent Call In Dialing.
2.
Click Confirm to accept the change.
3.
Note Recent call in dialing is configurable via web user interface only.
To view placed calls list when the phone is on the dialing interface:
Pick up the handset, press the Speakerphone key or tap the line key.
1.
The touch screen displays the placed calls list.
Drag up and down to scroll through placed calls.
2.
Basic Phone Features
259