Yealink SIP-T19 - Manual (Page 75)

Basic Call Features
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To redial the last dialed number from your phone:
1. Press twice.
A call to your last dialed number is attempted.
To redial a previously dialed number from your phone:
1. Press when the phone is idle.
2. Press or to select the desired entry, and then press or the Send soft
key.
You can view the placed calls list when the phone is in the pre-dialing screen. To do this,
you should enable recent call in dialing in advance.
To enable recent call in dialing via web user interface:
1. Click on Directory->Setting.
2. Select Enabled from the pull-down list of Recent Call In Dialing.
3. Click Confirm to accept the change.
Note Recent call in dialing is configurable via web user interface only.