Yealink SIP-T56A User Manual page 86

Smart Media Phone
User Guide for SIP-T56A
If set to other values except 0 (e.g., 5), the phone will be locked when the phone is inactive
in idle screen for the designated time (in seconds).
Tap to accept the change.
6.
When the phone is locked, the touch screen prompts "Phone locked." and displays the icon
on the status bar.
To unlock the phone, you must know the phone unlock PIN. The default phone unlock PIN
is "123".
To unlock the phone via phone user interface:
Tap the screen or tap the locked key, the touch screen prompts "Unlock PIN".
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