Panasonic EB-GD75 Operating Instructions Manual page 71

Trouble Shooting
Verification On changing the phone lock code, verification of the
Failure new code is incorrect - retry changing the lock code
with correct verification
Incorrect Lock Disabling or enabling the lock code has failed due to
Code incorrect entry of the lock code - re-enter lock code
Incorrect PIN / The entered code is incorrect - re-enter code
PIN2 / PUK / correctly
PUK2
Auto Redial List Redial list of unsuccessfully dialled numbers is full -
Full switch the phone off and then on again
62