Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
If the default password ***** the phone is not changed, then you can
try entering 265 #6*999 then choosing options 4, 1 then 3
See if it will accept the default password ***** 1234#
If the default password ***** not work, then try to reset the password ***** the programming tool.
If you have the programming tool, you can reset any password ***** any mailbox, by selecting
from among the shortcuts at the left side of the screen.
then select the Mailbox in question, then select
The Programming Tool is available only from Panasonic. It is software that runs on a computer, and allows access to the phone's programmatic details in its memory.
I have Opted Out of this case, owing to having reached the limits of my knowledge on this case, I regret to have to say. Another Expert will hopefully pick up on this case and have the knowledge you need.