Panasonic KX-T336 System Reference Manual page 842

E. Changing Password
Description
Enables you to change passwords for "On Site"
and "Remote."
Operation
Enter four digit alphanumeric characters for each
password if you want to change the factory
setting default value.
Default values are as follows:
Items
<On Site>
Protection Level 1
Protection Level 2
Protection Level 3
Protection Level 4
Items
Default
<Remote>
Protection Level 1
LVL1
Protection Level 2
LVL2
Protection Level 3
LVL3
Protection Level 4
LVL4
7-E-1
Default
LVL1
LVL2
LVL3
LVL4