Panasonic KX-NS1000 Pc Programming Manual page 16

1.1.1 For Your Safety
•
There is a risk that fraudulent telephone calls will be made if a third party discovers a personal identification
number (PIN) (verification code PIN or extension PIN) of the PBX.
The cost of such calls will be billed to the owner/renter of the PBX.
To protect the PBX from this kind of fraudulent use, we strongly recommend:
a.
Keeping PINs secret.
b.
Selecting complex, random PINs that cannot be easily guessed.
c.
Changing PINs frequently.
16 PC Programming Manual Document Version 2016-03