Panasonic KX-NCP500 User Manual page 204

PT/SLT/PS/SIP Extn.
7
Off-hook.
Enter
same
#
extension PIN
Enter #.
Enter same extension PIN
(max. 10 digits).
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PIN: Personal Identification Number
9 9 1
Enter 1.
799.
#
Enter #.
extension PIN
Enter extension PIN
(max. 10 digits).
C.Tone
On-hook.