Panasonic KX-NS700 User Manual page 306

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