Panasonic KX-NCP500 User Manual page 128

PT/SLT/PS/SIP Extn.
7
Off-hook. Enter 71.
FWD
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0
Both Calls
OR
1 Outside Calls
1
OR
Intercom Calls
2
Enter 0 to 2 as you desire.
DND Off
1
Set
OR
C.Tone
0
Cancel
Enter 1 to set On-hook.
or 0 to cancel.