Panasonic KX-NCP500 User Manual page 46

1.2.4 When the Dialled Line is Busy or There is No Answer
Monitoring Another Extension (Call Monitor)
The preprogrammed extension can monitor another extension.
To monitor
PT/SLT/PS
Off-hook.
To an Extension Refusing the Call (DND Override)
The preprogrammed extension can call someone who has set the DND feature.
PT/SLT/PS
Off-hook.
46 User Manual
(DSS)
OR
(PDN)
OR
(SDN)
OR
extension no.
Press red DSS, PDN, or SDN,
or dial extension number.
extension no.
DND Tone
Dial extension
number.
5
B.Tone C.Tone
Enter 5.
1
R.B.Tone
Enter 1.
Monitoring starts
Talk.