Panasonic KX-TDA15 User Manual page 38

1.2 Making Calls
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
While hearing the DND tone
1
R.B.Tone
Enter 1.
38 User Manual
extension no.
B.Tone
Dial extension
number.
Talk.
5
Enter 5.