Panasonic KX-NCP500 User Manual page 243

Problem
I want to distinguish the tones.
The MESSAGE button light lit.
An SDN button on my extension does not work.
Remedy
•
( To distinguish the ringing tones for each
CO, ICD Group, PDN, SDN, or INTERCOM
button (Digital proprietary telephone only),
3.1.3 Customising the Buttons)
•
Another extension left you a message
waiting indication while you were on the
phone or away from your desk.
•
A PDN button is not assigned on the
extension corresponding to your SDN
button.
Create a PDN button on the desired
extension. ( 3.1.3 Customising the
Buttons)
4.1.1 Troubleshooting
User Manual 243