Panasonic KX-TDA15 - Page 74

1.3 Call Forwarding (FWD)/Do Not Disturb (DND) Features
74 Feature Guide
Feature Guide References
2.2.1 Class of Service (COS)
User Manual References
1.2.4 When the Dialled Line is Busy or There is No Answer
1.7.2 Refusing Incoming Calls (Do Not Disturb [DND])