Panasonic KX-TDA100 Features Manual page 60

1.3 Call Forwarding (FWD)/Do Not Disturb (DND) Features
or intercom calls, but not both.
Note
The FWD and DND icons on a PS display reflect the settings for trunk calls only.
b)
pressing the FWD/DND—Both button (including FWD/DND button [fixed button]) or
the Group FWD—Both button will not change the FWD or DND mode for intercom
calls and trunk calls separately.
Feature Guide References
1.19.1 Fixed Buttons
1.19.2 Flexible Buttons
User Manual References
User Manual
3.1.2 Settings on the Programming Mode
60 Feature Guide