KX-UT113/KX-UT123/KX-UT133/KX-UT136/KX-UT248
While on-hook
Press the fixed
FWD/DND button.
FWD/DND Off
: FWD/DND off
OR
Do Not Disturb : DND on
Press UP or DOWN with
the Navigator Key
to select the desired item.
Press ENTER to set.
A confirmation tone will
be heard.