1.1 General Features68 Feature Manual[PC Programming]9.2.1 Main [2-1]—DND Override9.2.2 Feature settings [2-2]—FWD/DND9.3.1 Line Mode [3-1]—Mode of incoming CO calls—Day, Night, LunchFeature Manual References1.1.45 Do Not Disturb (DND) Override1.1.59 Fixed Buttons1.1.61 Flexible ButtonsOperating Manual References1.3.35 Do Not Disturb (DND)3.1.3 Flexible Button Assignment—FWD/DND button1.1.45 Do Not Disturb (DND) OverrideDescriptionExtension users can call users who have set the Do Not Disturb (DND) feature, if the extension is allowedto override DND through system programming ( [609] DND Override).Programming Manual References[PT Programming][609] DND Override[PC Programming]9.2.1 Main [2-1]—DND OverrideFeature Manual References1.1.44 Do Not Disturb (DND)Operating Manual References1.3.36 Do Not Disturb (DND) Override1.1.46 Door OpenDescriptionUsing an extension telephone, an extension user can unlock a door for a visitor.The door can be unlocked by extension users who are allowed through system programming to unlock thedoor for each time service mode ( [703-705] Door Opener—Day/Night/Lunch). While on a doorphone call,any extension user can unlock a door to let a visitor in ( 1.1.48 Doorphone Call).