6.3 [4-1-2] Wired Extension—FWD/DND6.12 [4-2-2] Portable Station—FWD/DNDPT Programming Manual References[507] DND OverrideFeature Manual References3.1.21 COS (Class of Service)Operating Manual References1.3.19 DND (Do Not Disturb)4.1.11 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 to unlock the door in Class of Service (COS)programming. While engaged on a doorphone call, any extension user can unlock the door to let the visitor in.(® 4.1.12 Doorphone Call)Conditions• Hardware Requirement: A user-supplied door opener installed on each door.• A door opener can unlock a door even if no doorphone is installed.• Door Open DurationAn opened door will remain unlocked for a preprogrammed length of time.Installation Manual References3.9.1 Connection of Doorphones, Door Openers, External Sensors, and External RelaysPC Programming Manual References4.5 [2-3] Timers & Counters—DISA / Door / Reminder / U. Conf— Doorphone—Open Duration4.9 [2-6-1] Numbering Plan—Main—Features— Door Open4.12 [2-7-1] Class of Service—COS Settings—Optional Device & Other Extensions— Door UnlockPT Programming Manual References[207] Door Unlock Time[512] Permission for Door Open AccessFeature Manual References3.1.21 COS (Class of Service)86 Feature Manual Document Version 2009-124.1.11 Door Open
