4.11 [2-6-3] Numbering Plan—B/NA DND Call FeatureFeature numbers used to access various PBX features can be programmed. The following features areavailable while hearing a busy, DND, or ringback tone. Each feature must have a unique feature number.For more information on flexible numbering, see "6.1.4 Flexible Numbering/Fixed Numbering" in the FeatureManual.BSS / OHCA / Whisper OHCA / DND OverrideSpecifies the feature number used to notify a busy extension of a second call by Call Waiting, or call anextension in DND mode.Default1Value Range1 digit (0–9, *, or #)Maintenance Console Location4.11 [2-6-3] Numbering Plan—B/NA DND Call FeatureProgramming Manual References6.1 [4-1-1] Wired Extension—Extension Settings—Option 2— Manual C. Waiting for Extension Call6.10 [4-2-1] Portable Station—Extension Settings—Option 2— Manual C. Waiting for Extension CallFeature Manual References3.1.11 CALL WAITING FEATURES3.1.12 Call Waiting Tone4.1.10 DND (Do Not Disturb)12.1.3 OHCA (Off-hook Call Announcement)20.1.4 Whisper OHCAExecutive Busy OverrideSpecifies the feature number used to interrupt an existing call to establish a three-party conference call.Default3Value Range1 digit (0–9, *, or #)Maintenance Console Location4.11 [2-6-3] Numbering Plan—B/NA DND Call FeatureProgramming Manual References4.12 [2-7-1] Class of Service—COS Settings—Extension Feature— Executive Busy Override386 PC Programming Manual Document Version 2009-124.11 [2-6-3] Numbering Plan—B/NA DND Call Feature