2.3.3 Do Not Disturb (DND)
Description
An extension user can make use of the DND feature. If this feature is set, calls will not arrive at the extension,
but will arrive at another extension using the Idle Extension Hunting feature (® 2.2.1 Idle Extension Hunting)
or the Intercept Routing—Busy/DND feature (® 2.1.1.6 Intercept Routing). When a destination cannot be
found, the calling extension will hear the DND tone, while the calling outside party will hear a busy tone.
Conditions
• DND for Trunk Calls/Intercom Calls
The DND feature can be set for trunk calls, for intercom calls, or for both of them by the extension user.
• DSS button in DND Mode
The DSS button light will turn red if the assigned extension has set DND.
• DND Override
An extension in DND mode can be called by other extension users who are allowed to override DND in
their COS.
• Paging DND
It is programmable whether the PBX pages extensions in DND mode through system programming. (®
2.17.1 Paging)
• Intercept Routing—Busy/DND
If a call arrives at an extension in DND mode, the call can be redirected to a preprogrammed destination
by the Intercept Routing—Busy/DND feature.
• Idle Extension Hunting
While searching for an idle extension within an idle extension hunting group, any extension that has DND
set will be skipped. The call will go to the next extension in the group, not the Intercept Routing—Busy/
DND destination.
• If (1) a trunk call via the ELCOT/LCOT or T1 (LCOT) card arrives at an extension in DND mode and (2)
the Intercept Routing—Busy/DND destination is not available and (3) there is no available extension in the
idle extension hunting group, then the original extension in DND mode will ring.
• Calls from a doorphone arrive at the extension even when the extension is in DND mode.
PC Programming Manual References
10.3 PBX Configuration—[2-3] System—Timers & Counters—Dial / IRNA / Recall / Tone—
Tone
Length—Busy Tone / DND Tone
10.6.3 PBX Configuration—[2-6-3] System—Numbering Plan—B/NA DND Call Feature
→ BSS / OHCA / Whisper OHCA / DND Override
→ BSS / OHCA / Whisper OHCA / DND Override-2
10.7.1 PBX Configuration—[2-7-1] System—Class of Service—COS Settings—Assistant— DND Override
12.1.1 PBX Configuration—[4-1-1] Extension—Wired Extension—Extension Settings—FWD / DND
12.1.2 PBX Configuration—[4-1-2] Extension—Wired Extension—FWD/DND
12.2.1 PBX Configuration—[4-2-1] Extension—Portable Station—Extension Settings—FWD / DND
12.2.2 PBX Configuration—[4-2-2] Extension—Portable Station—FWD/DND
Feature Guide References
5.1.1 Class of Service (COS)
76 Feature Guide
2.3.3 Do Not Disturb (DND)
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