822 Matrix ETERNITY NE System Manual
Do Not Disturb (DND)
Extension users may restrict incoming calls landing on their extensions, in order to work without disturbance. The
feature, Do Not Disturb, enables users accomplish this. This feature is useful to extension users who are in the
middle of a meeting or any important work that requires their undivided attention.
Using DND, users can restrict—all calls, internal calls or external calls. However even if DND is set, users can route
their incoming calls to an Intercept Destination. Intercept Destination can be configured only by the System
Engineer. This destination can be the extension users own mailbox or another extension. In this way, extension
users can ensure that they do not miss any important calls.
If required, when DND is set, a Stuttered Dial Tone can be played to the user for notification.
DND can be set and canceled by
• Extension users
• Operator for extension users, referred to as DND-Remote.
Doing so, calls — all, internal or external— will be barred. However, the extension user would continue to receive:
• Alarm calls.
• Reminder calls.
• Auto Call Back calls (Auto Callback as well as Auto Redial)
• Emergency Reporting Calls.
Also, the extension user can:
• use all the features of the PBX.
• make Outgoing calls and
• make Internal calls to other extensions.
DND has two supplementary features— DND-Override and Privacy from DND-Override.
The 'Do Not Disturb' feature restricts calls to the phone on which DND is set. The 'DND-Override' feature breaks
this restriction allowing the calls to land on the phone on which DND is set. Protection is also given to the phone on
which DND-Override is attempted. If the phone on which DND-Override is attempted has 'Privacy from DND-
Override' enabled, the calling phone shall not be able to Override the DND.
When a caller calls a phone on which DND is set, he/she gets Routing tone (Feature tone). The caller can dial
DND-Override code. On dialing DND-Override code the call is placed on the called phone and the called phone
starts ringing.
The DND-override feature works only if the calling phone has 'DND-Override' feature enabled in its CoS group.
DND-Override will not work if the called phone has ‘Privacy from DND-Override’ enabled in its Class of Service or if
the called extension has opted for intercept routing.
So, using DND-Override feature, the users can be reached in case of some Emergency despite the DND set on the
phone.
• DND when set/canceled from the SA mode, will not depend on the assigned CoS.
• The system supports only single-point DND with Intercept Destination, which means, if the destination
extension has also set DND with Intercept Destination, the call will not follow the forwarding path.
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