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Administrator’s Guide for SIP-T2 Series/T4 Series/T5 Series IP Phones
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Do Not Disturb (DND)
DND feature enables the phone to reject all incoming calls automatically when you do not want to be
interrupted. You can choose to implement DND locally on the phone or on the server-side.
Usually, you can activate DND when the phone is idle. The phone stays in the DND state until you
deactivate DND manually.
You can also temporarily activate DND during calls, the new incoming calls are rejected automatically.
After ending the call, the DND is deactivated automatically. It prevents from interrupting during current
calls and avoids missing calls after calls end.
Topics
DND Settings Configuration
DND Feature Configuration
DND Synchronization for Server-side Configuration
DND Settings Configuration
You can change the following DND settings:

Enable or disable the DND feature. If disabled, DND soft key is not available, the users have no
permission to configure DND on their phone.

Choose a DND mode. You can configure DND for all lines or specific lines.

Enable or disable the phone to persist DND state across calls when activating DND during calls. If
disabled, the DND is automatically deactivated after calls end.

Enable or disable DND emergency feature and specify DND authorized numbers. These numbers
will not to be DND when the DND feature is enabled. The incoming call will not be logged in the
Missed Calls list.

Define the return code and the reason of the SIP response message for a rejected incoming call
when DND is activated. The caller’s phone LCD screen displays the received return code.

Allow or disallow the IP phone to display a large DND icon on the idle screen. It helps users to
clearly view that DND is activated.
The following table lists the parameters you can use to configure the DND settings.
Parameter features.dnd.allow <y0000000000xx>.cfg
Description It enables or disables the DND feature.
Permitted
Values
0-Disabled, DND cannot be activated and users are not allowed to configure DND on
the phone.
1-Enabled
Default 1