Yealink SIP-T3 Administrator's Manual page 438

Administrator's Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
Parameter features.dnd.emergency_enable
It enables or disables the phone to receive incoming calls from authorized numbers when the DND
feature is enabled.
Description
Note: The authorized numbers are configured by the parameter "features.dnd.emergency_author-
ized_number". It works only if "features.dnd.allow" is set to 1 (Enabled).
Permitted 0-Disabled
1-Enabled
Values
Default 0
Web UI Features > Forward&DND > DND > DND Emergency
Parameter features.dnd.emergency_authorized_number
It configures the authorized numbers the phone can receive incoming calls from even if DND feature
is activated.
Multiple numbers are separated by commas.
Example:
Description
features.dnd.emergency_authorized_number = 123,124
Note: It works only if "features.dnd.allow" and "features.dnd.emergency_enable" are set to 1
(Enabled).
Permitted
String within 511 characters
Values
Default Blank
Web UI
Features > Forward&DND > DND > DND Authorized Numbers
Parameter features.dnd_refuse_code
It configures a return code and reason of SIP response messages when rejecting an incoming call by
DND. A specific reason is displayed on the caller's phone screen.
Description
Note: It works only if "features.dnd.allow" is set to 1 (Enabled).
404-Not Found
480-Temporarily Unavailable
Permitted
486-Busy Here, the caller's phone screen will display the reason "Busy Here" when the callee
Values enables DND feature.
600-Busy Everywhere
603-Decline
Default 480
Web UI Features > General Information > Return Code When DND
Parameter features.dnd.large_icon.enable
It enables or disables the phone to display a large DND icon on the idle screen.
Description
Note: It works only if "features.dnd.allow" is set to 1 (Enabled).
Permitted 0-Disabled
1-Enabled
Values
Default 0
432
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