Yealink SIP-T54S Administrator's Manual page 442

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/T5 Series/CP860/CP920 IP Phones
features.dnd.emergency_authorized_number
Description:
Configures the authorized numbers the IP phone can receive incoming calls from even if
DND feature is activated.
Multiple numbers are separated by commas.
Example:
features.dnd.emergency_authorized_number = 123,124
Note: It works only if the values of the parameters "features.dnd.allow" (except CP860 IP
phones) and "features.dnd.emergency_enable" are set to 1 (Enabled).
Web User Interface:
Features->Forward&DND->DND->DND Authorized Numbers
Phone User Interface:
None
features.dnd_refuse_code
Description:
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 LCD screen.
404-Not Found
480-Temporarily Unavailable
486-Busy Here
603-Decline
If it is set to 486 (Busy Here), the caller's phone LCD screen will display the reason "Busy
Here" when the callee enables DND.
Note: For Yealink IP phones (except CP860), it works only if the value of the parameter
"features.dnd.allow" is set to 1 (Enabled).
Web User Interface:
Features->General Information->Return Code When DND
Phone User Interface:
None
features.dnd.large_icon.enable
Description:
Enables or disables the IP phone to display a large DND icon on the idle screen.
0-Disabled
1-Enabled
416
String within 511
characters
404, 480, 486 or 603
0 or 1
Blank
480
0