Yealink SIP-T54S Administrator's Manual page 441

Configuring Basic Features
Features->Forward&DND->On Code
Phone User Interface:
Menu->Features->DND->AccountX->On Code
String within 32
account.X.dnd.off_code Blank
characters
Description:
Configures the DND off code to deactivate the server-side DND feature for account X.
The IP phone will send the DND off code to the server when you deactivate DND feature for
account X on the IP phone.
X ranges from 1 to 16 (for SIP-T54S/T48G/T48S/T46G/T46S/T29G)
X ranges from 1 to 12 (for SIP-T52S/T42G/T42S)
X ranges from 1 to 6 (for SIP-T41P/T41S/T27P/T27G)
X ranges from 1 to 3 (for SIP-T40P/T40G/T23P/T23G)
X ranges from 1 to 2 (for SIP-T21(P) E2)
Example:
account.1.dnd.off_code = *74
Note: It works only if the value of the parameter "features.dnd.allow" is set to 1 (Enabled)
and value of the parameter "features.dnd_mode" is set to 1 (Custom). It is not applicable to
SIP-T19(P) E2/CP860/CP920 IP phones.
Web User Interface:
Features->Forward&DND->Off Code
Phone User Interface:
Menu->Features->DND->AccountX->Off Code
features.dnd.emergency_enable 0 or 1 0
Description:
Enables or disables the IP phone to receive incoming calls from authorized numbers when
DND feature is enabled.
0-Disabled
1-Enabled
Note: The authorized numbers are configured by the parameter
"features.dnd.emergency_authorized_number". It works only if the value of the parameter
"features.dnd.allow" is set to 1 (Enabled).
Web User Interface:
Features->Forward&DND->DND->DND Emergency
Phone User Interface:
None
415