Yealink SIP-T48G Administrator's Manual page 296

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
X ranges from 1 to 2 (for SIP-T21(P) E2)
Note: It works only if the value of the parameter "features.dnd_mode" is set to 1
(Custom). It is not applicable to SIP-T19(P) E2 and CP860 IP phones.
Web User Interface:
Features->Forward&DND->DND->DND Status
Phone User Interface:
Menu->Features->DND->AccountX->DND Enable.
account.X.dnd.on_code
Description:
Configures the DND on code to activate the server-side DND feature for account X.
The IP phone will send the DND on code to the server when you activate DND
feature for account X on the IP phone.
X ranges from 1 to 16 (for SIP-T48G/T46G/T29G)
X ranges from 1 to 12 (for SIP-T42G)
X ranges from 1 to 6 (for SIP-T41P/T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G )
X ranges from 1 to 2 (for SIP-T21(P) E2)
Example:
account.1.dnd.on_code = *73
Note: It works only if the value of the parameter "features.dnd_mode" is set to 1
(Custom). It is not applicable to SIP-T19(P) E2 and CP860 IP phones.
Web User Interface:
Features->Forward&DND->DND On Code
Phone User Interface:
Menu->Features->DND->AccountX->On Code
account.X.dnd.off_code
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-T48G/T46G/T29G)
X ranges from 1 to 12 (for SIP-T42G)
X ranges from 1 to 6 (for SIP-T41P/T27P)
X ranges from 1 to 3 (for SIP-T40P/T23P/T23G )
X ranges from 1 to 2 (for SIP-T21(P) E2)
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