Yealink SIP-T54S Administrator's Manual page 479

Parameters
account.1.busy_fwd.target = 3602
Note: It works only if the value of the parameter "features.fwd.allow" is set to 1 (Enabled)
and value of the parameter "features.fwd_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->Forward->Account X ->Busy Forward->Target
Phone User Interface:
Menu->Features->Call Forward->Account X ->Busy Forward->Forward to
account.X.busy_fwd.on_code
Description:
Configures the busy forward on code to activate the server-side busy forward feature for
account X.
The IP phone will send the busy forward on code and the pre-configured destination
number (configured by the parameter "account.X.busy_fwd.target") to the server when you
activate busy forward 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.busy_fwd.on_code = *74
Note: It works only if the value of the parameter "features.fwd.allow" is set to 1 (Enabled)
and value of the parameter "features.fwd_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->Forward->Account X ->Busy Forward->On Code
Phone User Interface:
Menu->Features->Call Forward->Account X ->Busy Forward->On Code
account.X.busy_fwd.off_code
Description:
Configures the busy forward off code to deactivate the server-side busy forward feature for
account X.
Configuring Basic Features
Permitted Values Default
String within 32
Blank
characters
String within 32
Blank
characters
453