Yealink SIP-T2 SERIES Administrator's Manual page 401

Parameters
Phone User Interface:
Menu->Features->Call Forward->Always Forward->On Code
forward.always.off_code
Description:
Configures the always forward off code to deactivate the server-side always
forward feature. The IP phone will send the always forward off code to the server
when you deactivate always forward feature on the IP phone.
Example:
forward.always.off_code = *73
Note: For Yealink IP phones (except SIP-T19(P) E2 and CP860), it works only if the
value of the parameter ―features.fwd_mode‖ is set to 0 (Phone).
Web User Interface:
Features->Forward&DND->Forward->Always Forward->Off Code
Phone User Interface:
Menu->Features->Call Forward->Always Forward->Off Code
forward.busy.enable
Description:
Triggers the busy forward feature to on or off.
0-Off
1-On
If it is set to 1 (On), incoming calls are forwarded to the destination number when the
callee is busy.
Note: For Yealink IP phones (except SIP-T19(P) E2 and CP860), it works only if the
value of the parameter ―features.fwd_mode‖ is set to 0 (Phone).
Web User Interface:
Features->Forward&DND->Forward->Busy Forward->On/Off
Phone User Interface:
Menu->Features->Call Forward->Busy Forward->Busy Forward
forward.busy.target
Configuring Basic Features
Permitted Values Default
String within 32
Blank
characters
0 or 1
String within 32
Blank
characters
0
379