Yealink SIP-T2 SERIES Administrator's Manual page 394

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Phone User Interface:
Menu->Features->Call Forward->No Answer Forward->After Ring Time
account.X.timeout_fwd.on_code
Description:
Configures the no answer forward on code to activate the server-side no answer forward
feature for account X. The IP phone will send the no answer forward on code and the
pre-configured destination number to the server when you activate no answer forward
feature for account X on the IP phone.
X ranges from 1 to 16 (for SIP VP-T49G/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.timeout_fwd.on_code = *76
Note: It works only if the value of the parameter "features.fwd_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->Forward->No Answer Forward->On Code
Phone User Interface:
Menu->Features->Call Forward->No Answer Forward->On Code
account.X.timeout_fwd.off_code
Description:
Configures the no answer forward off code to deactivate the server-side no answer forward
feature for account X. The IP phone will send the no answer forward off code to the server
when you deactivate no answer forward feature for account X on the IP phone.
X ranges from 1 to 16 (for SIP VP-T49G/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.timeout_fwd.off_code = *77
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Parameters Permitted Values Default
String within 32
Blank
characters
String within 32
Blank
characters