Yealink SIP-T48G Administrator's Manual page 230

Administrator's Guide for SIP-T2_Series_T4_Series IP Phones
account.X.timeout_fwd.timeout
Description:
Configures ring times (N) to wait before forwarding incoming calls for account X
when the call forward mode is configured as Custom.
Incoming calls will be forwarded when not answered after N*6 seconds.
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-T23P/G).
X ranges from 1 to 2 (for SIP-T21(P) E2).
Web User Interface:
Features->Forward& DND->Forward->No Answer Forward->After Ring Time
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 when the call forward mode is configured as Custom.
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-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-T23P/G).
X ranges from 1 to 2 (for SIP-T21(P) E2).
Example:
account.1.timeout_fwd.on_code = *76
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
216
Parameters Permitted Values
Integer from 0 to 20
String within 32 characters
String within 32 characters
Default
2
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Blank