Yealink SIP-T48G Administrator's Manual page 235

Parameters
forward.no_answer.target
Description:
Configures the destination number the IP phone forwards incoming calls to after a
period of ring time.
Example:
forward.no_answer.target = 3603
Web User Interface:
Features->Forward &DND->Forward->No Answer Forward->Target
Phone User Interface:
Menu->Features->Call Forward->No Answer Forward->Forward to
forward.no_answer.timeout
Description:
Configures ring times (N) to wait before forwarding incoming calls.
Incoming calls will be forwarded when not answered after N*6 seconds.
Web User Interface:
Features->Forward &DND->Forward->No Answer Forward->After Ring Time
(0~120s)
Phone User Interface:
Menu->Features->Call Forward->No Answer Forward->After Ring Time
forward.no_answer.on_code
Description:
Configures the no answer forward on code to activate the server-side no answer
forward feature. 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 on the IP phone.
Example:
forward.no_answer.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
Configuring Basic Features
Permitted Values
String within 32 characters
Integer from 0 to 20
String within 32 characters
Default
Blank
2
Blank
221