Yealink SIP-T2 SERIES Administrator's Manual page 404

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Description:
Configures ring times (N) to wait before forwarding incoming calls.
Incoming calls will be forwarded when not answered after N*6 seconds.
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->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
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->No Answer Forward->On Code
Phone User Interface:
Menu->Features->Call Forward->No Answer Forward->On Code
forward.no_answer.off_code
Description:
Configures the no answer forward off code to deactivate the server-side no answer
forward feature. The IP phone will send the no answer forward off code to the server
when you deactivate no answer forward feature on the IP phone.
Example:
forward.no_answer.off_code = *77
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).
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Parameters Permitted Values Default
String within 32
Blank
characters
String within 32
Blank
characters