Yealink SIP-T3 Administrator's Manual page 525

Administrator's Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
Parameter action_url.busy_fwd_on
It configures the action URL the phone sends when the busy forward feature is activated.
Description Example:
action_url.busy_fwd_on = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI Features > Action URL > Busy Forward On
Parameter action_url.busy_fwd_off
It configures the action URL the phone sends when the busy forward feature is deactivated.
Description Example:
action_url.busy_fwd_off = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI
Features > Action URL > Busy Forward Off
Parameter action_url.no_answer_fwd_on
It configures the action URL the phone sends when the no answer forward feature is activated.
Description Example:
action_url.no_answer_fwd_on = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default
Blank
Web UI Features > Action URL > No Answer Forward On
Parameter action_url.no_answer_fwd_off
It configures the action URL the phone sends when the no answer forward feature is deactivated.
Description Example:
action_url.no_answer_fwd_off = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI Features > Action URL > No Answer Forward Off
Parameter action_url.transfer_call
It configures the action URL the phone sends when performing a transfer.
Description Example:
action_url.transfer_call = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
519
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg