Yealink SIP-T3 Administrator's Manual page 527

Administrator's Guide for SIP-T2 /T3 /T4 /T5 /CP920 IP Phones
Permitted
URL within 511 characters
Values
Default
Blank
Parameter action_url.unheld
It configures the action URL the phone sends when a held call is resumed.
Description Example:
action_url.unheld = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Parameter action_url.mute
It configures the action URL the phone sends when muting a call.
Description Example:
action_url.mute = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI Features > Action URL > Mute
Parameter action_url.unmute
It configures the action URL the phone sends when un-muting a call.
Description Example:
action_url.unmute = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI Features > Action URL > UnMute
Parameter action_url.missed_call
It configures the action URL the phone sends when missing a call.
Description Example:
action_url.missed_call = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI
Features > Action URL > Missed Call
Parameter action_url.busy_to_idle
It configures the action URL the phone sends when changing the state of the IP phone from busy to
idle.
Description
Example:
action_url.busy_to_idle = http://192.168.0.20/help.xml?IP=$ip
521
<y0000000000xx>.cfg
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<y0000000000xx>.cfg
<y0000000000xx>.cfg