Yealink SIP-T3 Administrator's Manual page 530

Parameter action_url.call_waiting_off
It configures the action URL the phone sends when the call waiting feature is disabled.
Description Example:
action_url.call_waiting_off = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI Features > Action URL > Call Waiting Off
Parameter action_url.headset
It configures the action URL the phone sends when pressing the HEADSET key.
Description Example:
action_url.headset = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Supported
All phones except CP920/CP925/CP935W
Devices
Web UI Features > Action URL > Headset
Parameter action_url.handfree
It configures the action URL the phone sends when pressing the Speakerphone key.
Description Example:
action_url.handfree = http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default
Blank
Supported
All phones except CP920/CP925/CP935W
Devices
Web UI Features > Action URL > Handsfree
Parameter action_url.cancel_callout
It configures the action URL the phone sends when canceling the outgoing call in the ring-back state.
Description Example:
action_url.cancel_callout= http://192.168.0.20/help.xml?IP=$ip
Permitted
URL within 511 characters
Values
Default Blank
Web UI Features > Action URL > Cancel Call Out
Parameter action_url.remote_busy
It configures the action URL the phone sends when the outgoing call is rejected.
Description
Example:
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
<y0000000000xx>.cfg
Advanced Features
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