Yealink SIP-T48G Administrator's Manual page 572

Administrator's Guide for SIP-T2 Series/T19(P) E2/T4 Series/CP860 IP Phones
Description:
Configures the action URL the IP phone sends when pressing the HEADSET key.
Example:
action_url.headset = http://192.168.0.20/help.xml?IP=$ip
Note: It is not applicable to CP860 IP phones.
Web User Interface:
Features->Action URL->Headset
Phone User Interface:
None
action_url.handfree
Description:
Configures the action URL the IP phone sends when pressing the Speakerphone
key.
Example:
action_url.handfree = http://192.168.0.20/help.xml?IP=$ip
Note: It is not applicable to CP860 IP phones.
Web User Interface:
Features->Action URL->Handfree
Phone User Interface:
None
action_url.cancel_callout
Description:
Configures the action URL the IP phone sends when cancels the outgoing call in the
ring-back state.
Example:
action_url.cancel_callout = http://192.168.0.20/help.xml?IP=$ip
Web User Interface:
Features->Action URL->Cancel Call Out
Phone User Interface:
None
552
Parameters Permitted Values
URL within 511 characters
URL within 511 characters
Default
Blank
Blank