Grandstream Action URL Guide - Manual (Page 6)

ActionURL Module User Guide Page 5 of 9
$program_version The software version of the phone
$hardware_version The hardware version of the phone
$language The display language of the phone
$local The called number on the phone
$display_local The display name of the called number on the phone
$remote The call number on the remote phone
$display_remote The display name of the call number on the remote phone
$call-id
The message label in the same session group. This is the only thing to
distinguish if the session messages are in the same group, and the requests
and the responses should contain the same call id.
$active_user The account number which is during a call on the phone
$active_host The SIP server of the account number which is during a call on the phone
$duration Talk time (Unit: seconds)
$calldirection Direction of the call, which represents the phone is calling party or called party