Open URL on event will allow you to either open a webpage or some application on a specific event. The setting is located in Settings -> Automation -> Event Rules.
The following OpenURL on event parameters are currently available:
{dnid} //Dialed number identifier
{name} //Caller ID name (if the server is sending any)
{phone}
{number}
{account}
{call_id} //The {call_id} variable will display the unique SIP call ID header value
Example usage:
www.example.com/{phone}
This will open the website www.example.com followed by the Caller ID number e.g. www.example.com/+1234567
www.example.com/{phone}/{name}
This will open the website www.example.com followed by the Caller ID number, followed by the Caller ID name e.g. www.example.com/+1234567/Smith