Hi, I am using a TDM400P to take calls from the PSTN and allow the caller to make calls from the US through the a2billing traditional prepaid phonecard application. I'm already able to charge the customers but I need to set up an extra charge if the customer is using my Toll Free number instead of my local number to get the connection. How is it usually done? I know it's probably a too basic question but I'm new to this. Any clue or help will be appreciated. Thank you in advance.