[Freeswitch-users] AOC for SIP

Hi, I'm wondering if anyone has implemented some kind of AOC (advice of charge) for SIP channels? This is either a frequent INFO message during the call or an extra to the BYE message. This includes pricing calculation based on call duration and destination (can be handled externally) and sending out the AOC message (either in the Snom-way or the Patton-dialect). Thanks! Frank http://wiki.snom.com/wiki/index.php/Advice_of_charge_%28AOC%29_in_SIP