A2billing Web call back

HI everybody,

I have setup an A2billing billing system, and using the web callback function and it is really function well. But I am facing a problem that the webcallback cannnt send out the cardnumber as callerID to my trunk and it is always follow the setting under callerID inside the a2billing.conf.

Is it anyway to make the webcallback callerid follow back the cardnumber ?