[Serusers] Question on Accounting

[Nhadie]

Hi,

I'm recently added voip on our services using ser.

i bill my users using the time of INVITE and BYE. but got a complain 
from one of my users, why even if the call was not answered they still 
get billed,

what can i use on ser to check whether a call has been answered or not, 
then i will bill only base on the answered call.

Thanks in advanced.

Regards,

Ron