Our voip billing consists of asp.net and mysql. We need to modify the CDRs generated by the billing. Specific requirement is to have an option to increase the duration of the call by certain percentage.
for example if the actual duration of the call = 5 minutes (300 seconds). than increasing the duration by 20% would make the duration 375 seconds and the customer should be billed according to the increased duration. this option should not affect the billing block which could be 1/1 or 30/6 or 30/30 or 60/60 ,etc.