Third Party Call Accounting and Billing

Good Day,

I am seeking assistance in getting information on a third party vendor or a commercially supported or any supported method of getting Call Accounting/Billing information from the FreePBX/Sangoma Appliances. That is, the ability to calculate on a monthly or on demand usage, the CDR mapped to tolls, independent of Service Provider. In a way it is to keep the Service Providers honest. Can anyone point me in the right direction? Any guidance would be greatly appreciated. Thank you.


I found out that A2Billing and Star2Billing may be the go to solutions. Does anyone here have any insight into these products as it seems there is a security consideration regarding A2Billing. Thanks.