All it will need to do is take the CDR and add our cost per min to it and input it into a mySQL database daily with all the CDR details and the new cost field. Trying to keep it simple to keep cost of development down since we are just a small start up.
If you are looking for billing I may be able to
help you. Our company has developed over the
last 4 years complete voip billing software that
we have now integrated with Asterisk. Currently
we are integrating it with Ensim so that we can
duplicate our local telco platforms on the fly.
We develop Call Accounting Mate! (approx. 375.00 usd) for Asterisk. You can rate the calls any way you like and retrieve the data in PDF, XML, Excel or other formats.