The Authentication Code (Auth Code) feature of CDR2Cloud provides a very accurate and flexible way for you to identify which customer each call in your CDR file should be billed to.
Every record (line) in your CDR file represents a call that was made through your network by a customer. In processing your CDR file(s) you are now trying to review each record (line) and figure out:
Which customer made the call
How much to charge for the call
The Auth Code feature gives you the resources you will need to accurately solve the challenge of 1. - Which customer made the call.
Auth Codes utilize a very powerful feature called Regular Expressions (RegEx) which is simply a way of defining a sequence of characters that for a search pattern.