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Introduction

CDRator's billing functionality is designed to generate Invoice Detail Lines based on CDR information received from the network.

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In that case the bundle's rating logic is involved in the process:

1. the price (invoice detail lines) by standard configuration is input to the bundle rating;
2. the output of the bundle rating depends on the bundle itself, but generally can be:
   1. an updated version of the original invoice detail line (e.g. zero-rated or 50% discounted)
   2. an updated version of the original invoice detail line with a new public representation (e.g. the discounted phone calls are listed under a new invoice level which contains only the discounted lines)
   3. the same original price plus another invoice detail line which gives the subscriber a credit of the same amount
   4. the original price if e.g. the customer has finished the bonus

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