Figure 2 shows the directory structure for the final CDR files.

Figure 2 Directory structure for the final CDR files
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The final CDR files are stored in two copies under e:\backsave\.

• Under e:\backsave\, the first copies of the final CDR files are stored in the corresponding date folders contained in the channel folders of the access point folders.
• Under e:\backsave\Second\, the second copies of the final CDR files are stored in the corresponding channel folders contained in access point folders.

The second copies of the final CDR files are open to the BS. After the BS fetches these files, these files are immediately deleted from the folders under e:\backsave\Second\.

The name of a final CDR file takes the format of b*.dat. The asterisk (*) indicates a CDR serial number (1 MB default). The value ranges from 00000001 to 99999999.

Final CDR is used for billing center & this is very much important...........

Very good Resource............