This presentation describes very briefly the three options for CDR collection in UC500:
1) using a Syslog Server (Easy implementation)
2) Using an FTP Server (Easy and Reliable Implementation)
3) Using a Radius Server (Advanced Implementation)
Advantages and disadvantages of each one are discussed.
Details about CDR implementation, CDR fields and attributes can be found on:
http://www.cisco.com/en/US/docs/ios/voice/cdr/developer/guide/cdrcsv.html#wp1163208