Cisco Unified Communications Manager (CUCM) provides the ability to manually export calls using what they call CAR (CDR Analysis and Reporting).  You can use this system to pull calls out of CUCM and push them into VoIP Detective.  Here is the process

  1. Go to CUCM -> Cisco Unified Serviceability -> Tools -> CDR Analysis and Reporting
  2. CDR -> Export CDR/CMR
  3. And select about a week worth of calls, then click "Export to File"
  4. You'll then be prompted to download the CDR and CMR files
  5. We must keep all files under 50mb to avoid overwhelming VoIP Detective when we import.  I recommend trying to export a week at a time, however if  you have a very busy CUCM, and the files are >50mb, you may need to break it up by day.
  6. You'll be able to download both CDR and CMR files, and they will be presented as .txt files.  Save these locally on your PC.  
  7. The process to import these files into VoIP Detective can be found here: Import files manually into VoIP Detective

Note - Empty exports

CUCM stores a relatively small amount of CDRs, so it is very easy to request records that have already been purged (i.e. that do not exist).  CUCM will not alert you to this, but will instead serve up files that only contain headers, but no data.  The easiest way to test this is to open the CDR file in notepad, and see if it only contains headers.  Below is an example of a CDR files with no actual call data in it.