Call by Call Statistics Report

[LittleGremlins]

Does anyone know if there is any reference material for this report. I have checked several NTPs, however, they do not explain what the report is displaying. For example, we have had numerous calls start with one call ID then for some unknown reason split off to another call ID only to return back to the original call ID to complete the call.
Thanks.

 

[sandyml]

If you send a call out of the system for any reason (like to another CDN), it will temporarily lose its first ID, be assigned a new ID, then revert back to its original ID