I too need help with this desperately. I have found how to export the call log, but here is the problem:
1. When you export to excel, you cannot SUM the elapsed time. For some reason, excel doesn't recognize xx:xx:xx as hh:mm:ss
2. I need to extract reports and isolate specific numbers and calculate my costs to call those numbers. Then I need to change my costs to compare future calling plans to streamline my expenses. From what I can see, once the log calculates the call cost, it won't go back and recalculate.
3. The billing doesn't seem to work, because I cannot set a 'local unlimited' rate.
I have been using 3CX for several years, and these have been recurring issues. I don't see why they don't have call log analysis built directly into the windows management console.
-Bob