Extension Summary v2

The Extension Summary (/extsum) report provides a detailed summary of call activity for any user’s extension in your enterprise’s phone system. When you integrate with the /extsum endpoint you can see aggregate call volume and how calls were handled at every user level regardless of how the call arrived at the extension.
Using this report, you can track an employee’s number of answered, abandoned, and missed calls for productivity evaluation. You can sort historical data according to the total number of received calls and compare it to the users who are handling them. See Extension Summary Glossary for details