The Enterprise Overview Report on either our TIM Plus or TIM Enterprise product would show you this. You can download a free trial if you want to play with it. If logging less than 400 directory numbers, try TIM Plus, if more than that try TIM Enterp...
The Cisco UCME / UC500 can be configured to send RADIUS or SysLog events. RADIUS recommended. Feel free to use info in these docs:http://docs.tri-line.com/pages/viewpage.action?pageId=4817083
