This information is also available locally on the phone under Applications > Admin settings > Status > Call statistics.
For more information, see the Troubleshooting the Cisco IP Phone 8800 Series chapter in the Cisco IP Phone 8800 Series
Administration Guide at this URL:
http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-8800-series/products-maintenance-guides-
list.html
Device Logs
Console logs, core dumps, status messages, and debug display can be obtained from the web interface of Cisco IP Phone 8800
Series for troubleshooting purposes.