This information is also available locally on the phone under Settings > Status > Call Statistics or if on a phone call press the
center button twice.
For more information, see the "Troubleshooting the Cisco Unified Wireless IP Phone 7925G" chapter in the Cisco Unified
Wireless IP Phone 7925G Administration Guide at this URL:
http://www.cisco.com/en/US/products/hw/phones/ps379/prod_maintenance_guides_list.html
Cisco Unified Wireless IP Phone 7925G Deployment Guide
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