Cisco 8831NR Administration Manual page 82

Set 802.1X Device Authentication
Set 802.1X Device Authentication
Procedure
Step 1 ChooseApps > Admin Settings > Security Config > 802.1X Authentication > Device Authentication.
Step 2
Press Edit.
Step 3 Set the Device Authentication option to Enabled or Disabled.
The default value is Disabled.
Step 4
Press Save.
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
72
Cisco Unified IP Conference Phone Settings