Factory Reset Of Phone Has Deleted 802.1X Shared Secret - Cisco 9971 Administration Manual

Cause
These errors typically indicate that 802.1X authentication is not enabled on the phone.
Solution
If 802.1X is not enabled on the phone, see 802.1X Authentication section.

Factory Reset of Phone Has Deleted 802.1X Shared Secret

Problem
After a reset, the phone does not authenticate.
Cause
These errors typically indicate that the phone has completed a factory reset while 802.1X was enabled. A
factory reset deletes the shared secret, which is required for 802.1X authentication and network access.
Solution
To resolve this situation, temporarily move the phone to a network environment that is not using 802.1X
authentication. After the phone starts up normally, access the 802.1X configuration menus to enable device
authentication and to reenter the shared secret. See 802.1X Authentication section for details.
Related Topics
Basic Reset
Camera, Audio, and Video Problems
The following sections describe how to resolve camera, audio, and video problems.
No Video
Problem
The phone does not detect the camera or no picture appears on the screen.
Solution
Check the following conditions:
• Verify that the camera is connected properly by unplugging and reconnecting the camera to the phone.
• Verify that video is enabled in Cisco Unified Communications Manager.
• Check the resolution of the transmitting endpoint. Cisco Unified IP Phone 8961, 9951, and 9971 does
• Verify that packets are being received. Check the Rcvr Packets (would be zero in this case) in
not display videos that use a resolution higher than VGA. If the other endpoint transmits at a resolution
greater than VGA, such a transmission results in a black screen.
Administrator Settings > Status > Call Statistics > Video > Video Statistics.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
Camera, Audio, and Video Problems
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