Solution
To enable it, see Security Configuration Menu, on page 99 for information on enabling 802.1X on the phone.
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, you have two options:
•
Temporarily disable 802.1X on the switch.
•
Temporarily move the phone to a network environment that is not using 802.1X authentication.
After the phone starts up normally in one of these conditions, you can access the 802.1X configuration menus
and re-enter the shared secret.
Audio and Video Problems
The following sections describe how to resolve audio and video problems.
Phone Display Is Wavy
Problem
The display appears to have rolling lines or a wavy pattern.
Cause
The phone might be interacting with certain types of older fluorescent lights in the building.
Solution
Move the phone away from the lights or replace the lights to resolve the problem.
No Speech Path
Problem
One or more people on a call do not hear any audio.
Cisco Unified IP Phone 7941G, 7941G-GE, 7942G, 7961G, 7961G-GE, and 7962G Administration Guide for Cisco
Unified Communications Manager 9.0 (SCCP and SIP)
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Troubleshooting and Maintenance
Audio and Video Problems
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