Cisco 7942G - Unified IP Phone VoIP Probleemoplossing en onderhoud - Pagina 11

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Troubleshooting and Maintenance

802.1X Not Enabled

Problem

The phone does not have 802.1X configured.

Cause

These errors typically indicate that 802.1X is not enabled on the phone.

Solution

To enable it, see

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.

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.

• If the shared secret is not configured, enter it, and ensure that it matches the shared secret on the

authentication server.

Security Configuration Menu

for information on enabling 802.1X on the phone.

Troubleshooting and Maintenance

802.1X Not Enabled