Cisco Systems 8841 Manual De Usuario

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, on page 263

General Telephone Call Problems

The following sections help troubleshoot general telephone call problems.

Phone Call Cannot Be Established

Problem

A user complains about not being able to make a call.

Cause

The phone does not have a DHCP IP address, is unable to register to Cisco Unified Communications Manager.
Phones with an LCD display show the message Configuring IP or Registering. Phones without an
LCD display play the reorder tone (instead of dial tone) in the handset when the user attempts to make a call.

Solution

Verify the following:

The Ethernet cable is attached.

The Cisco CallManager service is running on the Cisco Unified Communications Manager server.

Both phones are registered to the same Cisco Unified Communications Manager.

Cisco IP Phone 8811, 8841, 8851, and 8861 Administration Guide for Cisco Unified Communications Manager 10.5

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General Telephone Call Problems