Cisco 7821 Administration Manual page 166

Cisco IP Phone Status
Message
No Trust List installed
Restart requested by Cisco Unified
Communications Manager
TFTP access error
TFTP error
TFTP timeout
Timed Out
Cisco IP Phone 7821, 7841, and 7861 Administration Guide for Cisco Unified Communications Manager 10.0
(SIP)
152
Description
The CTL file or the ITL file is not
installed on the phone.
The phone is restarting due to on a
request from Cisco Unified
Communications Manager.
TFTP server is pointing to a directory
that does not exist.
The phone does not recognize an error
code that the TFTP server provided.
TFTP server did not respond.
Supplicant attempted 802.1X transaction
but timed out to due the absence of an
authenticator.
Possible explanation and action
The trust list is not configured on the Cisco
Unified Communications Manager, which does
not support security by default.
For more information about the trust list, see the
Cisco Unified Communications Manager Security
Guide.
Configuration changes were likely made to the
phone in Cisco Unified Communications
Manager, and Apply was pressed so that the
changes take effect.
If you are using DHCP, verify that the DHCP
server is pointing to the correct TFTP server.
If you are using static IP addresses, check
configuration of TFTP server.
Contact Cisco TAC.
Network is busy: The errors should resolve
themselves when the network load reduces.
No network connectivity between the TFTP server
and the phone: Verify the network connections.
TFTP server is down: Check configuration of
TFTP server.
Authentication typically times out if 802.1X is
not configured on the switch.