Cisco Ip Phone 8800 Series Administration Guide For Cisco Unified Communications Manager - Cisco 8800 Series Administration Manual

Cisco IP Phone Status
Message
Could not acquire an IP address from
DHCP
CTL and ITL installed
CTL Installed
CTL update failed
DHCP timeout
DNS timeout
DNS unknown host
Duplicate IP
Erasing CTL and ITL files

Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager

256
Description
The phone has not previously obtained an
IP address from a DHCP Server. This can
occur when you perform an out of box or
factory reset.
The CTL and ITL files are installed on the
phone.
A certificate trust list (CTL) file is installed
in the phone.
The phone could not update the certificate
trust list (CTL) file.
DHCP server did not respond.
DNS server did not respond.
DNS could not resolve the name of the TFTP
server or Cisco Unified Communications
Manager.
Another device is using the IP address that
is assigned to the phone.
Erasing CTL or ITL file.
Possible explanation and action
Confirm that the DHCP server is available
and that an IP address is available for the
phone.
None. This message is informational only.
Neither the CTL file nor the ITL file was
installed previously.
None. This message is informational only.
The CTL file was not installed previously.
Problem with the CTL file on the TFTP
server.
Network is busy: The errors should resolve
themselves when the network load reduces.
No network connectivity between the DHCP
server and the phone: Verify the network
connections.
DHCP server is down: Check configuration
of DHCP server.
Errors persist: Consider assigning a static IP
address.
Network is busy: The errors should resolve
themselves when the network load reduces.
No network connectivity between the DNS
server and the phone: Verify the network
connections.
DNS server is down: Check configuration of
the DNS server.
Verify that the host names of the TFTP server
or Cisco Unified Communications Manager
are configured properly in DNS.
Consider using IP addresses rather than host
names
If the phone has a static IP address, verify that
you did not assigned a duplicate IP address.
If you are using DHCP, check the DHCP
server configuration.
None. This message is informational only.