Possible Explanation and Action
Description
Message
Verify that the host names of the TFTP server or
Cisco Unified Communications Manager are
configured properly in IPv6 DNS.
Consider using IPv6 addresses rather than host
names
IPv6 DNS could not resolve the name of
the TFTP server or Cisco Unified
Communications Manager.
DNS unknown IPv6 Host
Occurs if you attempted to install a version of
software on this phone that did not support
hardware changes on this phone.
Check the load ID that is assigned to the phone
(from Cisco Unified Communications Manager,
choose
Device
>
Phone
). Reenter the load that
displays on the phone.
The application that was downloaded is
not compatible with the phone hardware.
Load Rejected HC
If the phone has a static IP address, verify that the
default router is configured.
If you are using DHCP, the DHCP server has not
provided a default router. Check the DHCP server
configuration.
DHCP or static configuration did not
specify a default router.
No Default Router
If the phone has a static IP address, verify that the
IPv4 DNS server is configured.
If you are using DHCP, the DHCP server has not
provided a IPv4 DNS server. Check the DHCP
server configuration.
A name was specified but DHCP or static
IP configuration did not specify a IPv4
DNS server address.
No IPv4 DNS Server
If the phone has a static IP address, verify that the
IPv6 DNS server is configured.
If you are using DHCP, the DHCP server has not
provided a IPv6 DNS server. Check the DHCP
server configuration.
A name was specified but DHCP or static
IP configuration did not specify a IPv6
DNS server address.
No IPv6 DNS Server
The trust list is not configured on the Cisco
Unified Communications Manager, which does
not support security by default.
The trust list is not configured.
The CTL file or the ITL file is not
installed on the phone.
No Trust List Installed
Update the certificate.
FIPS requires that the RSA server
certificate is 2048 bits or greater.
Phone failed to register. Cert key size
is not FIPS compliant.
Configuration changes were likely made to the
phone in Cisco Unified Communications
Manager, and
Apply Config
was pressed so that
the changes take effect.
The phone is restarting due to on a
request from Cisco Unified
Communications Manager.
Restart requested by Cisco Unified
Communications Manager
Cisco IP Phone 7800 Series Administration Guide for Cisco Unified Communications Manager
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Cisco IP Phone Status