Cisco Ip Phone Does Not Register With Cisco Unified Communications Manager - Cisco 8811 Administration Manual

Startup Problems
• After you attempt these solutions, if the phone screen on the Cisco IP Phone does not display any
characters after at least five minutes, contact a Cisco technical support representative for additional
assistance.
Related Topics
Phone Startup Verification, on page 65

Cisco IP Phone Does Not Register with Cisco Unified Communications Manager

If the phone proceeds past the first stage of the startup process (LED buttons flashing on and off) but continues
to cycle through the messages that displays on the phone screen, the phone is not starting up properly. The
phone cannot successfully start up unless it connects to the Ethernet network and it registers with a Cisco
Unified Communications Manager server.
In addition, problems with security may prevent the phone from starting up properly. See
Procedures, on page 249
Phone Displays Error Messages
Problem
Status messages display errors during startup.
Solution
While the phone cycles through the startup process, you can access status messages that might provide you
with information about the cause of a problem.
Related Topics
Display Status Messages Window, on page 203
Phone Cannot Connect to TFTP Server or to Cisco Unified Communications Manager
Problem
If the network is down between the phone and either the TFTP server or Cisco Unified Communications
Manager, the phone cannot start up properly.
Solution
Ensure that the network is currently running.
Phone Cannot Connect to TFTP Server
Problem
The TFTP server settings may not be correct.
Cisco IP Phone 8800 Series Administration Guide for Cisco Unified Communications Manager
240
for more information.
Troubleshooting