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Cisco IP Phone Administration Guide for Cisco CallManager 3.2, Cisco IP Phones 7960/7940/7910
78-10453-04
Chapter 7 Troubleshooting the Cisco IP Phone
Resolving Startup Problems
Symptom: Cisco IP Phone Not Registering with
Cisco CallManager
If the phone proceeds past the first stage (LED buttons flashing on and off) and
continues to cycle through the messages displaying on the LCD screen, then the
phone is not starting up properly.The phone cannot successfully start up unless it
is connected to the Ethernet network and it has registered with a
Cisco CallManager server.
These sections can assist you in determining the reason the phone is unable to start
up properly:
• Identifying Error Messages, page 7-17
• Registering the Phone with Cisco CallManager, page 7-18
• Checking Network Connectivity, page 7-18
• Verifying TFTP Server Settings, page 7-18
• Verifying IP Addressing and Routing, page 7-19
• Verifying DNS Settings, page 7-19
• Verifying Cisco CallManager Settings, page 7-20
• Cisco CallManager and TFTP Services Are Not Running, page 7-20
• Creating a New Configuration File, page 7-21
Identifying Error Messages
As the phone is cycling through the startup process, you can access status
messages that might provide you with information about the cause of the problem.
On the Cisco IP Phone 7960/7940, press settings > Status > Status Messages to
display these errors and refer to the “Viewing Status Messages” section on
page 7-3 section for a list of potential errors and their explanations and solutions.