Symptom: The Cisco Ip Phone Does Not Register With Cisco Callmanager; Identifying Error Messages; Registering The Phone With Cisco Callmanager - Cisco 7960G Administration Manual

Chapter 8 Troubleshooting the Cisco IP Phone
Symptom: The Cisco IP Phone Does Not Register with
Cisco CallManager
Cisco IP Phone Administration Guide for Cisco CallManager 4.0, Cisco IP Phones 7960G/7940G
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Verify that the phone is receiving power:
2.
Verify that the electrical outlet is functional.
–
If you are using in-line power, use the external power supply instead.
–
If you are using the external power supply, switch with a unit that you
–
know to be functional.
If after attempting these solutions, the LCD screen on the Cisco IP Phone does not
display any characters after at least five minutes, perform a factory reset of the
phone (see the "Performing a Factory Reset" section on page
still does not display characters, contact a Cisco technical support representative
for additional assistance.
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 displaying on the
LCD screen, 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 8-4
•
Registering the Phone with Cisco CallManager, page 8-4
•
Checking Network Connectivity, page 8-4
•
Verifying TFTP Server Settings, page 8-5
•
Verifying IP Addressing and Routing, page 8-5
•
Verifying DNS Settings, page 8-6
•
Verifying Cisco CallManager Settings, page 8-6
•
Cisco CallManager and TFTP Services Are Not Running, page 8-6
•
Creating a New Configuration File, page 8-7
•
Resolving Startup Problems
8-19). If the phone
8-3