Symptom: The Cisco Unified Ip Phone Does Not Register With Cisco Unified Callmanager; Registering The Phone With Cisco Unified Callmanager - Cisco 7906G Administration Manual

Chapter 9 Troubleshooting and Maintenance
Symptom: The Cisco Unified IP Phone Does Not Register with
Cisco Unified CallManager
Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager
OL-10008-01
Verify that the phone is receiving power:
2.
If you are using external power, 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 the phone still does not start up properly, power up the phone with the
3.
handset off-hook. When the phone is powered up in this way, it attempts to
launch a backup software image.
If the phone still does not start up properly, perform a factory reset of the
4.
phone. For instructions, see the
page 9-16.
If after attempting these solutions, the LCD screen on the Cisco Unified IP Phone
does not display any characters after at least five minutes, 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 Unified CallManager server.
These sections can assist you in determining the reason the phone is unable to start
up properly:
Identifying Error Messages, page 9-4
•
Registering the Phone with Cisco Unified CallManager, page 9-4
•
Checking Network Connectivity, page 9-4
•
Verifying TFTP Server Settings, page 9-5
•
Verifying IP Addressing and Routing, page 9-5
•
• Verifying DNS Settings, page 9-6
Verifying Cisco Unified CallManager Settings, page 9-6
•
Resolving Startup Problems
"Performing a Factory Reset" section on
9-3