Cisco 7912G User Manual
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7-3
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SIP), Cisco Unified IP Phones
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Chapter 7 Troubleshooting the Cisco Unified IP Phone
Resolving Startup Problems
2.
Verify that the phone is receiving power:
–
Verify that the electrical outlet is functional.
–
If you are using in-line power, try using 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 phone still does not start up, contact a
Cisco technical support representative for additional assistance.
Symptom: The Cisco Unified IP Phone Does Not Register with
Cisco Unified CallManager
If a phone proceeds past the first stage (LED buttons flashing on and off), and, on
a Cisco Unified IP Phone 7905G and 7912G, 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:
•
Registering the Phone with Cisco Unified CallManager, page 7-4
•
Checking Network Connectivity, page 7-4
•
Verifying TFTP Server Settings, page 7-4
•
Verifying IP Addressing and Routing, page 7-5
•
Verifying DNS Settings, page 7-5
•
Verifying Cisco Unified CallManager Settings, page 7-6
•
Cisco Unified CallManager and TFTP Services Are Not Running, page 7-6
•