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Cisco 7931G Manual

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9-3
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 6.1
OL-14587-01
Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
–
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.
–
Switch the external power supply with a unit that you know to be
functional.
–
If you are using a in-line power, make sure that the phone is connected to
a switch that supports IEEE 802.3af Class 3. For more information, see
the
“Providing Power to the Phone” section on page 2-4.
3. If the phone still does not start up properly, power up the phone with the
handset off-hook. When the phone is powered up in this way, it attempts to
launch a backup software image.
4. If the phone still does not start up properly, perform a factory reset of the
phone. For instructions, see the
“Performing a Factory Reset” section on
page 9-20.
If after attempting these solutions, the 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.
Symptom: The Cisco Unified 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 displaying on the
phone 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 Communications Manager server.
These sections can assist you in determining the reason the phone is unable to start
up properly:
• Identifying Error Messages, page 9-4
• Checking Network Connectivity, page 9-4
• Verifying TFTP Server Settings, page 9-4
• Verifying IP Addressing and Routing, page 9-5
• Verifying DNS Settings, page 9-5
… 213 …


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