Specifications

9-3
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 8.0
OL-21033-01
Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
• Verifying DNS Settings, page 9-4
• Verifying Cisco Unified Communications Manager Settings, page 9-4
• Cisco CallManager and TFTP Services Are Not Running, page 9-4
• Creating a New Configuration File, page 9-5
Identifying Error Messages
As the phone cycles through the startup process, you can access status messages that might provide you
with information about the cause of a problem. See Status Messages Screen, page 7-3 for instructions
about accessing status messages and for a list of potential errors, their explanations, and their solutions.
Registering the Phone with Cisco Unified Communications Manager
A Cisco Unified IP Phone can register with a Cisco Unified Communications Manager server only if the
phone has been added to the server or if auto-registration is enabled. Review the information and
procedures in the Adding Phones to the Cisco Unified Communications Manager Database, page 2-7 to
ensure that the phone has been added to the Cisco Unified Communications Manager database.
To verify that the phone is in the Cisco Unified Communications Manager database, choose Device >
Find from Cisco Unified Communications Manager Administration to search for the phone based on its
MAC Address. For information about determining a MAC address, see Determining the MAC Address
of a Cisco Unified IP Phone, page 2-11.
If the phone is already in the Cisco Unified Communications Manager database, its configuration file
may be damaged. See Creating a New Configuration File, page 9-5 for assistance.
Checking Network Connectivity
If the network is down between the phone and the TFTP server or Cisco Unified Communications
Manager, the phone cannot start up properly. Ensure that the network is currently running.
Verifying TFTP Server Settings
You can determine the IP address of the TFTP server used by the phone by pressing the Settings button
on the phone, choosing IPv4 > Network Configuration, and scrolling to the TFTP Server 1 option.
If you have assigned a static IP address to the phone, you must manually enter a setting for the TFTP
Server 1 option. See Network Configuration Menu, page 4-5.
If you are using DHCP, the phone obtains the address for the TFTP server from the DHCP server. Check
the IP address configured in Option 150.
You can also enable the phone to use an alternate TFTP server. Such a setting is particularly useful if the
phone was recently moved from one location to another. See Network Configuration Menu, page 4-5 for
instructions.
Verifying IP Addressing and Routing
You should verify the IP addressing and routing settings on the phone. If you are using DHCP, the DHCP
server should provide these values. If you have assigned a static IP address to the phone, you must enter
these values manually.