Cisco 7912G - Manual (Page 108)

Chapter 7 Troubleshooting the Cisco Unified IP Phone
Resolving Startup Problems
7-4
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SIP), Cisco Unified IP Phones
OL-8131-01
Registering the Phone with Cisco Unified CallManager
A Cisco Unified IP Phone can register with a Cisco Unified CallManager server
only if the phone has been added to the server or if auto-registration for SIP is
enabled. Review the information and procedures in the
“Adding Phones to the
Cisco Unified CallManager Database” section on page 2-12 to ensure that the
phone has been added to the Cisco Unified CallManager database.
To verify that the phone is in the Cisco Unified CallManager database, choose
Device > Phone > Find from Cisco Unified CallManager Administration to
search for the phone based on its MAC Address. (To determine the MAC address
of a phone, see the
“Determining the MAC Address of a Cisco Unified IP Phone”
section on page 2-12 .)
If the phone is already in the Cisco Unified CallManager database, its
configuration file may be damaged. See the
“Creating a New Configuration File”
section on page 7-7 for assistance.
Checking Network Connectivity
If the network is down between the phone and the TFTP server or
Cisco Unified CallManager, the phone cannot start up properly. Ensure that the
network is currently running.
Verifying TFTP Server Settings
The Cisco Unified IP Phone uses the TFTP server setting to identify the primary
TFTP server used by the phone. If this setting is incorrect, the Cisco Unified IP
Phone may continually cycle while attempting to contact the identified TFTP
Server.
If you have assigned a static IP address to the phone, you must manually enter this
setting.
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.
For information about determining and changing TFTP server settings, see
Chapter 4, “Configuring Settings on the Cisco Unified IP Phone,” or
Appendix A, “Reference List of Parameters.”