Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
9-6
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
OL11954-01
Verifying DNS Settings
If you are using DNS to refer to the TFTP server or to
Cisco Unified Communications Manager, you must ensure that you have
specified a DNS server. Verify this setting by pressing the Applications Menu
button and selecting Settings > Network Configuration > DNS Server 1. You
should also verify that there is a CNAME entry in the DNS server for the TFTP
server and for the Cisco Unified Communications Manager system.
You must also ensure that DNS is configured to do reverse look-ups.
Windows2000 is configured by default only to perform forward look-ups.
Verifying Cisco Unified Communications Manager Settings
On the Cisco Unified IP Phone, press the Applications Menu button and select
Settings > Network Configuration > Communications Manager 1–5. The
Cisco Unified IP Phone attempts to open a TCP connection to all the
Cisco Unified Communications Manager servers that are part of the assigned
Cisco Unified Communications Manager group. If none of these options contain
IP addresses or show Active or Standby, the phone is not properly registered with
Cisco Unified Communications Manager. See the “Registering the Phone with
Cisco Unified Communications Manager” section on page 9-4 for tips on
resolving this problem.
Cisco Unified Communications Manager and TFTP Services Are Not Running
If the Cisco Unified Communications Manager or TFTP services are not running,
phones may not be able to start up properly. However, in such a situation, it is
likely that you are experiencing a system-wide failure and that other phones and
devices are unable to start up properly.
If the Cisco Unified Communications Manager service is not running, all devices
on the network that rely on it to make phone calls will be affected. If the TFTP
service is not running, many devices will not be able to start up successfully.
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