Solution
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. See
Verify DNS Settings, on page 229
.
Cisco Unified Communications Manager Settings on Phone
Problem
The phone may have the wrong Cisco Unified Communications Manager information.
Solution
On the Cisco Unified IP Phone, press the
Settings
button, choose
Device Configuration
, and look at the
Unified CM Configuration options. 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
Cisco Unified Communications Manager
Phone Registration, on page 218
for tips on resolving this problem.
Cisco CallManager and TFTP Services Are Not Running
Problem
If the Cisco CallManager or TFTP services are not running, phones may not be able to start up properly. In
such a situation, it is likely that you are experiencing a systemwide failure, and other phones and devices are
unable to start up properly.
Solution
If the Cisco CallManager service is not running, all devices on the network that rely on it to make phone calls
are affected. If the TFTP service is not running, many devices cannot start up successfully. For more
information, see
Start Service, on page 230
.
Configuration File Corruption
Problem
If you continue to have problems with a particular phone that other suggestions in this chapter do not resolve,
the configuration file may be corrupted.
Solution
Create a new phone configuration file. See
Create New Phone Configuration File, on page 229
.
Cisco Unified Communications Manager Phone Registration
Problem
The phone is not registered with Cisco Unified Communications Manager.
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
218
Troubleshooting and Maintenance
Startup Problems