Cisco Unified Communications Manager And Tftp Services Are Not Running; Phone Is Not Configured In Cisco Unified Communications Manager; Configuration File Corruption; Phone Reset Problems - Cisco 8821 Administration Manual

Configuration File Corruption

Cisco Unified Communications Manager and TFTP Services Are Not Running

Problem
If the Cisco Unified Communications Manager 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 Unified Communications Manager 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

Phone is Not Configured in Cisco Unified Communications Manager

Problem
The phone is not registered with the Cisco Unified Communications Manager
Solution
A phone can register with a Cisco Unified Communications Manager server only if the phone is added to the
server or if autoregistration is enabled.
To verify that the phone is in the Cisco Unified Communications Manager database, choose Device > Phone
from Cisco Unified Communications Manager Administration. Click Find to search for the phone based on
the MAC Address. For information about determining a MAC address, see
the Phone, on page
If the phone is already in the Cisco Unified Communications Manager database, the configuration file may
be damaged. See
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.

Phone Reset Problems

If users report that their phones are resetting during calls or while the phones are idle, you should investigate
the cause. If the network connection and Cisco Unified Communications Manager connection are stable, a
phone should not reset.
Cisco Wireless IP Phone 8821 and 8821-EX Administration Guide for Cisco Unified Communications Manager
118
Start Service, on page
39.
Configuration File Corruption, on page 118
127.
Determine the MAC Address of
for assistance.
Troubleshooting