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Chapter 9 Troubleshooting and Maintenance
Troubleshooting Cisco Unified IP Phone Security
9-12
Cisco Unified IP Phone 7970G/7971G-GE for Cisco Unified Communications Manager 6.0
OL-12232-01
Step 3 On the Cisco Unified Communications Manager server, verify that the local host
files have the correct Cisco Unified Communications Manager server name
mapped to the correct IP address.
Step 4 From Cisco Unified Communications Manager, choose System > Server and
verify that the server is referred to by its IP address and not by its DNS name.
Step 5 From Cisco Unified Communications Manager, choose Device > Phone and
verify that you have assigned the correct MAC address to this Cisco Unified IP
Phone. For information about determining a MAC address, see the “Determining
the MAC Address of a Cisco Unified IP Phone” section on page 2-20.
Step 6 Power cycle the phone.
Checking Power Connection
In most cases, a phone will restart if it powers up using external power but loses
that connection and switches to PoE. Similarly, a phone may restart if it powers
up using PoE and then gets connected to an external power supply.
Troubleshooting Cisco Unified IP Phone Security
Table 9-1 provides troubleshooting information for the security features on the
Cisco Unified IP Phone. For information relating to the solutions for any of these
issues, and for additional troubleshooting information about security, refer to
Cisco Unified Communications Manager Security Guide.
Table 9-1 Cisco Unified IP Phone Security Troubleshooting
Problem Possible Cause
CTL File Problems
Device authentication error. CTL file does not have a
Cisco Unified Communications
Manager certificate or has an incorrect
certificate.
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