Chapter 9 Troubleshooting and Maintenance
Troubleshooting Cisco Unified IP Phone Security
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Cisco Unified IP Phone 7906G and 7911G Administration Guide for Cisco Unified CallManager
OL-10008-01
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 CallManager Security Guide.
General Troubleshooting Tips
This section provides troubleshooting information for some common issues that
might occur on the Cisco Unified IP Phone.
Table 9-1 Cisco Unified IP Phone Security Troubleshooting
Problem Possible Cause
Device authentication error. CTL file does not have a
Cisco Unified CallManager certificate or
has an incorrect certificate.
Phone cannot authenticate CTL file. The security token that signed the
updated CTL file does not exist in the
CTL file on the phone.
Phone cannot authenticate any of the
configuration files other than the
CTL file.
Invalid TFTP record.
Phone reports TFTP authorization
failure.
• The TFTP address for the phone does
not exist in the CTL file.
• If you created a new CTL file with a
new TFTP record, the existing CTL
file on the phone may not contain a
record for the new TFTP server.
Phone does not register with
Cisco Unified CallManager.
The CTL file does not contain the correct
information for the
Cisco Unified CallManager server.
Phone does not request signed
configuration files.
The CTL file does not contain any TFTP
entries with certificates.
