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Cisco Unified IP Phone 7970G/7971G-GE for Cisco Unified Communications Manager 6.0
OL-12232-01
Chapter 9 Troubleshooting and Maintenance
Troubleshooting Cisco Unified IP Phone Security
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.
Bad 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 Communications
Manager.
The CTL file does not contain the
correct information for the
Cisco Unified Communications
Manager server.
Phone does not request signed
configuration files.
The CTL file does not contain any
TFTP entries with certificates.
Table 9-1 Cisco Unified IP Phone Security Troubleshooting (continued)
Problem Possible Cause
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