Cisco 7911G - IP Phone VoIP User Manual

9-13
Cisco Unified IP Phone 7906G and 7911G for Cisco Unified Communications Manager 6.0
OL11954-01
Chapter 9 Troubleshooting and Maintenance
Troubleshooting Cisco Unified IP Phone Security
Table 9-1 Cisco Unified IP Phone Security Troubleshooting
Problem Possible Cause
Device authentication error. CTL file does not have a
Cisco Unified Communications Manager
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 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.

Cisco 7911G - IP Phone VoIP Specifications

General

Brand	Cisco
Model	7911G - IP Phone VoIP
Category	IP Phone
Language	English