Chapter 9 Troubleshooting and Maintenance
Troubleshooting Cisco Unified IP Phone Security
9-12
Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Cisco Unified Communications Manager 6.1
OL-14620-01
Checking Power Connection
In most cases, a phone will restart if it powers up by using external power but loses
that connection and switches to PoE. Similarly, a phone may restart if it powers
up by 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 and
encryption, refer to
Cisco Unified Communications Manager Security Guide
.
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.
There is a 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.
Summary of Contents for 7941G - Unified IP Phone VoIP
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