Checking Power Connection; Troubleshooting Cisco Unified Ip Phone Security - Cisco 7931G - Unified IP Phone VoIP Administration Manual

Troubleshooting Cisco Unified IP Phone Security

Step 3
Step 4
Step 5
Step 6

Checking Power Connection

Troubleshooting Cisco Unified IP Phone Security
Table 9-1 Cisco Unified IP Phone Security Troubleshooting
Problem
CTL File Problems
Device authentication error.
Phone cannot authenticate CTL file.
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 6.0
9-12
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.
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.
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
the MAC Address of a Cisco Unified IP Phone" section on page
Power cycle the phone.
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.
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.
Chapter 9
Possible Cause
CTL file does not have a Cisco Unified
Communications Manager certificate or has an
incorrect certificate.
The security token that signed the updated CTL file
does not exist in the CTL file on the phone.
Troubleshooting and Maintenance
"Determining
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