Checking Power Connection; Troubleshooting Cisco Unified Ip Phone Security - Cisco 7970G Administration Manual

Troubleshooting Cisco Unified IP Phone Security

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.
Phone cannot authenticate any of the
configuration files other than the CTL file.
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.1 (SIP), Cisco Unified IP Phones
9-12
From Cisco Unified CallManager, 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
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 CallManager Security Guide.
Chapter 9
Possible Cause
CTL file does not have a Cisco Unified CallManager
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.
Bad TFTP record.
Troubleshooting and Maintenance
"Determining the MAC
2-20.
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