Cisco 7961G-GE - IP Phone VoIP User Manual

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 6.0
OL-11953-01
Step 3 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.
Step 4 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.
Step 5 From Cisco Unified Communications Manager, choose Device > Phone > Find
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
“Determining the MAC Address for a Cisco Unified IP Phone” section on
page 2-20.
Step 6 Power cycle the phone.
Checking Power Connection
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.
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.

Cisco 7961G-GE - IP Phone VoIP Specifications

General

Brand	Cisco
Model	7961G-GE - IP Phone VoIP
Category	IP Phone
Language	English