Procedure
Step 1
From Cisco Unified Communications Manager, choose Device > Phone and click Find to locate the phone
that is experiencing problems.
Step 2
Choose Delete to remove the phone from the Cisco Unified Communications Manager database.
When you remove a phone from the Cisco Unified Communications Manager database, the
configuration file is deleted from the Cisco Unified Communications Manager TFTP server. The
phone directory number or numbers remain in the Cisco Unified Communications Manager database.
They are called unassigned DNs and can be used for other devices. If unassigned DNs are not used
by other devices, delete these DNs from the Cisco Unified Communications Manager database. You
can use the Route Plan Report to view and delete unassigned reference numbers.
Note
Step 3
Add the phone back to the Cisco Unified Communications Manager database.
Step 4
Power cycle the phone.
Related Topics
Phone Addition Methods, on page 91
Identify 802.1X Authentication Problems
Procedure
Step 1
Verify that you have properly configured the required components.
Step 2
Confirm that the shared secret is configured on the phone.
•
If the shared secret is configured, verify that you have the same shared secret on the authentication
server.
•
If the shared secret is not configured on the phone, enter it, and ensure that it matches the shared secret
on the authentication server.
Verify DNS Settings
To verify DNS settings, follow these steps:
Procedure
Step 1
Press Applications.
Step 2
Select Administrator Settings > Network Setup > Ethernet Setup > IPv4 Setup > DNS Server 1.
Step 3
You should also verify that a CNAME entry was made in the DNS server for the TFTP server and for the
Cisco Unified Communications Manager system.
Cisco Unified IP Phone 8961, 9951, and 9971 Administration Guide for Cisco Unified Communications Manager 10.0
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Troubleshooting Procedures
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