Cisco 7800 Series Administration Manual page 191

Procedure
Step 1
Press Applications
Step 2 Select Admin Settings > Network 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
Third-Party Call Control.
You must also ensure that DNS is configured to do reverse lookups.
Additional Troubleshooting Information
If you have additional questions about troubleshooting your phone, go to the following Cisco website and
navigate to the desired phone model:
http://www.cisco.com/cisco/web/psa/troubleshoot.html
.
Cisco IP Phone 7800 Series for Third-Party Call Control Administration Guide
Additional Troubleshooting Information
177