Cisco 7902G - Unified IP Phone VoIP, Administration Manual

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Chapter 7 Troubleshooting the Cisco Unified IP Phone
Cisco Unified IP Phone Resets Unexpectedly
7-10
Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SCCP), Cisco Unified IP Phones
OL-8151-01
Isolating the phones on a separate auxiliary VLAN increases the quality of the
voice traffic. See the
“Understanding How the Cisco Unified IP Phone Interacts
with the Cisco Catalyst Family of Switches” section on page 2-3 for details.
Verifying that the Phones Have Not Been Intentionally Reset
If you are not the only administrator with access to Cisco Unified CallManager,
you should verify that no one else has intentionally reset the phones.
Eliminating DNS or Other Connectivity Errors
If the phone continues to reset, follow these steps to eliminate DNS or other
connectivity errors:
Procedure
Step 1
Reset the phone to factory defaults. See the “Resetting the
Cisco Unified IP Phone” section on page 7-15 for details.
Step 2 Modify DHCP and IP settings:
a.
Disable DHCP. See the “Modifying DHCP Settings” section on page 4-15 for
details.
b.
Assign static IP values to the phone. See the “Configuring IP Settings”
section on page 4-20 for details. Use the same default router setting used for
other functioning Cisco Unified IP Phones.
c.
Assign a TFTP server. See the “Configuring TFTP Options” section on
page 4-31 for details. Use the same TFTP server used for other functioning
Cisco Unified IP Phones.
Step 3
On the Cisco Unified CallManager server, verify that the local host files have the
correct Cisco Unified CallManager server name mapped to the correct IP address.
Step 4
From Cisco Unified CallManager, choose System > Server and verify that the
server is referred to by its IP address and not by its host name.