Cisco 7985G - IP Phone NTSC Video, Руководство администратора

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9-10
Cisco Unified IP Video Phone 7985G Administration Guide
OL-8726-02
Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
Verifying Voice VLAN Configuration
If the Cisco Unified IP Video Phone seems to reset during heavy network usage
(for example, following extensive web surfing on a computer that is connected to
the same switch as phone), you probably do not have a voice VLAN configured.
Isolating the phones on a separate auxiliary VLAN increases the quality of the
voice traffic. See the
“Understanding How the Cisco Unified IP Video Phone
Interacts with the Cisco Catalyst Family of Switches” section on page 2-3 for
details.
Eliminating DNS or Other Connectivity Errors
If the phone continues to reset, follow these steps to eliminate DNS or other
connectivity errors:
Step 1
Use the Erase softkey to reset phone settings to their default values. See the
“Resetting or Restoring the Cisco Unified IP Video Phone” section on page 9-13
for details.
Step 2
Modify DHCP and IP settings.
a.
Disable DHCP. See the “Network Configuration Menu” section on page 4-6
for instructions.
b.
Assign static IP values to the phone. See the “Network Configuration Menu”
section on page 4-6 for instructions. Use the same default router setting that
is used for other functioning Cisco Unified IP Phones.
c.
Assign TFTP server. See the “Network Configuration Menu” section on
page 4-6 for instructions. Use the same TFTP server that is 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.
Refer to
Configuring The IP Hosts File on a Windows 2000 CallManager Server
that is available at this URL:
http://www.cisco.com/warp/customer/788/AVVID/cm_hosts_file.html
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 DNS name.