9-6
Cisco Unified IP Video Phone 7985G Administration Guide
OL-8726-02
Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
If you are using DHCP, check the IP addresses that your DHCP server distributed.
Refer to
Understanding and Troubleshooting DHCP in Catalyst Switch or
Enterprise Networks
that is available at this URL:
http://www.cisco.com/warp/customer/473/100.html#41
Verifying DNS Settings
If you are using DNS to refer to the TFTP server or to Cisco Unified CallManager,
you must ensure that you have specified a DNS server. Verify this setting by
choosing
Settings >
Network Configuration
and scrolling to the
DNS Server 1
option. You should also verify that a CNAME entry exists in the DNS server for
the TFTP server and for the Cisco Unified CallManager system.
You must also ensure that DNS is configured to do reverse lookups. Windows
2000 configuration by default only performs forward lookups.
Verifying Cisco Unified CallManager Settings
On the Cisco Unified IP Video Phone, choose
Settings
>
Network
Configuration
and look at the
CallManager 1
–
5
options. The Cisco Unified IP
Video Phone attempts to open a TCP connection to all Cisco Unified CallManager
servers that are part of the assigned Cisco Unified CallManager group. If none of
these options contain IP addresses or show Active or Standby, the phone did not
properly register with Cisco Unified CallManager. See the
“Registering the Phone
with Cisco Unified CallManager” section on page 9-4
for tips on resolving this
problem.
Cisco Unified CallManager and TFTP Services Are Not Running
If the Cisco Unified CallManager or TFTP services are not running, phones may
not start up properly. However, in such a situation, you are experiencing a
systemwide failure, and other phones and devices probably cannot start up
properly.
If the Cisco Unified CallManager service is not running, all devices on the
network that rely on it to make phone calls will be affected. If the TFTP service
is not running, many devices cannot start up successfully.
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