User's Manual

9-4
Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-23091-01
Chapter 9 Troubleshooting and Maintenance
Resolving Startup Problems
• IP Address, Subnet Mask, Default Router—If you have assigned a static IP address to the phone,
you must manually enter settings for these options. See Network Configuration Menu, page 4-5 for
instructions.
If you are using DHCP, check the IP addresses distributed by your DHCP server. See the Understanding
and Troubleshooting DHCP in Catalyst Switch or Enterprise Networks document, available at this URL:
http://www.cisco.com/warp/customer/473/100.html#41
Verifying DNS Settings
If you are using DNS to see the TFTP server or to Cisco Unified Communications Manager, you must
ensure that you have specified a DNS server. Verify this setting by pressing the Settings button on the
phone, choosing Network Configuration, and scrolling to the DNS Server 1 option. You should also
verify that there is a CNAME entry in the DNS server for the TFTP server and for the
Cisco
Unified Communications Manager system.
You must also ensure that DNS is configured to do reverse look-ups.
Verifying Cisco Unified Communications Manager Settings
On the Cisco Unified IP Phone, press the Settings button, choose Device Configuration, and look at
the Unified CM Configuration options. The Cisco
Unified IP Phone attempts to open a TCP connection
to all the Cisco
Unified Communications Manager servers that are part of the assigned
Cisco
Unified Communications Manager group. If none of these options contain IP addresses or show
Active or Standby, the phone is not properly registered with Cisco
Unified Communications Manager.
See
Checking Network Connectivity, page 9-3 for tips on resolving this problem.
Cisco CallManager and TFTP Services Are Not Running
If the Cisco CallManager or TFTP services are not running, phones may not be able to start up properly.
However, in such a situation, it is likely that you are experiencing a system-wide failure, and other
phones and devices are unable to start up properly.
If the Cisco 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 will not be able to start up
successfully.
To start a service, follow these steps:
Procedure
Step 1 From Cisco Unified Communications Manager Administration, choose Cisco Unified Serviceability
from the Navigation drop-down list and click Go.
Step 2 Choose Tools > Control Center - Feature Services.
Step 3 Choose the primary Cisco Unified Communications Manager server from the Server drop-down list.
The window displays the service names for the server that you chose, the status of the services, and a
service control panel to start or stop a service.
Step 4 If a service has stopped, click its radio button and then click the Start button.
The Service Status symbol changes from a square to an arrow.