Cisco 7962G - Page 190

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Cisco Unified IP Phone Administration Guide for Cisco Unified Communications Manager 7.1
OL-18913-01
Chapter 9 Troubleshooting and Maintenance
General Troubleshooting Tips
Peer Firmware Sharing fails. If the Peer Firmware Sharing fails, the phone will default to using the TFTP
server to download firmware. Access the log messages stored on the remote
logging machine to help debug the Peer Firmware Sharing feature.
Note These log messages are different than the log messages sent to the
phone log.
Cisco VT Advantage/Unified Video
Advantage (CVTA)
If you are having problems getting CVTA to work, make sure that the PC Port
is enabled, and that CDP is enabled on the PC port.
See Network Configuration Menu, page 4-5 for more information.
Phone call cannot be established The phone does not have a DHCP IP address, is unable to register to Cisco
Unified Communications Manager, and shows a Configuring IP or Registering
message.
Verify the following:
1. The Ethernet cable is attached.
2. The Cisco CallManager service is running on the Cisco Unified
Communications Manager server.
3. Both phones are registered to the same Cisco Unified Communications
Manager.
4. Audio server debug and capture logs are enabled for both phones. If
needed, enable Java debug.
Call established with the iLBC protocol
does not show that the iLBC codec is
being used
Call statistics display does not show iLBC as the receiver/sender codec.
1. Check the following by using Cisco Unified Communications Manager
Administration:
– Both phones are in the iLBC device pool.
– The iLBC device pool is configured with the iLBC region.
– The iLBC region is configured with the iLBC codec.
2. Capture a sniffer trace between the phone and Cisco Unified
Communications Manager and verify that SCCP messages,
OpenReceiveChannel, and StationMediaTransmit messages have media
payload type value equal to 86. If so, the problem is with the phone;
otherwise, the problem is with the Cisco Unified Communications
Manager configuration.
3. Enable audio server debug and capture logs from both phones. If needed,
enable Java debug.
Table 9-2 Cisco Unified IP Phone Troubleshooting (continued)
Summary Explanation