Cisco 7965G Administration Manual page 182

General Troubleshooting Tips
Table 9-2
Summary
Cisco VT
Advantage/Unified
Video Advantage
(CVTA)
Phone call cannot be
established
Call established with the
iLBC protocol does not
show that the iLBC codec
is being used
Cisco Unified IP Phone 7965G and 7945G Administration Guide for Cisco Unified Communications Manager 6.0
9-14
Cisco Unified IP Phone Troubleshooting (continued)
Explanation
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
more information.
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:
The Ethernet cable is attached.
1.
The Cisco CallManager service is running on
2.
the Cisco Unified Communications Manager
server.
Both phones are registered to the same Cisco
3.
Unified Communications Manager.
Audio server debug and capture logs are enabled
4.
for both phones. If needed, enable Java debug.
Call statistics display does not show iLBC as the
receiver/sender codec.
Check the following using the Cisco Unified
1.
Communications Manager administration
pages:
– 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.
Enable audio server debug and capture logs from
3.
both phones. If needed, enable Java debug.
Chapter 9 Troubleshooting and Maintenance
for
OL-12650-01