
Problem
Possible Cause
Solution
If the remote video is displayed
as a blue screen, the remote site
hides its video by sending a
blue screen.
Contact the administrator of the
remote site to solve this problem.
The current video output
interface is set to display the
local video.
Set the current video output
interface to display the remote
video.
The local video is not
displayed properly.
For example, the
video is in black and
white or blinks in
black and white.
The output mode of the video
output interface is set
incorrectly.
l
Ensure that the mode of the
video output interface and the
cable that is used match each
other.
l
Check whether the cable is
connected correctly or replace
the cable if necessary.
After the local site
joins a conference,
the video of a remote
site is not clear. For
example, there is
mosaic, frozen
image, or
discontinuity in the
video output.
After you perform a local video
loopback test, the video quality
is poor, which indicates that
faults exist on the local video
module.
Send the terminal to the relevant
distributor for maintenance.
When the scene captured by a
remote camera is changed, the
remote video is not clear
because the remote camera is
not set to focus automatically.
In this case, the remote camera
is set to focus on a near or far
scene.
Set the main camera of the remote
site to focus automatically.
When the conference rate is
lower than 256 kbit/s, the audio
protocol is set incorrectly. For
example, access the
Call
Statistics
screen. If the
conference rate is 256 kbit/s
and if the audio bandwidth is 64
kbit/s, the video bandwidth will
be only 196 kbit/s. Therefore,
the video quality is poor.
If the conference rate is lower than
256 kbit/s, it is recommended that
you set the audio protocol to G.728
to reduce the bandwidth used for
audio transmission.
Low video bandwidth is
available for the local site
because the network is busy.
Try to avoid initiating a conference
when the network is likely to be
busy.
Certain data is lost during
transmission, because the
quality of a network connection
device (such as an optical fiber
transceiver) is poor.
Replace the relevant network
connection device (such as the
optical fiber transceiver).
HUAWEI 9000 HD Video Terminal
Administrator Guide
11 Maintenance and Troubleshooting
Issue 09 (2012-09-03)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
164