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HUAWEI VP9050 Executive Video Terminal
User Guide
13 Maintenance and Troubleshooting
Issue 03 (2011-12-10) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
94
Problem Possible Cause Solution
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.
Ensure that the mode of the
video output interface and the
cable that is used match each
other.
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).