Huawei RP100-55T User Manual page 88

HUAWEI RP100-55T Room Presence
User Guide
Problem
The local video is
not displayed
properly. For
example, the video
is in black and white
or blinks in black
and white.
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.
Issue 01 (2013-12-20)
Possible Cause
The current video output
interface is set to display the
local video.
The output mode of the video
output interface is set
incorrectly.
After you perform a local
video loopback test, the video
quality is poor, which
indicates that faults exist on
the local video module.
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.
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.
Low video bandwidth is
available for the local site
because the network is busy.
Certain data is lost during
transmission, because the
quality of a network
connection device (such as an
optical fiber transceiver) is
poor.
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12 Maintenance and Troubleshooting
Solution
Set the current video output
interface to display the remote
video.
 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.
Send the RP100-55T to the
relevant distributor for
maintenance.
Set the main camera of the remote
site to focus automatically.
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.
Try to avoid initiating a
conference when the network is
likely to be busy.
Replace the relevant network
connection device (such as the
optical fiber transceiver).
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