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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
89
Figure 13-4 Diagnostic model of the terminal
Figure 13-4 shows the diagnostics of three modules, including the audio module, video
module, and network send/receive module.
Normal audio signal streams are as follows:
Local microphone → 1 → 5 → communication network → 6 → 7 → remote speaker
Local speaker ← 2 ← 5 ← communication network ← 6 ← 8 ← remote microphone
Normal video signal streams are as follows:
Local camera → 3 → 5 → communication network → 6 → 9 → remote display
Local display ← 4 ← 5 ← communication network ← 6 ← 10 ← remote camera
Sound and Color Bar Tests
Table 13-3 describes sound and color bar tests.
Table 13-3 Sound and color bar tests
Test Item to Be Tested/Objective Signal Stream
Sound test 2 audio output 2 → speaker
Color bar test 4 video output 4 → display
To perform a sound test, choose Diagnostics > Sound & Color Bar Test > Sound Test.
The terminal plays an embedded tone to test the audio output quality.
To perform a color bar test, and then choose Diagnostics > Sound & Color Bar Test >
Color Bar Test. The terminal displays 6 color bars on the display to test the color output
quality.
Loopback Tests
The terminal can transmit audio or video data on a channel to simulate the actual application
and test whether the output is satisfactory. You can perform a local loopback test to check the
local network connection or a remote loopback test to check the remote network connection.