Figure 6-3 shows the troubleshooting flowchart.
Figure 6-3 Call quality is low
Rectify line fault
The call quality
is low
Is there any
QoS alarm?
Is echo
suppression
enabled?
Yes
No
End
Is fault
rectified?
No
Disable echo
suppression
Yes
No
Is fault
rectified?
No
Seek technical
support
Yes
Yes
Is there
interference?
Remove
interference
No
Is fault
rectified?
Yes
No
Yes
Yes
Rectify network
fault
No
Is fault
rectified?
Yes
No
Is
there noise
or unidirectional
communication?
Troubleshooting Procedure
NOTE
Saving the results of each troubleshooting step is recommended. If troubleshooting fails to correct the fault,
you will have a record of your actions to provide Huawei technical support personnel.
Procedure
Step 1 Check whether there is any QoS alarm record.
View historical alarm records on the AR2200-S to check whether there is any QoS alarm record.
l If there are QoS alarm records, rectify network faults according to instructions in the alarms.
l If there is no QoS alarm record, go to step 2.
Step 2 Check whether the echo suppression function is enabled on the softswitch.
l If the echo suppression is enabled, disable it.
l If the echo suppression is disabled, go to step 3.
Huawei AR2200-S Series Enterprise Routers
Troubleshooting 6 Voice
Issue 01 (2012-01-06) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
144
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