Huawei eSpace IAD - 2.2 Fax and Modem Faults

eSpace IAD
Troubleshooting
2 Analyzing and Rectifying Faults
Issue 02 (2012-02-29)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Step 5 Check whether the IP address in the connection information attribute in the INVITE
message sent by the IAD is the IP address of the local device. The peer device sends the RTP
stream to the IP address in this attribute.

If no, IAD users cannot hear the voice from the peer device.

If yes, go to Step 6.
Step 6 Capture IAD packets to check whether the peer device has sent RTP packets to the local
device.

If yes, go to Step 7.

If no, the local device cannot hear the voice from the peer device. Check the peer device.
Step 7 Contact Huawei technical support.
----End
2.1.22 No Voice
Symptom
The calling parties cannot hear each other.
Cause
The possible causes are as follows:

Network quality issue

Opposite gateway issue

Inconsistence of codec between gateways

IAD device issue
Solution
1. Check the status of the network that connects the IAD with the opposite gateway (IAD
or trunk gateway) first. Firewalls or NATs between devices may cause the two-way data
blocking. You can run the pinga.b.c.d command to check the network status.
2. When the IAD cooperates with some of the softswitches, no-voice faults may occur
because the codecs supported by the gateways are inconsistent. You can run the trace
command to trace signaling to determine the fault.
3. Run the display rtp state command to query the RTP statistics.
4. Check whether the fault is rectified.
− If yes, the procedure ends.
− If no, go to 5.
5. Contact Huawei technical support.