Huawei eSpace IAD - Fax and Modem Faults; Faxes Can be Received but Cannot be Sent

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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Solution
Step 1 Check whether the IP addresses configured for MG domain names are the same on the
softswitch.

If the IP addresses are the same, modify the configuration.

If the IP addresses are different, go to Step 2.
Step 2 Capture packets to check whether the signaling delivered by the softswitch is normal.

If the signaling is normal, go to Step 3.

If the signaling is abnormal, check the softswitch.
Step 3 Contact Huawei technical support engineers.
----End
2.2 Fax and Modem Faults
2.2.1 Faxes Can Be Received but Cannot Be Sent
Symptom
A fax machine connected to the IAD can receive but cannot send faxes.
Cause
The possible causes are as follows:

Poor bearer network performance

Inconsistent faxing modes

Incorrect softswitch type
Solution
Step 1 Ping the softswitch IP address to check the delay time and packet loss.

If the delay time is too long and packet loss occurs, the bearer network performance is
poor. Verify the network connection.

If the network is normal, go to Step 2.
Step 2 Check the consistency between the faxing modes of the softswitch and IAD.
Consult related personnel about the method for viewing the softswitch faxing mode.
To view the IAD faxing mode, proceed as follows:
1. Run the display protocol-mode command to view the protocol used by the IAD.
2. If MGCP is used, run the display mgcp soft-parameter command to view the faxing
mode. If the faxing mode is different from that of the softswitch, run the mgcp
soft-parameter fax-mode command to change the faxing mode. If the faxing modes are
the same, go to Step 3.