Fax And Modem Faults; Faxes Can Be Received But Cannot Be Sent - Huawei eSpace IAD Troubleshooting Manual

eSpace IAD
Troubleshooting
Solution
Step 1 Check whether the IP addresses configured for MG domain names are the same on the
softswitch.
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Step 2 Capture packets to check whether the signaling delivered by the softswitch is normal.
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Step 3 Contact Huawei technical support engineers.
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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:
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Solution
Step 1 Ping the softswitch IP address to check the delay time and packet loss.
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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.
2.
Issue 02 (2012-02-29)
If the IP addresses are the same, modify the configuration.
If the IP addresses are different, go to
If the signaling is normal, go to
If the signaling is abnormal, check the softswitch.
Poor bearer network performance
Inconsistent faxing modes
Incorrect softswitch type
If the delay time is too long and packet loss occurs, the bearer network performance is
poor. V erify the network connection.
If the network is normal, go to
Run the display protocol-mode command to view the protocol used by the IAD.
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.
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Step 3.
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2 Analy zing and Rectify ing Faults
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