eSpace IAD
Troubleshooting
2 Analyzing and Rectifying Faults
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
2.2.5 How to transfer remote faxes
Symptom
Faxes failed to be transferred.
Possible Cause
The V21 timer is incorrectly set.
Solution
Step 1 Check the setting of the V21 timer.
For the IAD208E(M) and IAD132E(T), choose Advanced Configuration > User Port
Attribute, or run the display pstnport attribute command to check the setting of the
V21 timer. Generally, the value is set to 10 seconds. If the IAD can detect the signals
sent from the timer in 10 seconds, the fax process starts. If the IAD fails to detect signals
in 10 seconds, the modem service process starts.
For the IAD1224, choose Advanced Configuration > Setting the Fax Parameters, or
run the display dsp fax-tone command to check the setting of the V21 timer. Generally,
the value is set to 500 (10 ms), that is, 5 seconds. If the IAD receives signals sent from
the timer within 5 seconds, the fax process starts. If the IAD fails to detect signals in 5
seconds, the modem service starts.
Step 2 If the configuration is incorrect, adjust the setting as follows:
For the IAD208E(M) and IAD132E(T), choose Advanced Configuration > User Port
Attribute and adjust the V21 timer setting on the displayed page, or run the pstnport
attribute set command to adjust the setting.
For the IAD1224, choose Advanced Configuration > Setting the Fax Parameters and
adjust the V21 timer setting on the displayed page, or run the dsp fax-tone set command
to check the setting.
Step 3 Check whether the fault is rectified.
If yes, the procedure ends.
If yes, go to Step 4.
Step 4 Contact Huawei technical support engineers.
----End
2.2.6 Modem Dialing Failure
Symptom
Users on the IAD fail to dial up to the network (or dial the opposite modem).
Cause
The service configuration of the softswitch is incorrect.
The duration of the V21 timer on the IAD is too long. (The current default value is 10
ms.)
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