Failure to Send and Receive Faxes When the SoftCo Is Connected to the IMS

Publication Date:  2015-07-15 Views:  181 Downloads:  0
Issue Description
Figure 3-1shows the network.

Figure 3-1 Network for receiving and sending faxes


After the SoftCo is configured, a user dials a number and hears an announcement indicating that the dialed number is incorrect.
Handling Process
Step 1 Run the show softarg command to check whether software parameter 255 is set to 0.

If software parameter 255 is not set to 0, run the config softargu type 255 value 0 command to change the value to 0.

The software parameter description is "fax and modem sdp attr mode [0:FAX/MODEM, 1:X-FAX/X-MODEM]".
  • 0: When the media is updated and the SoftCo sends the REINVITE message, the fax parameter is FAX/MODEM.
  • 1: When the media is updated and the SoftCo sends the REINVITE message, the fax parameter is X-FAX/X-MODEM.
When the SoftCo is connected to the IMS, the FAX/MODEM parameter is used.

Step 2 If the fault persists, contact Huawei technical support engineers.

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Root Cause
The possible causes are as follows:
  • The signaling interaction is abnormal.
  • The fax mode is incorrect.

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