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Lexmark MX611

Lexmark MX611

Recurring E-904 Error When Sending Fax Via Fax Over IP (FoIP)

What you will see

A repeating E-904 error appears in the fax job logs when you try to send a fax using Fax over IP (FoIP). FoIP allows faxes to be sent and received via the network card without the need for a fax modem (card), utilizing the t.38 protocol. For more information and the configuration for this solutions software, you may refer to the Fax over IP Admin Guide.

Suggested Remedy

Please contact Lexmark Technical Support to acquire the firmware that will fix the issue.


The Lexmark representative might ask for the printer's current firmware level. Please refer to this link xref_Check_xref for the steps. Once you obtain the file, you may proceed and update the firmware by following the steps from this link Badge Reader Does Not Work when Printer Is in Standby and Sleep Mode.

Still need help?

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When calling for support, you will be asked for your machine/model type and serial number (SN).

Please be near the products described in this article to expedite the support process and reduce callbacks.


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