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Fax Calls Are Failing and the Printer Posts an E724 or E970 Error Code

Document ID:SO7511

Usergroup :External
04/23/14 Properties  


Fax send fails; Unable to send fax;


This document is applicable to the following Lexmark Multifunction printer (MFP) models: MX310, MX410, MX510, MX61x, MX71x, MX81x, CX310, CX410, & CX510.


What you will see 

Sending a fax fails and you see an .E724 or .E970 error displayed on the printer or transmission log. Also, after rebooting the device, the device may work properly for a period of time before reverting back to this behavior.


Possible cause

It is possible that the devices are on a shared line.


Recommended actions

  1. Check your firmware levels and update to .P447 or above.
  2. If you cannot update firmware, you can deselect or disable these settings:
  • Enable Line Connected Detection
  • Enable Line In Wrong Jack Detection
  • Enable Extension In Use Support

You can change these settings using the printer’s Operator Panel Menu or by accessing the printer’s Embedded Web Server (EWS).

EWS example:

  1. Open an Internet browser; e.g., Internet Explorer, Google Chrome, etc.
  2. Type the printer’s IP address in the browser’s address field.
  3. Click “Settings” on the left pane.
  4. Click “Fax settings” and then “Analog Fax Setup”.
  5. Uncheck the options as shown in the image below.
Click Image to Enlarge
Make sure the options boxed in red are all unchecked.

IMPORTANT! Power cycle (restart) the device to reset the modem and the current line status.


Still need help?

Please contact Lexmark Technical Support if you need additional assistance. NOTE: When calling for support, you will be asked for your machine/model type and serial number (SN).

Please call from near the printer in case the technician on the phone asks you to perform a task involving the printer.


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