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
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Check your firmware levels and update to .P447 or above.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
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:
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Open an Internet browser; e.g., Internet Explorer, Google Chrome, etc.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Type the printer’s IP address in the browser’s address field.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Click “Settings” on the left pane.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Click “Fax settings” and then “Analog Fax Setup”.
![](https://publications.lexmark.com/media/ids_assets/images/transparent.png)
Uncheck the options as shown in the image below.
Click Image to Enlarge |
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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.
LEGACY ID: SO7511