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Lexmark MC2425

Lexmark MC2425

'Analog Fax Not Detected. Please Contact System Administrator' Error Still Appears After Disabling the Fax Function for Lexmark 2016 Products

Affected Products:

Single-Function: CS720, CS725, CS727, CS728, C4150, CS820, CS827 and C6160

Multifunction: CX725, CX727, XC4140, XC4143, XC4150, XC4153, CX820, CX825, CX827, CX860, XC6152, XC6153, XC8155, XC8160 and XC8163


MarkVision Enterprise (MVE)

Issue Description:

When you disable the Fax option in function access controls (FAC) from the control panel, the message “Analog Fax not detected. Please contact system administrator" still appears.


The 2016 Lexmark products no longer support the option for disabling Fax under Function Access Control (FAC).

FAC can only limit the access to the fax job icon and panel settings.

A new "disable fax" option will be available in firmware version 4.0 (FW4).

Suggested Fix:

A temporary fix is provided in which you access printer’s menu and go to Settings > Fax > Analog Fax Setup. Enter a fax station name and any number, and then uncheck the following.

  • Enable Line Connected Detection

  • Enable Line In Wrong Jack Detection

  • Enable Extension In Use Support

Still Need Help?

Have the following available when calling Lexmark Technical Support;

  • Printer model(s)

  • Printer serial number


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