Brother MFC-5440CN - Manual (Page 165)

A - 9 APPENDIX A
Connecting an external device to your
MFC
Connecting an external telephone
You can connect a separate telephone (or telephone answering
device) directly to your MFC as shown in the diagram below.
Connect the telephone line cord to the jack labeled EXT. in the back
of the MFC.
When you are using an external or extension telephone, the LCD
shows
Telephone .
Extension
Telephone
External
Telephone