Brother MFC-8440 B - Manual (Page 202)

13 - 4 OPTIONAL ACCESSORIES
Network (LAN) board
When you add the optional Network (LAN) Board (NC-9100h), you
can connect your MFC into the network to use the Internet FAX,
Network Scanner, Network Printer and Network Management
operations.
WARNING
DO NOT touch the surface of the main board within 15 minutes after
turning off the power.
For more details about how to configure the Network board, please
see the NC-9100h Network User's Guide on the CD-ROM supplied
with the MFC.
NC-9100h
Print/Fax Server