Brother MFC-7820N - Manual (Page 148)

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Optional External Print Server (NC-2100p)
NC-2100p External Print Server
(Optional) Connecting the optional External Print Server (NC-2100p) to the
Parallel port of your MFC will allow you to print over a wired Ethernet
network.
Support for Windows ® 98/98SE/Me/2000/XP/Windows NT ® Workstation Version 4.0
Protocols TCP/IP (LPR/LPD), IPP, FTP, HTTP, TELNET, Port 9100, SMTP,
POP3, TFTP, SNMP, DHCP, BOOTP, RARP, NetBEUI