Brother HL-7050N - Manual (Page 134)

TCP/IP CONFIGURATION 12 - 11
YL4US_FAX2800MFC4800-FM5.5
If you do not have any subnets, use one of the following default
subnet masks:
255.255.255.0 for class C networks
255.255.0.0 for class B networks
255.0.0.0 for class A networks
The leftmost group of digits in your IP address can identify the type
of network you have. The value of this group ranges from 192
through 255 for Class C networks (e.g., 192.189.207.3), 128 through
191 for Class B networks (e.g.,128.10.1.30), and 1 through 127 for
Class A networks (e.g., 13.27.7.1).
If you have a gateway (router), enter its address with the command
SET IP ROUTER routeraddress , where routeraddress is the
desired IP address of the gateway you wish to assign to the print
server. For example:
Local> SET IP ROUTER 192.189.207.1
To verify that you have entered the IP information correctly, type
SHOW IP .
Type EXIT or CTR-D (i.e., hold down the control key and type "D")
to end the remote console session.