Brother MFC-8870DW - Manual (Page 47)

Wireless configuration for Windows ®
33
4
10
If you choose This PC has wireless capability.,
check I am using an access point in
infrastructure mode., and then click Next. Go to
step 11.
If you are using a wired computer, choose This PC
uses a newtwork cable to connect the wireless
network., you must configure the wireless settings
from the control panel. Click Next and follow the
on-screen instructions to complete the setup. See
Using the Setup Wizard from the control panel on
page 20.