How do I set up a wireless connection on the DCP-B7520DW?
Press the WiFi button on the control panel and launch the wireless installer on your computer. Follow the on-screen instructions to set up a wireless connection between your machine and your network. If you cannot connect to the wireless network, refer to the Online User's Guide for instructions on printing the WLAN Report, or see the Quick Setup Guide for alternative wireless setup. (Page 9)
From the official Brother DCP Series B7520DW All-in-One Printer manual, page 9
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