Many Brother printers include wired and wireless network adapters. The wireless adapter should be disabled to prevent interference with the district wireless network.
Brother printers will broadcast a wireless network with an SSID of SETUP.
On brother printers without a display such as the HL-2170w and HL-2270w, you can disable wireless by holding the Go button for approximately 10 seconds. Release the button once a page begins to print. That page will note that the wireless adapter is now inactive.