Samsung SL-M2020W-XAA - Manual (Page 103)

Wireless network setup
103 2. Using a Network-connected Machine
4 Select Wireless network connection on the Printer Connection Type
screen. Then, click Next.
5 On the Are you setting up your printer for the first time? screen, select
Yes, I will set up my printer's wireless network. Then, click Next.
If your printer is already connected on the network, select No, my
printer is already connected tomy network.
6 Select Using a direct wireless connection on the Select the Wireless
Setup Method screen. Then, click Next.
Even if your computer is running Windows 7 or higher, you cannot use this
feature if your PC does not support wireless network. Set the wireless
network using a USB cable (see "Access point via USB cable" on page 99).