124D-Link DIR-868L User Manual
Section 5 - Security
You will then be prompted to enter the network security key (Wi-Fi password) 
for the wireless network. Enter the password into the box and click Next. 
If you wish to use Wi-Fi Protected Setup (WPS) to connect to the router, you can 
also press the WPS button on your router at the point to enable the WPS function. 
When you have established a successful connection  a  wireless  network, the 
word Connected will appear next to the name of the network to which you are 
connected.