It's a security key that is used to authenticate your PC to the router.
Here is some documentation on your router: ftp://ftp.zyxel.com/P-660HW-D3/quick...660HW-D3_2.pdf
ftp://ftp.zyxel.com/P-660HW-D3/user_...3_3.40_Ed1.pdf
Have a read of the Wireless Security sections, then go to them within the config pages thru your browser. Set up a WEP or WPA key and then when you connect from the PC, you will be asked to enter the same key...connection should then follow.
































Linear Mode

