How to configure PLDT Zyxel P-600 series

I visit a good friend of mine this afternoon because he had a problem with the internet connection in his computer shop. When I got there I see that he is subscribe to PLDT MyDSL, my friend need to established a LAN in his computer shop, since the PLDT modem is capable of being a router I configure it to solve the situation.

I will share to you how I did the configuration of the PLDT Zyxel P-600 series to act as a modem/router.