EMG2926 as a wireless repeater for ASUS router

Hello 

Is it possible to use the EMG2926 as a repeater for an ASUS router ? Based on the manual it seems the main router needs to also be a Zyxel EMG2926 in "Root AP mode". Or can it be any other brand? 

My situation is I want to connect a PC with an ethernet cable to the EMG2926 which would connect wirelessly as a repeater to my main router (ASUS), giving my wired PC access to the Internet and to my Wifi LAN.