Airport Extreme Base Station Problem

Good morning to all! I am a newbie in here. I just want t ask some experts in here some advice and help on fxing my problem. I am on a business now. It is an internet cafe. My friend adviced me to buy this so called Airport Extreme Base Station for networking my thernet. Now I have checked myEthernet cables and all the wire sthat coud have been checked but the Airport Extreme Base Station doesn’t work at all. Is there any thing that I can do to fix this? Or is it just that Airport Extreme Base Station is a non-recommended stuff at all? Please I need your help!

Thanks!