It's capable but does it have a wireless card fitted? You definitely need one in order to connect to your router. Please don't get confused with infra red as this will not connect to your router as it's a an entirely different thing and pretty much obsolete. You will need to read the router manual so you can set up your connection.  Try this first and see if it helps. Getting Started and Connecting to a Wireless Network: [URL] see how you get on 
Dell told me my Inspiron 8200 was wireless capable. I have not been able to connect with my Broadband wireless router. I enabled the Infrared Port but it still doesn't connect. I am not tech literate so I don't even know if the infrared port is for this purpose. Can anyone help me, please.
Inspiron 8200 infrared port