Router question - How do I ..........?

[SexyGreyFox]

I've had a Linksys router for about six years and I have four devices plugged into it.
However, by my TV I have an XBOX and a Dreambox satellite system that both use the network.
I usually unplug the ethernet cable and put it into the one I'm using.
Is it possible to plug both devices into something and then into the one cable that goes to my Linksys?

Thanks

 

[SexyGreyFox]

A switch?

http://www.overclockers.co.uk/acatalog/Switches_Hubs.html

£14.69 for the cheapest one

Ta