Internet "Bridges"

I'm putting an office a few floors up from my phone hook up, and there are twisting stairs which cause my wireless hook up to operate VERY slowly. I've heard of something called bridges, that basically go in between my wireless output device and the reciever, and re lay the message, keeping it strong. How exactly does this work, and where would be the best place to purchase a good "bridge."

(This may not even be the proper name for the device I need. I've got no clue how to do this.)

Hey, you should also investigate <a href="http://www.webopedia.com/TERM/r/repeater.html">repeaters</a>. We just talked about them in A2 computing, sounds like what you need, but I wouldn't know the details of your network, just one more thing for you to have to read about!

As for where... depends where you are in the world. I like <a href="http://www.dabs.com">Dabs</a> in the UK.

Hope this helps!