what to use for a wireless bridge

I'm looking to set up a cme router such that some people in a warehouse environment can call each other. But, one of the phones is going on the other side of a cement block wall. So, I'm thinking put a poe switch to connect up the phone and use a wireless bridge to network the switches together. But, you guys know a lot more than i do. So, how would you do it. And, what equipment would you use? (with cheap being the main consideration)
Thanks