Is it supported? No, that was an "experimental" feature on C series (which EX's were based on) as long as you're running TC7x code. If so, go into the web GUI, go to configuration and search for "BYOD" (short for Bring your own device), and turn it on. Not supported, but it should work, you just can't have too many people connected to it (three if memory serves).
Hope this helps.
