Some existing wireless LANs, based on 802.11abg gear, are buckling under video applications. The demand increases even more with smartphones and tablets that have Web access. The iPhone 4’s FaceTime application, for video chatting over Wi-Fi, is just the most recent and most notable mobile application. Some WLANs are not set up to handle lots of mobile users and devices, says Brad Noblet, a wireless consultant. Good routing, protocol throttling, and fat backhaul are the only keys, says ExtremeLabs Managing Director Tom Henderson.”]