I just installed a network with Cisco 12xx access points, and I am getting user complaints that their signal strength is fluctuating from very low to very high and the connection speed is also fluctuating from 54 Mbps, to 11 Mbps, to 1 Mbps and so on. I have seen this happen in other wireless installs with other access points, It has just been a while since this has happend and I can't remember what the cause or the fix was. Any Ideas?