802.11 MAC Point Coordination Function

Hi All, I'm doing some research on 802.11 quality of service, congestion control, etc. I'm trying to find some information on the Point Coordination Function, a polling based access control method, but I'm having a hard time finding much in the way of vendor support. I have access to some cisco 1242's, 1140's and 1252's and I've been searching the Cisco's site and can't find a real answer on whether or not it's supported let alone how to configure it. Does anyone have any experience with this? Does Cisco have some special name for it aside from PCF? Any help would be appreciated! Thanks, Jeremy