How are you powering the 1200 ? Is it power injector, ? One end of power injector goes to AP while other end goes to the switch. If you are connecting a PC directly to the power injector, you will need a cross over, but if you are connecting the power injector to a switch, you need to use a straight through cable. When you connect the 1200 to the 3com switch, do you see link light on the 1200 as well as on the switch ?
Sankar Nair
UC Solutions Architect
Pacific Northwest | CDW
CCIE Collaboration #17135 Emeritus