This is a quick video on how to mount a Cisco wireless access point to a drop ceiling. The AP in the video is a Cisco 2802i, but the same mounting hardware can be used for many different models such as:
2702, 3702, 3802, 9120, 9130, 9162, 9164, 9166.
The mount I used is the standard mount that's included in the box with APs: AIR-AP-BRACKET-1=
