The 1042 access point states in its datasheet that it is wall or ceiling mounted. In my experience as an installation engineer I have seen that by far and away the most popular method of installation is to mount them to the ceiling. The datasheet also notes that the polarisation is "Linear, Vertical". So my question is this: Which way does the AP have to be mounted for the polarisation to be vertical, on the ceiling or on the wall. Surely it can not be the same when the AP is mounted horizontally as when it is mounted vertically.
Secondly, does mounting the AP in one or other of these methods carry any disadvantage assuming the polarisation of the wave is changed.
You can mount any ap horizontally or vertically. The biggest concern is if you still have coverage. If you had a site survey done for example and they had spec'd out the aps to be mounted on the ceiling and the installers mounted them on the wall, could this be a problem. Well it can depending on the density. A post site survey can show you if you still have coverage or not. Most of the time you want the ap to be mounted horizontal so if using external antennas, the antennas in a vertical position.