I believe that if you map out the radiation pattern of the radio signal you'll see that if the AP is too close to a reflective surface, the radio wave isn't orthogonal enough to get through the glass. So if you move it away [depending on the power of the antennas and signal], it gives the singal enough room and time to straighten out orthogonally and not reflect off the glass surface.
But that's my experience.. -- Robi -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
