I've used these in quite a few of our small buildings and they've always worked great mounted to the ceilings. The literature states it can be used ceiling or wall mounted.
We have another building where I'm going to have to mount it on the wall. I'm wondering if there's any difference in performance. Maybe this is a dumb question and I apologize if so but I didn't know if that signal is by chance stronger with it mounted one way or another, or if that signal broadcasts in every direction with the same strength?