Hi .....from my own experience, the range for 5Ghz for Airties seems kinda short. Try to place the unit closer to each other ....for me i end up having 4 X Airties 4920 in order to cover my 5 room HDB.
I seem to have some trouble getting a green 5G LED on Airties when using it as a AP. Anyone having the same issue and know how to resolve it?