Hi, lets figure it out. You have mounted 1522 RAPs and MAPs Outside and try to RF cover Inside the Buildings? Lets think reverse, would you ever try to Cover an Outside Area with an inside mounted AP and Omni Antenna?
What do you think about using 1522 for the Mesh and APs like 1240 in WGB Mode and Outdoor Antenna? Could be a solution, but drives Costs...
Regards, Michael