You didn't mention what system you have but nortel has the digital mobility solution that works way better than the T7406e. The T7406e are 800Mhz system, the digital mobility are 2.4Ghz. With the digital mobility you can add up to 8 basestations(antennas)per controller. For your setup I would recommend 2 basestations. one for the indoor and one for the outdoor. If you can mount the basestations in the middle of the area for both, the your coverage will be suffice. The digital mobility acts like a cell phone where it passes the call to the other basestation when you move around. Good Luck