One of my accounts is a school in which I take care of the fire alarm system. They have asked me to see if it would be possible for me to come up with some type of system whereby they might be able to improve their spotty cell phone reception throughout the building. The maintenance supervisor has heard of a type of "repeater" (if that is the correct term) that can be employed to accomplish this but truthfully at this point he seems to know more about it than I do. Would this be some type of diversity transceiver with multiple antennas throughout the building? This seems like it could be a fairly lucrative thing for me if I can find out enough about doing it. Can someone more familiar with this please enlighten me as to theory, structure of and design of the system, and equipment suppliers in the US? The structure which concerns me is block wall inside, (class rooms) and out. Thanks for any assistance. Lenny