As a complement to our tower and rooftop solutions, SBA has collaborated with ExteNet Systems to provide cost effective, multi-carrier Distributed Antenna System (DAS) solutions for improved coverage and capacity in hard-to-zone and environmentally sensitive areas, typically through the use of shared fiber-based infrastructure. ExteNet Systems also offers unique solutions for in-building applications, both proprietary single carrier solutions as well as multi-tenant solutions - in both private and public venues. For more information on DAS solutions through our partner ExteNet Systems, please go to http://www.extenetsystems.com.