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DAS System Architectures
 Outdoor radio frequencies like cell phone transmissions are blocked by building materials. To propagate strong wireless signals within a building requries a repeater or Distributed Antenna System (DAS). Repeaters are effective for a single WSP (wireless service provider) and DAS effectively provides wireless coverage for all signals: cell phones, public safety and two-way radios plus wireless LAN devices in buildings, tunnels, and subterranean areas. Depending on the particular application, one type of wireless network infrastructure may be more effective than another. Architectures are designed with various cable types. Coaxial cable is a basic cable used in small single carrier deployments and combined with Fiber optic cable for larger complex systems. Radiating Cable is almost always used in tunnels and elevator shafts. CAT5 cable is generally used for single carrier systems on mid size projects and Fiber Optic cable is mostly used on large scale projects. Wireless Lan or WLAN can be integrated into a Fiber Optic system efficiently using one backbone for all signals, thus reducing management and maintenance costs. |
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