larger areas and can handle more users (about 100). Pico cells are used in smaller sites such as homes with fewer users than femtocells (five or six users). Both technologies provide relatively low-cost ways to add coverage inside buildings and outdoors. Building owners rely on carriers to provide pico and femtocells because only carriers have rights to spectrum used for mobile services. Femtocells can cover about 5,000 square feet and pico cells about 2,000 square feet. Like traditional base stations, pico cells support multiple standards LTE and 5G networks as well as multiple frequencies. New buildings that require coverage often use Wi-Fi rather than pico or femtocells within office buildings. The Wi-Fi service is connected to the LAN, which links Wi-Fi traffic to the external broadband network. This eliminates the need to coordinate installation with a mobile carrier to access their spectrum. Staff with cell phones can now enable voice over Wi-Fi to use their smartphones for voice calls as well as data. Mobile providers and tower companies install pico cells that are used for outdoor coverage. They can be attached to telephone poles, thin poles, and multistory buildings in densely populated areas with high concentrations of mobile traffic. This solution is an inexpensive way to gain capacity by reusing a carrier's spectrum within a smaller area than that covered by larger macrocells. A macrocell site is a cell site with a larger antenna and a controller that covers a larger area and can handle more traffic. Pico cells require local electricity and connections back to the mobile carrier's equipment. Femtocells and Pico Cell Gateways www.TechnicalPDF.com Femtocell traffic within buildings is routed within secure, encrypted software tunnels over a customer's broadband connections to a carrier's data center. At the data center, femtocell traffic is routed to a gateway. The gateway removes the surrounding bits in the tunnel and sends the femtocell traffic to the carrier's core network. The gateway transmits traff