Tessco Wireless Journal December 2015 January 2016 Page 6 TESSCO Wireless Journal December 2015-January 2016

DECEMBER 2015 JANUARY 2016 Product information and performance claims are provided by manufacturers. 6 FEATURED SOLUTIONS (continued from page 1) Determining the right equipment and designing for total coverage is only the beginning. In the event of a disaster, the equipment must be capable of withstanding adverse conditions. This is especially important in the event of a fire, when the equipment may be inundated with water. The NFPA requires that all equipment serving a network should be housed in NEMA 4 compliant, water- and weather-proof enclosures. Testing of these enclosures is rigorous and will ensure your equipment is protected from water pressure of least 65 gallons per minute from a dis- tance of less than 10 feet. Implementing these safeguards initially will not only keep your network in line with the best practices for safety, it will prevent costly damage to your equipment. Seamless coverage is important for your public safe- ty network and the NFPA specifies minimum signal strengths that must be maintained. Within your coverage area, the minimum signal strength should be -95dB re- gardless of frequency. You will need to consider the cover- age area, signal strength, and the various frequencies that might be used when designing your network. Antenna isolation of 15dB higher than the gain of the amplifier is the generally accepted specification. Your network may require multiple antennas to meet coverage requirements, so you will need to pay close attention to isolation. A directional antenna may be the optimal solution in some locations to meet requirements for coverage, signal strength, and isolation. A comprehensive network, with well pro- tected equipment, is only useful when it has power. That's why the NFPA regulations also require systems to include battery backups and real-time monitoring alarms to alert to any failures and malfunctions. All systems should include alarms that monitor and notify of power or battery failures, antenna malfunctions, and low battery capacity is at 70 percent or less. All equipment must also be supported by a battery backup that will keep the system running from 8 to 24 hours, depending on local regulations. Additional considerations include how to centralize the monitoring point and how to ensure power coverage for requirements that could range from 120/240 volts AC to -48 volts DC. Finally, your network should be flexible so modifications can be made to address future public safety technology. Currently, a network may need to support VHF, UHF, 700 MHz, and 800 MHz based on local regulations, but with the constant advancement of wireless technology, new frequencies could be required in the near future. By look- ing ahead in your design and future-proofing your DAS, you will be ready to adapt and advance with the latest technology. A reliable network can do more than provide con- nectivity in public spaces for employees and guests. A well-designed Public Safety DAS network can protect your building and provide the peace of mind that comes with preparation. Visit www.tessco.com/go/daspublicsafety to learn more. Keep Your In-Building Network Coverage Up to Code microwave systems, delivering multi-gigabit capacity to the schools. The new broadband network offers several key advantages: Rapid Deployment The entire network, connecting 27 school districts, was deployed in 90 days. Multi-Gigabit Capacity Up to 4 Gbps capacity per site, enabling new high bandwidth learning applications Future "zero-touch" scalability with bandwidth accelerator payload compression High Reliability DragonWave's packet microwave systems can be engineered to deliver 99.999 percent availability Visit www.tessco.com/go/dragonwave. DragonWave and Horizon are registered trademarks of DragonWave Inc. Advancing Education With State-of-the-Art Broadband Network Leading with a DragonWave solution, Tek-Hut took us from a low capacity mixed media (fiber & wireless) WAN network to a high speed, wireless microwave network in less than two months, on budget and ahead of schedule. We realized bandwidth increases up to 6600 percent and an amazing cost savings of 57 percent." Ken Loftus, Director of Technology, Emmett School District CASE STUDY BACKGROUND Customer: Idaho School Districts DragonWave Partner: Tek-Hut Application: High Capacity Site Connectivity for 27 Idaho K-12 School Districts. DragonWave Products: Horizon Compact + Horizon Quantum

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