DAS and SmallCell Solutions
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Alpha Technologies Powers NYC Subway DAS With over 277 underground stations and an annual ridership exceeding more than one billion, the New York City subway system is the largest and most established of its kind in North America. In 2011, an ambitious plan was developed by Transit Wireless and the Metropolitan Transportation Authority (MTA) to use DAS as a means of blanketing all 277 underground subway stations with mobile voice and data coverage for commuters, emergency and security services. Given the critical nature of this application and the harsh, variable subterranean environment, Alpha was brought in to design a customized power solution that could withstand extremes of temperature, moisture, vibration and shock, while meeting all the operational load requirements such as battery backup time in the event of a grid failure. Alpha’s solution came packaged as a ceiling mounted cabinet (able to support 250lbs of gear, with an Ingress Protection rating of 66), FXM 2000 outdoor rated UPS module and AlphaCell 85GXL batteries. Expected to be completed by 2016, the network will host services provided by the four biggest wireless carriers, AT&T, Sprint, T-Mobile & Verizon and others. –––––––––––––––––––––––––––––––––––––––– See our other case studies at www.alpha.ca/case-studies Major wireless carriers and DAS integrators in the US and Canada are using Alpha’s power systems to backup their IDAS and ODAS nodes, e.g. IDAS - PNC Park, Pittsburgh IDAS - Century Link Field, Seattle IDAS & ODAS - PPL Park, Philadelphia IDAS - Husky Stadium, Seattle ODAS - NYC Subway, New York City IDAS - Safeco Field, Seattle ODAS - Chicago Transit Authority, Chicago IDAS - JW Marriott, Palm Springs IDAS - Houston Subway, Houston IDAS - Coliseum, Los Angeles IDAS - Sports Authority Field at Mile High, Denver IDAS - MGM Grand, Las Vegas IDAS - Bankers Life Field House, Indianapolis IDAS - Venetian, Las Vegas IDAS – Texas A&M University, College Station ODAS - University of Cal Football Stadium ODAS - Oakland Bay Bridge, San Francisco ODAS - City of Palo Alto The National Electrical Code defines a Class 2 circuit as that portion of the wiring system between the load side of a Class 2 power source and the connected equipment, such as the IDAS remote device. The Class 2 power source is limited to 100 Watts of output power per circuit and cannot exceed 60Vdc. Due to its power limitations, a Class 2 circuit is considered safe from a fire initiation standpoint and provides acceptable protection from electrical shock. Because it is deemed low risk, a Class 2 circuit can be installed by DAS technicians over conventional surface-mounted cable. In order to meet the 100W restriction, the power equipment must employ some form of active current limiting circuitry. Without the 100W guarantee, remotely powering the distant devices requires that the cable be armored or enclosed in conduit, and that the site be certified by a licensed electrician. Since the latter approach is so costly, most DAS providers have looked to use line power equipment like Alpha’s eLimiter+ to meet the NEC requirements. Though products like eLimiter+ have significantly reduced the cost of IDAS installations, there persists a common misconception that low cost, conventional fuse panels can meet Class 2 provided they are fused appropriately. This belief is incorrect because the power distribution device must meet the 100W requirement even when the primary protection device (i.e., the fuse) is bypassed. The end result is that conventional fuse panels are not compliant with NEC Class 2, though they may be used if the provider elects to incur the expense of conduit and a licensed electrician. Contact our Power Experts and find out why: The Alpha Group Alpha Technologies Ltd is a proud member of The Alpha Group - an alliance of independent companies who share a common philosophy – to create world class powering solutions. Collectively, Alpha Group members develop and manufacture AC, DC and renewable power conversion, protection and standby products, featured in millions of operational installations around the world today. Copyright © 2015 Alpha Technologies. All Rights Reserved. Alpha® is a registered trademark of Alpha Technologies. member of The Alpha Group™ is a trademark of Alpha Technologies.Cordex™ is a trademark of Alpha Technologies Ltd. Alpha Powers

Enclosures Aggregator Alpha is the leader in powering wireless networks. Our application knowledge, coupled with expertise in DC, AC, Line Power and enclosures, enable Alpha to deliver high reliability solutions for Macro Cell, DAS and Small Cell networks. We pioneered the powering of indoor DAS remotes using copper cable, dramatically lowering the cost and improving the reliability of these networks. For outdoor DAS, we are the industry leader in powering remotes with our line of rugged UPS systems. Now, we are the first to develop AC, DC and Line Power solutions for Small Cell networks....

Enclosures Aggregator Alpha is the leader in powering wireless networks. Our application knowledge, coupled with expertise in DC, AC, Line Power and enclosures, enable Alpha to deliver high reliability solutions for Macro Cell, DAS and Small Cell networks. We pioneered the powering of indoor DAS remotes using copper cable, dramatically lowering the cost and improving the reliability of these networks. For outdoor DAS, we are the industry leader in powering remotes with our line of rugged UPS systems. Now, we are the first to develop AC, DC and Line Power solutions for Small Cell networks....

Alpha Technologies Powers NYC Subway DAS With over 277 underground stations and an annual ridership exceeding more than one billion, the New York City subway system is the largest and most established of its kind in North America. In 2011, an ambitious plan was developed by Transit Wireless and the Metropolitan Transportation Authority (MTA) to use DAS as a means of blanketing all 277 underground subway stations with mobile voice and data coverage for commuters, emergency and security services. Given the critical nature of this application and the harsh, variable subterranean environment,...