ASHRAE Journal - January 2009 - (Page 36) Load Strategies By David Quirk, P Member ASHRAE; and Magnus K. Herrlin, Ph.D., Member ASHRAE .E., For Telecom Switching Centers M ore electronic equipment of the type historically found only in data centers is finding its way into telecom switching centers. This trend is driven largely by the need to increase speed-to-market for new applications and services driven by customers’ thirst for more data services and greater transfer speeds. The result is a shift in technology from switching to IP-based protocols and standardization of hardware platforms most commonly found in data centers. Generally, this equipment has high or very high heat dissipation compared to traditional network gear. This migration may lead to complications in terms of physical network reliability. Cooling design of network rooms differs significantly from data center design. For example, overhead air delivery is dominant (no raised floor) and equipment facing the same direction 36 ASHRAE Journal efit from understanding telecom-specific requirements and the principal telecom standards. Managing the dense, diverse, and evolving network environments is a challenge. The telecom industry must understand cooling options so that new high-density equipment can coexist with legacy gear. Traditionally, Telcordia Technologies provided the leadership and guidance for telecom applications. Its “GR-3028-CORE, Thermal Management in Telecom Central Offices”2 outlines a About the Authors David Quirk, P is a senior engineer at Verizon .E., Wireless in Basking Ridge, N.J. He is a corresponding member of ASHRAE Technical Committee (TC) 9.9, Mission Critical Facilities, Technology Spaces, and Electronic Equipment, and past president of ASHRAE’s Akron chapter. Magnus K. Herrlin, Ph.D., is president of ANCIS Incorporated in San Francisco. He is vice chair of TC 9.9. is not uncommon. What is applicable to data centers is not necessarily applicable to telecom switching centers. When dealing with telecom facilities, those familiar only with data centers and books such as ASHRAE’s Thermal Guidelines fo r Data Processing Environments1 can benashrae.org January 2009 http://www.ashrae.org
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