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Improving the Energy Efficiency of Telephone Exchanges (Switching Centers)
Abstract
This chapter discusses the environmental assessment of telecommunications switching centers (telephone exchanges), based on the experience gained by Climate Associates Limited (CAL) and K8T on contracts in the UK and Ireland over the last few years. CAL has been asked to assess the energy efficiency of telephone exchanges and make recommendation on how their energy efficiency could be improved. Although we are not able to disclose details that may be commercially in confidence, this chapter draws out some general principles on the energy efficiency of telecommunications switching centers, taking into account the electricity demand of the equipment, the energy performance of the buildings housing it, the air conditioning needed to cool it, and the electrical systems used to power it, with a focus on how this could be improved. Reference is made to assessment standards such as ITU-T L.1310 Energy efficiency measurement and metrics for telecommunication network and ITU-T L.1300 Best Practices for Green Data Centers. Dr. Keith Dickerson and Dr. David Faulkner have both been active in the development of standards for environmental assessment in the European Telecommunications Standards Institute (ETSI) and the International Telecommunications Union (ITU) over the past 10 years and hold leadership positions in these bodies. Dr. Paul Kingston has an excellent track record in the modeling and assessment of power consumption to optimize design of the built environment. Acknowledgement is given to BT for permission to publish the results of this study. The results are based primarily on the study of a single telephone exchange and may not be valid for all exchanges of this type in the UK.
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