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Comparing the carbon footprints of 10G vs 100G optical


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A calculation of the expected lifetime carbon footprint of a 10G optical transport network versus a 100G network.

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Comparing the carbon footprints of 10G vs 100G optical

  1. 1. Carbon Footprint of Optical Networks – 10G vs. 100GSC11© Ciena Confidential and Proprietary
  2. 2. Carbon Footprint of Optical Networks - Comparisonof 10G vs. 100GEvaluated a representative optical network Used Internet 2 as a baseline 19 cities 10,000 miles of fiber10 year life cycle Manufacture Operations Salvage1 Tbit/sec, 3.8 Tbit/sec, and 8.8 Tbit/sec capacity Carbon Footprint Model Followed EPA carbon Footprint calculation guidelines Standard calculations for electricity, diesel fuel, and disposal Accounted manufacturing, operation, and salvage carbon footprint of all cards including spares and failures2 © Ciena Confidential and Proprietary
  3. 3. Optical Network – Carbon Foot Print Generation 15% 84% Source 1 Tbit/sec 3.8 Tbit/sec 8.8 Tbit/sec 10G 100G 10G 100G 10G 100G Cards 0.831 0.838 0.831 0.841 0.831 0.841 HVAC 0.146 0.148 0.146 0.148 0.146 0.148 Shipping 0.021 0.013 0.020 0.010 0.021 0.009 Salvage 0.002 0.001 0.002 0.001 0.002 0.0013 © Ciena Confidential and Proprietary
  4. 4. Carbon footprint reduction in optical networks4 © Ciena Confidential and Proprietary
  5. 5. Observations The reduction in carbon footprint at 100G is due to: Reduction in line cards at any given capacity Reduction of colo space required to house the equipment Reduction in HVAC required to operate the system Next generation 100G and 400G systems will continue this trend with further energy reductions Next generation switching systems with colorless and directionless photonic switching will provide architectural building blocks for further reductions.5 © Ciena Confidential and Proprietary