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   Recommendation ITU-T G.9806
  describes a higher speed bidirectional single fibre point-to-point optical
  access system than the data rate in existing ITU-T point-to-point access
  systems. It supports 10 Gbit/s and above for the optical access services
  including the optical distribution network (ODN) specification, the physical
  layer specification, services requirements and the operation, administration
  and maintenance (OAM) specification. 
  Amendment 1 adds support for 25 Gbit/s. 
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