Summary

Amendment 1 to Recommendation ITU-T G.989.1 (2013) provides additional information on protection and/or restoration in NG-PON2 networks using flexible wavelength scheduling, which is not covered in clause 9.4, as well as other new requirements of the ITU-T G.989-series systems not captured in ITU-T G.989.1 (2013).

Requirements identified for inclusion in this amendment are:

−           Network protection in the case of a multi-wavelength access system. In particular, the possibility of ODN topologies that appear to be type B (shared splitter), but that provide additional capabilities. Also, the potential for 1:n protection in addition to the 1:1 protection previously described.

−           Transport of wireless fronthaul links over the access system. Such links have exceptional service requirements and these are evolving as the application develops in the industry.