Summary

Amendment 3 to Recommendation ITU-T G.709/Y.1331 contains extensions to the second version (03/2003) of this Recommendation. It specifies 100 Gbit/s ODU4/OTU4, support of gigabit Ethernet services via ODU0, ODU2e, ODU3 and ODU4, multi-lane OTU3 and OTU4 and the Lower Order and Higher Order ODU concept to align with the "one-stage multiplexing" specification described in clause 9.2 of Recommendation ITU-T G.872.