Smallest container defined in G.709
(OTN Standard) 1.25G container size (specifically 1.244160
Gbit/s 20ppm) Established in October 2009 for transport
of 1000BASE-X (Gigabit Ethernet) Sized to fit existing OTN
hierarchy
•2 into ODU1
•8 into ODU2
•32 into ODU3
•80 into ODU4
ODU0 can carry:
•1000Base-X (1GbE)
•STM-1
•STM-4
•FC-100
No OTU0 physical layer Only a lower order wrapper for
1000BASE X mapped into standardized physical layers
