Result: standard mapping
How many ODU1s are in an OTU2?
An OTU2 carries 4 ODU1s, per ITU-T G.709.
4
ODU1s in an OTU2
Working
OTU2 → 1 × ODU2 → 4 × ODU1
- 1 × ODU2 in each OTU2 ITU-T G.709The OTU2 frame carries exactly one ODU2.
- 4 × ODU1 in each ODU2 ITU-T G.709Four ODU1s. Each ODU1 takes two of the eight 1.25 Gbit/s tributary slots.
- 1 ODU2
- 1 × 4 = 4 ODU1s
Leftover capacity
714.124812 Mbit/s of each OTU2 line rate (10.709225316 Gbit/s) sits outside 4 × 2.498775126 Gbit/s of ODU1 line rate (9.995100504 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.