Result: standard mapping
How many ODU0s are in an OTU1?
An OTU1 carries 2 ODU0s, per ITU-T G.709.
2
ODU0s in an OTU1
Working
OTU1 → 1 × ODU1 → 2 × ODU0
- 1 × ODU1 in each OTU1 ITU-T G.709The OTU1 frame carries exactly one ODU1. The line-rate gap is OTU overhead and FEC.
- 2 × ODU0 in each ODU1 ITU-T G.709Two 1.25 Gbit/s tributary slots, one ODU0 each.
- 1 ODU1
- 1 × 2 = 2 ODU0s
Leftover capacity
177.737143 Mbit/s of each OTU1 line rate (2.666057143 Gbit/s) sits outside 2 × 1.244160 Gbit/s of ODU0 line rate (2.488320 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.