Result: standard mapping
How many STM-64s are in an OTU2?
An OTU2 carries 1 STM-64, per ITU-T G.709. This is a client mapping of STM-64 into ODU2.
1
STM-64 in an OTU2
Working
OTU2 → 1 × ODU2 → 1 × STM-64
- 1 × ODU2 in each OTU2 ITU-T G.709The OTU2 frame carries exactly one ODU2.
- 1 × STM-64 in each ODU2 ITU-T G.709Client mappingCBR STM-64 mapped into OPU2.
- 1 ODU2
- 1 × 1 = 1 STM-64
Leftover capacity
755.945316 Mbit/s of each OTU2 line rate (10.709225316 Gbit/s) sits outside 1 × 9.953280 Gbit/s of STM-64 line rate (9.953280 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.