Quantity is how many containers you have. The result is how many tributaries fit, the path, and the leftover line rate. The choices stay in the URL, so you can share them.
Result: standard mapping
How many STM-16s are in an OTU2?
An OTU2 carries 4 STM-16s, per ITU-T G.709. This is a client mapping of STM-16 into ODU1.
4
STM-16s in an OTU2
Working
OTU2 → 1 × ODU2 → 4 × ODU1 → 1 × STM-16
- 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 × STM-16 in each ODU1 ITU-T G.709Client mappingCBR STM-16 mapped into OPU1.
- 1 ODU2
- 1 × 4 = 4 ODU1s
- 1 × 4 × 1 = 4 STM-16s
Leftover capacity
755.945316 Mbit/s of each OTU2 line rate (10.709225316 Gbit/s) sits outside 4 × 2.488320 Gbit/s of STM-16 line rate (9.953280 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
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