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 ODU3s are in an OTU4?
An OTU4 carries 2 ODU3s, per ITU-T G.709.
2
ODU3s in an OTU4
Working
OTU4 → 1 × ODU4 → 2 × ODU3
- 1 × ODU4 in each OTU4 ITU-T G.709The OTU4 frame carries exactly one ODU4.
- 2 × ODU3 in each ODU4 ITU-T G.709Each ODU3 takes 31 of the 80 ODU4 tributary slots, so 2 fit and 18 slots stay unused.
- 1 ODU4
- 1 × 2 = 2 ODU3s
Leftover capacity
31.171535602 Gbit/s of each OTU4 line rate (111.809973568 Gbit/s) sits outside 2 × 40.319218983 Gbit/s of ODU3 line rate (80.638437966 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
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