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 ODU0s are in an OTU4?
An OTU4 carries 80 ODU0s, per ITU-T G.709.
80
ODU0s in an OTU4
Working
OTU4 → 1 × ODU4 → 80 × ODU0
- 1 × ODU4 in each OTU4 ITU-T G.709The OTU4 frame carries exactly one ODU4.
- 80 × ODU0 in each ODU4 ITU-T G.70980 ODU0s, one per 1.25 Gbit/s tributary slot.
- 1 ODU4
- 1 × 80 = 80 ODU0s
Leftover capacity
12.277173568 Gbit/s of each OTU4 line rate (111.809973568 Gbit/s) sits outside 80 × 1.244160 Gbit/s of ODU0 line rate (99.532800 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
By bit rate only
Dividing the line rates gives 89.86, which floors to 89 ODU0s by bit rate only. The standard mapping is 80. Use the mapping.
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