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 OC-768s are in an ODU4?
An ODU4 carries 2 OC-768s, per ITU-T G.709. This is a client mapping of OC-768 into ODU3.
2
OC-768s in an ODU4
Working
ODU4 → 2 × ODU3 → 1 × OC-768
- 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 × OC-768 in each ODU3 ITU-T G.709Client mappingCBR OC-768, the same client rate as STM-256, mapped into OPU3.
- 2 ODU3s
- 2 × 1 = 2 OC-768s
Leftover capacity
25.168205815 Gbit/s of each ODU4 line rate (104.794445815 Gbit/s) sits outside 2 × 39.813120 Gbit/s of OC-768 line rate (79.626240 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
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