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-12s are in an OTU2?
An OTU2 carries 16 OC-12s, per ITU-T G.709 and Telcordia GR-253. This path maps OC-192 into ODU2 as a client, then follows that client's tributaries.
16
OC-12s in an OTU2
Working
OTU2 → 1 × ODU2 → 1 × OC-192 → 16 × OC-12
- 1 × ODU2 in each OTU2 ITU-T G.709The OTU2 frame carries exactly one ODU2.
- 1 × OC-192 in each ODU2 ITU-T G.709Client mappingCBR OC-192, the same client rate as STM-64, mapped into OPU2.
- 16 × OC-12 in each OC-192 Telcordia GR-25316 × OC-12. Channelized OC-192 is 192 STS-1s.
- 1 ODU2
- 1 × 1 = 1 OC-192
- 1 × 1 × 16 = 16 OC-12s
Leftover capacity
755.945316 Mbit/s of each OTU2 line rate (10.709225316 Gbit/s) sits outside 16 × 622.080 Mbit/s of OC-12 line rate (9.953280 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 17.21, which floors to 17 OC-12s by bit rate only. The standard mapping is 16. Use the mapping.
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