Result: standard mapping
How many OC-12s are in an ODU2?
An ODU2 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 ODU2
Working
ODU2 → 1 × OC-192 → 16 × OC-12
- 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 OC-192
- 1 × 16 = 16 OC-12s
Leftover capacity
83.993924 Mbit/s of each ODU2 line rate (10.037273924 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.