Result: standard mapping
How many OC-48s are in an ODU2?
An ODU2 carries 4 OC-48s, 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.
4
OC-48s in an ODU2
Working
ODU2 → 1 × OC-192 → 4 × OC-48
- 1 × OC-192 in each ODU2 ITU-T G.709Client mappingCBR OC-192, the same client rate as STM-64, mapped into OPU2.
- 4 × OC-48 in each OC-192 Telcordia GR-2534 × OC-48. Channelized OC-192 is 192 STS-1s.
- 1 OC-192
- 1 × 4 = 4 OC-48s
Leftover capacity
83.993924 Mbit/s of each ODU2 line rate (10.037273924 Gbit/s) sits outside 4 × 2.488320 Gbit/s of OC-48 line rate (9.953280 Gbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.