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-48s are in an OTU3?
An OTU3 carries 16 OC-48s, per ITU-T G.709. This is a client mapping of OC-48 into ODU1.
16
OC-48s in an OTU3
Working
OTU3 → 1 × ODU3 → 16 × ODU1 → 1 × OC-48
- 1 × ODU3 in each OTU3 ITU-T G.709The OTU3 frame carries exactly one ODU3.
- 16 × ODU1 in each ODU3 ITU-T G.70916 ODU1s, two slots each.
- 1 × OC-48 in each ODU1 ITU-T G.709Client mappingCBR OC-48, the same client rate as STM-16, mapped into OPU1.
- 1 ODU3
- 1 × 16 = 16 ODU1s
- 1 × 16 × 1 = 16 OC-48s
Leftover capacity
3.205293559 Gbit/s of each OTU3 line rate (43.018413559 Gbit/s) sits outside 16 × 2.488320 Gbit/s of OC-48 line rate (39.813120 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 17.28, which floors to 17 OC-48s by bit rate only. The standard mapping is 16. Use the mapping.
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