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 ODU4?
An ODU4 carries 40 OC-48s, per ITU-T G.709. This is a client mapping of OC-48 into ODU1.
40
OC-48s in an ODU4
Working
ODU4 → 40 × ODU1 → 1 × OC-48
- 40 × ODU1 in each ODU4 ITU-T G.70940 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.
- 40 ODU1s
- 40 × 1 = 40 OC-48s
Leftover capacity
5.261645815 Gbit/s of each ODU4 line rate (104.794445815 Gbit/s) sits outside 40 × 2.488320 Gbit/s of OC-48 line rate (99.532800 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 42.11, which floors to 42 OC-48s by bit rate only. The standard mapping is 40. Use the mapping.
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