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 E3s are in an ODU0?
An ODU0 carries 12 E3s, per ITU-T G.709 and ITU-T G.707. This path maps STM-4 into ODU0 as a client, then follows that client's tributaries.
12
E3s in an ODU0
Working
ODU0 → 1 × STM-4 → 4 × STM-1 → 3 × E3
- 1 × STM-4 in each ODU0 ITU-T G.709Client mappingCBR STM-4 mapped into OPU0.
- 4 × STM-1 in each STM-4 ITU-T G.7074 × STM-1.
- 3 × E3 in each STM-1 ITU-T G.707Three VC-3s, each carrying an E3.
- 1 STM-4
- 1 × 4 = 4 STM-1s
- 1 × 4 × 3 = 12 E3s
Leftover capacity
831.744 Mbit/s of each ODU0 line rate (1.244160 Gbit/s) sits outside 12 × 34.368 Mbit/s of E3 line rate (412.416 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.
By bit rate only
Dividing the line rates gives 36.2, which floors to 36 E3s by bit rate only. The standard mapping is 12. Use the mapping.
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