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 E2s are in a STM-0?
A STM-0 carries 4 E2s, per ITU-T G.707 and ITU-T G.702. This path maps E3 into STM-0 as a client, then follows that client's tributaries.
4
E2s in a STM-0
Working
STM-0 → 1 × E3 → 4 × E2
- 1 × E3 in each STM-0 ITU-T G.707Client mappingOne TU-3 / VC-3 carrying an E3.
- 4 × E2 in each E3 ITU-T G.702Four E2s.
- 1 E3
- 1 × 4 = 4 E2s
Leftover capacity
18.048 Mbit/s of each STM-0 line rate (51.840 Mbit/s) sits outside 4 × 8.448 Mbit/s of E2 line rate (33.792 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 6.13, which floors to 6 E2s by bit rate only. The standard mapping is 4. Use the mapping.
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