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 an E4?

An E4 carries 16 E2s, per ITU-T G.702.

E2s in an E4

Working

E4 → 4 × E3 → 4 × E2

4 × E3 in each E4 ITU-T G.702Four E3s.
4 × E2 in each E3 ITU-T G.702Four E2s.

4 E3s
4 × 4 = 16 E2s

Leftover capacity

4.096 Mbit/s of each E4 line rate (139.264 Mbit/s) sits outside 16 × 8.448 Mbit/s of E2 line rate (135.168 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.

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