Result: standard mapping
How many E3s are in an E4?
An E4 carries 4 E3s, per ITU-T G.702.
4
E3s in an E4
Working
E4 → 4 × E3
- 4 × E3 in each E4 ITU-T G.702Four E3s.
- 4 E3s
Leftover capacity
1.792 Mbit/s of each E4 line rate (139.264 Mbit/s) sits outside 4 × 34.368 Mbit/s of E3 line rate (137.472 Mbit/s). That remainder is overhead, fixed stuff or justification. It is not another whole tributary.