How many E2s are in an E4?

Working

E4 → 4 × E3 → 4 × E2

1. 4 × E3 in each E4 ITU-T G.702Four E3s.
2. 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.

E4 reference · E2 reference · Open in the converter