E4
E4 is the 139.264 Mbit/s multiplex of four E3s, which is 64 E1s. An STM-1 can carry one E4 as a client, but the native SDH tributary count is 63 E1s.
- Family
- E-carrier
- Line rate
- 139.264 Mbit/s139,264,000 bit/s
- Payload rate
- 122.880 Mbit/s122,880,000 bit/s
- Standard
- ITU-T G.702
Contains breakdown, down to DS0 · Open in the converter
Direct mappings
| Contains | Count | Mapping | Source | Note |
|---|---|---|---|---|
| 4 E3s | 4 | Tributary | ITU-T G.702 | Four E3s. |
| 64 E1s | 64 | Tributary | ITU-T G.702 | 64 E1s, which is 4 E3s × 16 E1s. |