STM-0
STM-0 is the 51.840 Mbit/s SDH signal, the same line rate as OC-1. It carries one VC-3: 21 E1s, 28 DS1s, one E3 or one DS3. Higher STM-N signals are built from STM-1s, not from STM-0s.
- Family
- SDH
- Line rate
- 51.840 Mbit/s51,840,000 bit/s
- Payload rate
- 50.112 Mbit/s50,112,000 bit/s
- Standard
- ITU-T G.707
Same line rate as OC-1.
Contains breakdown, down to DS0 · Open in the converter
Direct mappings
| Contains | Count | Mapping | Source | Note |
|---|---|---|---|---|
| 1 E3 | 1 | Client mapping | ITU-T G.707 | One TU-3 / VC-3 carrying an E3. |
| 1 DS3 | 1 | Client mapping | ITU-T G.707 | One VC-3 carrying a DS3. |
| 21 E1s | 21 | Tributary | ITU-T G.707 | One VC-3 holds 7 TUG-2 × 3 TU-12 (E1). |
| 28 DS1s | 28 | Tributary | ITU-T G.707 | One VC-3 holds 7 TUG-2 × 4 TU-11 (DS1). |