digital signal hierarchy 
digital signal hierarchy
Telecom Definition
The hierarchy of digital signal levels in the European E-carrier, Japanese J-carrier, and North American T-carrier systems. In the North American hierarchy, the term digital signal (DS) level is specifically used. See Table D-1 for a side-by-side comparison. See E-carrier, J-carrier, and T-carrier.
Table D-1: Digital Hierarchy: T-Carrier, E-Carrier, and J-Carrier
| Signal Level | Number of Data Channels | Total Signaling Rate (Mbps) | ||
|---|---|---|---|---|
| T-Carrier (North America) | E-Carrier (Europe) | J-Carrier (Japan) | ||
| 0 | 1 | 0.064 | 0.064 | 0.064 |
| 1 | 24 | 1.544 | 1.544 | |
| 30 | 2.048 | |||
| 1C | 48 | 3.152 | ||
| 2 | 96 | 6.312 | 6.312 | |
| 120 | 8.448 | 7.786 | ||
| 3 | 480 | 34.368 | 32.064 | |
| 672 | 44.736 | |||
| 3C | 1,344 | 91.053 | ||
| 4 | 1,440 | 97.728 | ||
| 1,920 | 139.268 | |||
| 4,032 | 274.176 | |||
| 5 | 5,760 | 400.352 | ||
| 7,680 | 565.148 | 565.148 | ||
| 6 | 30,720 | 2200.00 | ||
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