| Common Name | Capacity | Comment |
| DS0 | 64kbps | Basic Building Block for Fractional DS1 |
| DS1 | 1.544Mbps | 8kbps for framing, 1.536Mbps usable |
| E1 | 2.048Mbps | Europe and Japan |
| E3 | 34.368Mbps | Europe and Japan |
| DS3 | 44.736Mbps | 672 DS0s |
| OC-1 | 51.840Mbps | Optical Fiber |
| OC-3 | 155.520Mbps | Optical Fiber; 3 x 51.840Mbps |
| OC-3c | 155.520Mbps | Optical Fiber; "c" stands for concatenated |
| OC-12 | 622.080Mbps | Optical Fiber |
| OC-48 | 2,488.320Mbps | Optical Fiber |
When it is run over a 4-wire copper cable, a DS1 is known as a T1. When a DS3 is run over coaxial cable it is known as a T3.
The "c" in OC-3c means the entire bitstream is concatenated into a single framing format reducing overhead. Ordinary OC-3 pipes are actually three distinct 51.840 Mbps bitstreams (OC-1) each carrying a separate framing overhead.
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