Short for Optical Carrier, used to specify the speed of fiber optic networks conforming to the
SONET standard. The table shows the speeds for common OC levels.
| OC | Speed |
| OC-1 | 51.85 Mbps |
| OC-3 | 155.52 Mbps |
| OC-12 | 622.08 Mbps |
| OC-24 | 1.244 Gbps |
| OC-48 | 2.488 Gbps |
| OC-192 | 9.952 Gbps |
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OC
