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    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
    OC-255 = 13.21 Gbps