OC-1 = SONET line with 51.84 Mbps

OC-1 has a payload of 50.112 Mbps with an overhead of 1.728 Mbps

OC-3 = 155.52 Mbps

OC – Optical Carrier

OC-192 = 9953.28 Mbps

OC1 – OC-3840 Carrier System