OC3-OC1920

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Cards (8)

  • The OC stands for optical carrier, since these services are delivered over fiber-optic cables.
  • They still have channelized data and require CSU/DSU -- it just happens to be delivered over a fiber cable via a SONET ring.
  • An OCI has a speed of 51.84 Mbps.
  • Unfortunately, there is some overhead in an OC1, which takes usable bandwidth to approximately, 50 Mbps.
  • We use the 51.84 Mbps when calculating OC speeds.
  • An OC3 is three OC1s combined together to supply approximately 150 Mbps of bandwidth.
  • An OC12 is 12 OC1s combined together to supply approximately 600 Mbps of bandwidth.
  • An OC-1920 is 1920 OC1s combined together to supply 100 Gbps, which is currently the top speed of optical carriers.