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Physical coding sublayer

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Physical Coding Sublayer (PCS) Specifications:

10GBASE-R is the serial encoded PCS that allows for Ethernet framing at a rate of approximately 10.3gbps. This rate does not match the rate 9.953gbps used in SONET and SDH and is not supported over a WAN based on SONET or SDH.

10GBASE-X is only used in the definition of 10GBASE-LX4 which is What sets it apart from 10GBASE-R.

10GBASE-W defines WAN encoding for 10GbE, it encodes the frames so that they are compatible with SONET and SDH transmission standards allowing for 10gbps transmission across a WAN. While the WAN PHY is not fully compatible with SONET it is often described as a “SONET friendly variant of 10GbE.”

Written By: Cdvallee

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