2.4.5 PMA (Physical Medium Attachment) Sublayer
The PMA sublayer provides a medium independent interface for the PCS to support a
wide range of physical media. The PMA functions vary depending on the type of PCS,
but in general the functions performed by the PMA include:
a) Mapping of data streams between the PCS and PMD and vice-versa, and between
the WIS and the PMD layers for a 10GBASE-W implementation.
b) Serialization of parallel data streams from the PCS to be presented to the serial
PMD, and deserialization of received PMD data streams to be presented to the PCS.
c) Clock recovery from the received data stream.
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