The Physical layer protocol (PHY) standard deals with datat encoding,
clocking and symbols. PHY specifies a group-encoding method called 4B/5B.
This encoding method translated upper-layer octects into pairs of five
symobls
that perform the dual functions of passing data and maintaining clock
synchronization
between nodes.
The text above is quoted from Page 62, chapter 3, ICRC, Laura Chappell.
Hope this help
Vincent Chong
""William Wong"" Dear all
>
> I couldn't find any information on this. Can you guys tell me what is
this?
>
> Thanks.
>
> William
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