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why two different coding schemes ?





Hi, I'm new to 10 Gb/s ethernet. Could somebody explain why two
different
coding schemes are being contemplated for 10GE ? i.e. 8B/10B and 64B/66B
?
Why not stick with just one to simplify life for everybody ?

Also, are there any vendors with tentative 10GE products coming out soon
?

thanks
jagmit sandhu