Re: PMD discussion
Rich:
I believe you misunderstood my mail to conclude your comments too quickly.
I never mentioned that I like the 12.5 Gbps 8B/10B coding to be replaced by
10.3125 Gbps 64b/66b.
We are discussing serial vs parallel issues.
We are too much involved in resolving PMD issues right now, and I believe no
one is interested in bring the coding scheme back to reflector at this moment.
Please do not intiate this one. let us focuse on PMD issues.
Regards,
Ed Chang
Ed,
The benefit of using existing components, testing, staffing, packaging at ~10
Gbps as opposed to 12.5 Gbps can not be overstated. As you say yourself
frequently: "There's no free lunch". The price of lunch is a bit more
complexity. However, this is an excellent tradeoff.
64B/66B improves "time to market" by moving development from expensive,
complex
and non-existant optics to relatively straightforward digital logic.
Since you are still pushing this tangent based on your latest response, I
gather
that you believe that 64B/66B will INCREASE time to market for any PMDs that
use
it. My sense is exactly the opposite. That is, using 8B/10B @ 12.5 Gbps
instead
will increase time to market based on the "long pole" development of 12.5
Gbps
laser and other optoelectronic components, test equipment, etc.
Best Regards,
Rich
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