RE: PMD discussion
The 4-lane XAUI/XGXS with 8B10B directly maps to 4-lambda WWDM.
Walt
> -----Original Message-----
> From: Joel Goergen [mailto:joel@xxxxxxxxxxxxxxxxxxx]
> Sent: Sunday, May 28, 2000 9:54 PM
> To: '802.3ae'
> Subject: Re: PMD discussion
>
>
>
> Walter,
>
> I like the second better, but for clarity, I have a question
> .... for the
> serial solution, my understanding is the thought is to use
> 64b66b on the
> fiber. What is the general thought for wdm? Is it just
> 8b10b or is the
> thinking in general that the line interface is 64b66b?
>
> Take care
> Joel
> -----------------------------
>
> Walter Thirion wrote:
>
> > First of all, thanks to everybody that presented PMD
> proposals at the last
> > meeting. I've sent my presentation to David Law, so it
> should be available
> > on the web site in the next couple of days.
> >
> > In listening to the discussion after my presentation and
> then going around
> > and talking to people, it feels to me like we're starting
> to converge. Not
> > there, yet, but making progress.
> >
> > The equipment manufacturers made it pretty clear they would
> like to see no
> > more than 3 PMDs in the standard. The PMD vendors have some
> concern that
> > using only 3 PMDs may sub-optimize certain objectives,
> however, they could
> > support the 3 PMD position if it is made clear which 3 PMDs
> the equipment
> > oems want.
> >
> > Based on an informal straw poll and anecdotal evidence, my
> opinion is the
> > first choice would be the set:
> > ________________
> > 850 nm WWDM
> > 1310 nm WWDM
> > 1550 nm Serial
> > ________________
> >
> > If that set isn't feasible, then the 2nd most popular choice is:
> > ________________
> > 850 nm WWDM
> > 1310 nm Serial
> > 1550 nm Serial
> > ________________
> >
> > Thoughts, feedback?
> >
> > Walt
> > ___________________
> > Walter Thirion
> > Chair, IEEE 802.3ae PMD Sub-Task Force
> > 301 Congress Ave.
> > Suite 2050
> > Austin, Texas 78701
> > Voice: 512-236-6951
> > Fax: 512-236-6959
> > wthirion@xxxxxxxxxxxx
> > ___________________
>
> --
> Joel Goergen
> Force10 Networks
> 1440 McCarthy blvd
> Milpitas, Ca, 95035
>
> Email: joel@xxxxxxxxxxxxxxxxxxx
> Direct: (408) 571-3694
> Cell: (612) 670-5930
> Fax: (408) 571-3550
>
>