Re: PMD discussion
[Date: 05/28/2000 From Seto]
Yes, something called SUPI (Simple Universal PMD I/F) has been proposed by
Paul Bottorff. See his presentation at IEEE802.3ae May interim. I assume
this is a part of WAN PHY PMA.
to Rich,
I'd suggest that you give a new name for your 8B10B x 4ch coding scheme for
WWDM which includes idle pattern randomization. Any idea?
Seto
>
> Hi,
> The 4-lane code for WDM is 8b/10b. However, what happens in the case of WAN
> PHY?
> Is there any proposal for line code (Over the Fiber) for WDM WAN PHY?
>
> > -----Original Message-----
> > From: Rich Taborek [mailto:rtaborek@xxxxxxxxxxxxx]
> > Sent: Monday, May 29, 2000 7:15 AM
> > To: HSSG
> > Subject: Re: PMD discussion
> >
> >
> >
> > Joel,
> >
> > There are no complete 4-lane serial proposals for WDM on the
> > table which use a
> > transmission code other then 8B/10B. The 8B/10B 4-lane serial
> > proposals have
> > been essentially stable for more than 6 months now. It's
> > getting darn close to
> > July, any other candidate transmission codes for WWDM need to
> > get aired very
> > soon.
> >
> > Best Regards,
> > Rich
> >
> > --
> >
> > Joel Goergen wrote:
> > >
> > > 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
> >
> > -------------------------------------------------------
> > Richard Taborek Sr. Phone: 408-845-6102
> > Chief Technology Officer Cell: 408-832-3957
> > nSerial Corporation Fax: 408-845-6114
> > 2500-5 Augustine Dr. mailto:rtaborek@xxxxxxxxxxx
> > Santa Clara, CA 95054 http://www.nSerial.com
> >
>