RE: PMD discussion
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@earthlink.net]
> 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@jatotech.com
> > > ___________________
> >
> > --
> > Joel Goergen
> > Force10 Networks
> > 1440 McCarthy blvd
> > Milpitas, Ca, 95035
> >
> > Email: joel@force10networks.com
> > 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@nSerial.com
> Santa Clara, CA 95054 http://www.nSerial.com
>