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Re: XAUI, SFF connectors


What need does an interface card have for SFF connectors that can only put 
one optical port within a 13 inch copper etch radius?  From what you and 
others are making us believe, the form factor requirements for 10GbE are so 
large that SFF connectors are a non-issue.  If 10GbE interfaces are going 
to be so dense that we will need SFF connectors, why did we need XAUI?  I 
can't see how you would need both.

Thank you,
Roy Bynum

At 10:13 PM 7/23/00 -0700, Rich Taborek wrote:

>As is usually the case, you always bring up interesting tangential
>issues in your email. This time it's:
>"Given the form factor that would use XAUI, SFF connectors would not be
>a requirement."
>What in the world does the XAUI interface, specified for use as an XGMII
>extender, have to do with SFF connectors???
>Please enlighten me.
>Best Regards,
>Roy Bynum wrote:
> >
> > Chris,
> >
> > I am not sure of your comment about LC having a proven track record for
> > single mode implementations.  At present, WorldCom has not deployed any
> > LC.  All of the connectors currently specified for SM installations is
> > SC.  A particular vendor is attempting to get WorldCom to make use of their
> > connectors.  ( I will not say how successful or not they are. )  Several
> > system vendors are attempting to make use of LC, but at present, none have
> > been certified.  Given the form factor that would use XAUI, SFF connectors
> > would not be a requirement.
> >
> > Thank you,
> > Roy Bynum
> >
> > At 04:28 PM 7/21/00 -0600, Chris Simoneaux wrote:
> >
> > >Our opinion is that LC is a better connector than MTRJ.  The LC does not
> > >seem to suffer the possible damage that MTRJ can see with high mate/demate
> > >cycles...due to the guide pin action.  Also, the LC has a proven track
> > >record for singlemode whereas the MTRJ does not.
> > >
> > >PS: My feeling is the standards body's charter should be to specify a
> > >connector. However, there's too much rhetoric in the procedure. Therefore
> > >it's difficult to choose the best solution.  Inevitably the real winner/s
> > >will come forward. Conclusion: Choose a connector at the standards 
> level as
> > >it can expose good points of each solution.
> > >
> > >Chris Simoneaux
> > >Picolight
>Richard Taborek Sr.                 Phone: 408-845-6102
>Chief Technology Officer             Cell: 408-832-3957
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