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RE: Equalization and benefits of Parallel Optics.


From my understanding of the objectives, the task force doesn't have a
distance objective of "100m data center applications."  We do have an
objective for 100m over installed MMF fiber.  That 100m distance objective
was chosen because it reflects what is used in the data center applications.
If the task force satisfies the objective (which is a requirement for the
task force to do), then we provide a solution for the application.  The
reverse is not true.  If task force satisfies the application, then we don't
meet our objectives.

Given that the task force has to satisfy objectives first and foremost, I
believe that it is key that the task force focus on those proposals that in
some manner satisfy an objective.  As I see it, parallel optics and parallel
fiber do not satisfy any of our objectives; therefore, the task force needs
to work on the ones that will satisfy our objectives.


		-----Original Message-----
		From:	ghiasi [mailto:Ali.Ghiasi@xxxxxxxxxxx]
		Sent:	Thursday, July 27, 2000 2:17 PM
		To:	stds-802-3-hssg@xxxxxxxx; bradley.booth@xxxxxxxxx
		Cc:	Ali.Ghiasi@xxxxxxxxxxx
		Subject:	RE: Equalization and benefits of Parallel


		> From: "Booth, Bradley" <bradley.booth@xxxxxxxxx>
		> To: stds-802-3-hssg@xxxxxxxx
		> Subject: RE: Equalization and benefits of Parallel Optics.
		> Date: Wed, 26 Jul 2000 18:29:56 -0700
		> MIME-Version: 1.0
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		> I have one question:
		> Which of our distance objectives is satisfied with
parallel fiber and
		> parallel optics?

		The 100 m data center applications.
		> It has been my interpretation that when we talked about
100m of installed
		> base of MMF, that we were referring to the MMF fiber
currently available for
		> use by 802.3z.  Parallel optics does not operate over this
installed base.

		You are correct parallel optics would not operate over an
installed two fiber
		plant.  Parallel optics would loose if you go in to an
installed fiber base.
		What I suggested was 100m data center applications, where
the fiber are not
		installed in the building wiring.

		Data center application are very significant as stated in
the last meeting
		about half the total market.  Solutions significantly lower
cost targeted
		for sub 100 m is needed, otherwise there will several
proprietary solutions.
		Parallel optics is the lowest cost, almost mature after 3
years, lowest power,
		and smallest foot print.  Parallel optics is ideal to get
bandwidth off the 
		edge of your board. 

		Serial 850 or CWDM 850 can be another candidate for low cost
data center
		applications by having cable advantage over parallell fiber.
But you need 
		to offset fiber advantage against power, size, cost,
testing, and maturity.   

		> Or am I missing the point here?
		> Cheers,
		> Brad


		Ali Ghiasi
		Sun Microsystems