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RE: Equalization and benefits of Parallel Optics.


I also understand our objectives in the same way. We don't have an 
objective for 100 m computer room connections. It seems to me the 300 m 
objective was written for computer rooms. The 300 m over MMF could be 
applied to any fiber solution.



At 12:55 PM 7/27/2000 -0700, Booth, Bradley wrote:

> 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
>                 Brad
>                 > 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
>                 > X-Resent-To: Multiple Recipients
>                 > X-Listname: stds-802-3-hssg
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>                 > X-Moderator-Address:
>                 >
>                 >
>                 > 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
>                 Thanks,
>                 Ali Ghiasi
>                 Sun Microsystems
>                 >

Paul A. Bottorff, Director Switching Architecture
Enterprise Solutions Technology Center
Nortel Networks, Inc.
4401 Great America Parkway
Santa Clara, CA 95052-8185
Tel: 408 495 3365 Fax: 408 495 1299 ESN: 265 3365
email: pbottorf@xxxxxxxxxxxxxxxxxx