Re: [802.3_SPEP2P] 802.3dg at May interim

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To: STDS-802-3-SPEP2P@xxxxxxxxxxxxxxxxx

Subject: Re: [802.3_SPEP2P] 802.3dg at May interim

From: Wayne Larsen <wayne@xxxxxxxxxxxxxxx>

Date: Tue, 9 May 2023 14:22:45 +0000

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Reply-to: Wayne Larsen <wayne@xxxxxxxxxxxxxxx>

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Thread-topic: 802.3dg at May interim

Hi,

I intend to make motions at the May 17 meeting of dg concerning the link segment specifications.

Wayne Larsen CommScope

From: George Zimmerman <george@xxxxxxxxxxxxxxxxxxxx>
Sent: Monday, May 1, 2023 12:23 PM
To: STDS-802-3-SPEP2P@xxxxxxxxxxxxxxxxx
Subject: [802.3_SPEP2P] 802.3dg at May interim

All – since I haven’t received any requests for an ad hoc, it appears that our next meeting will be at the interim.

I am requesting that you let me know of presentation requests by MONDAY next week, rather than the usual “Thursday before the meeting” because I will be unavailable from Thursday through Sunday (when I leave for the interim).

You can still get me the presentation by Monday morning of the interim week.

In order to make progress (even in July) we need some substantitive discussion of PHYs at the interim. I would characterize the discussion we have had to date as ‘preliminary’. It has been useful in validating bandwidth needs (which was what was needed) but not really at the level of detail that produces good baseline progress.

We have discussed getting contributions regarding impulse (and other nonstationary) noise sources in our expected operational environments. These will help PHY progress.

PHY discussions will need to get beyond just PAM levels and FEC gain, and start considering PCS structure, latency, and encoding. Note that these will be key in evaluating impulse noise performance and that will take time.

Experience from 10BASE-T1L in the field would also be welcome.

And, of course, we should also discuss how we expect powering to be handled.

Additional contributions, of course, are welcome – these are just suggestions to help get us towards baselines.

George Zimmerman, Ph.D.

President & Principal

CME Consulting, Inc.

Experts in Advanced PHYsical Communications

george@xxxxxxxxxxxxxxxxxxxx

310-920-3860

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