[802.3_ISAAC] Questions on convergence

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[802.3_ISAAC] Questions on convergence - Link Delay

To: STDS-802-3-ISAAC@xxxxxxxxxxxxxxxxx

Subject: [802.3_ISAAC] Questions on convergence - Link Delay

From: TJ Houck <TJ.Houck@xxxxxxxxxxxx>

Date: Sun, 18 Jan 2026 15:57:16 +0000

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Thread-topic: Questions on convergence - Link Delay

Hi Everyone,

I’ve been reviewing the recent contributions, including muma_3dm_01_0126.pdf, and I want to step back and ask a broader architectural question.

Several proposals now converge on a ~160ns link segment delay as necessary to support longer cable reach. This conclusion directly reflects physical constraints and trade-offs that were previously discussed in earlier contributions addressing link delay budgets, PoC interactions, and reach limitations across 802.3dm use cases.

Given this emerging convergence, I’d like to ask:

Should the TF consider normalizing ~160ns as a common architectural requirement across solutions, rather than treating it as an isolated optimization within a single approach?
How does the TF intend to ensure continuity between assumptions in recent proposals and prior contributions already presented that explored these same delay and reach trade-offs?

My intent here is to ensure we have a consistent technical foundation, rather than re-deriving the same constraints in parallel.

Appreciate the clarification and discussion,

Best Regards

TJ Houck

Infineon Technologies Americas Corp. – Detroit

System Architect

tj.houck@xxxxxxxxxxxx

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