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A presentation on the Clause 98 Technology Ability Field was given by Philip Curran to the 802.3dg task force, at the Telephonic Interim on Tuesday September 9.
The key point of this presentation is that if we adopt all the technology ability field bit assignments currently proposed by the 802.3dg and 802.3dm working groups we will have used 20 of the available 27 bits. We will soon run out of bits and will need to
take an alternative approach. We could use a Next page exchange, but that will increase the link establishment time. We are not using the technology ability bits efficiently, the bit assignments allow for combinations of PHYs to share a link that does not
make sense in practice.
I have talked to a number of members of the 802.3dm Task Force about this at the September Interim. I would ask you to look at the following presentation for consideration of the basis of an approach that could resolve this. The 802.3dg and 802.3dm task forces
could work together to agree an approach. If we want to make a change, we need to do it now before any more technology bits are used up and it becomes too late.
The presentation is as follows including a link to the 802.3dg public area.
Title: Clause 98 Technology Ability Field
Authors: Philip Curran, Niall Fitzgerald, Brian Murray, Jacobo Riesco Link: https://www.ieee802.org/3/dg/public/May_2025/Curran_3dg_01_09162025.pdf
Thanks
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