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[802.3_NGMMF] what form for our objectives? please discuss



Dear Colleagues,

 

Happy New Year!

 

Please consider several options for the form of objectives that will be produced by the Study Group for “Next-Gen 200 & 400 Gb/s PHYs over fewer MMF pairs than Existing Ethernet Projects & Standards.”  These differences arise from 1) different forms of objectives in recent projects plus 2) whether we should choose the number of fiber pairs for a speed in Study Group vs. Task Force. (I only included single-pair and even numbers of fiber pairs, since those are the practical choices.) Historically we have not specified that a specific grade of MMF was required to meet the objective. I show a 400 Gb/s example below, but the options would apply to a 200Gb/s objective as well.

Q. What are the pro’s and con’s of these options? Which do you prefer?

 

        Define a 400Gb/s PHY for operation over fewer than 16 pairs of MMF with channel lengths up to at least 100 m.

        Define a 400Gb/s PHY for operation over (specify 1 vs. 2 vs. 4 vs. 8) pairs of MMF with channel lengths up to at least 100 m.

        Provide physical layer specifications which support 400Gb/s operation over fewer than 16 pairs of MMF with channel lengths up to at least 100 m.

        Provide physical layer specifications which support 400Gb/s operation over (specify 1 vs. 2 vs. 4 vs. 8) pairs of MMF with channel lengths up to at least 100 m.

 

Let us have a healthy discussion in advance of the 1/11 telecon, so we can begin to write down draft objectives.

 

Warm regards,

Robert

 

Robert Lingle, Jr., Ph.D.
Acting Chair, IEEE 802.3 NGMMF Study Group

Director, OFS Systems & Technology Strategy

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