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I think option 1, “Define a 400Gb/s PHY for operation over fewer than 16 pairs of MMF with channel lengths up to at least 100 m” is how we have specified objectives
in the past, e.g., see 802.3cd: “Define 200 Gb/s PHYs for operation over MMF with lengths up to at least 100m” Best regards, Steve Steven E. Swanson Senior Standards Manager Distinguished Associate Global Technology & Industry Standards MT&E Corning Optical Communications 800 17th Street NW Hickory, NC 28603-0489 t 828-901-5328 t 607-974-5757 m 607-725-1129 swansonse@xxxxxxxxxxx Standards are a bridge between markets and technologies; whoever controls the bridge controls the future… From: Lingle, Robert L (Robert) [mailto:rlingle@xxxxxxxxxxxxx]
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?
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Define a 400Gb/s PHY for operation over fewer than 16 pairs of MMF with channel lengths up to at least 100 m.
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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.
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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.
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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. Director, OFS Systems & Technology Strategy
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