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The Extreme Networks 10531 is a 20-meter active optical cable with SFP28 connectors, built for 25GbE links between switches, servers and storage in a data center. Active optics carry the signal over 20 meters where passive copper DACs fall off, and the cable is lighter and thinner than copper at that length. It is a single-vendor, single-link part: it suits network engineers cabling 25G ports across a rack row or between racks, not general-purpose buyers. Compared with passive DACs it costs more and draws a little power per end, but it reaches farther and bends more easily inside cable trays.
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This is a 20 meter active optical cable from Extreme Networks, model 10531. It is a direct attach cable with SFP28 connectors and supports 25GbE.
