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Quidway® S8500 100M Ethernet Interface Board Overview Quidway® S8500 core route switch developed by Huawei can provide 20-port and 48-port 100 M Ethernet interface boards externally, including FT48 and FP20. Where, FT48 board provides forty-eight 100 M Ethernet electrical interfaces externally and FP20 provides twenty 100 M Ethernet optical interface.