L2/4 Fast Ethernet Stackable Switch with 48x 10/100Base-T (RJ45) ports, 2x Gigabit Ethernet Combo RJ45/SFP and 2x 1000Base-T (RJ45) ports for stacking or uplink

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SFP Optical Transceiver Module, Gigabit Ethernet 1000Base-SX, Extended MM, 1310 nm, FP, 3.3 V, TX: -9 ~ -1 dBm, RX: -20 dBm, TTL, (2 km for 62,5/125um fiber, 1 km for 50/125um fiber), Dual LC connectors, Op. Temp. 0-70 °C, with Digital Diagnostic

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