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TP-LINK JetStream 8-Port Gigabit L2+ Managed Switch with 2 SFP Slots (TL-SG3210) - The source for WiFi products at best prices in Europe - wifi-stock.com
1.25G Media Converter(kit #2), SFP Slot, with a SFP Module, SMF, 1310 nm, 20 km|Fiber Optic Equipments| - AliExpress
China Sfp Ethernet Switch - 4 Port Gigabit Ethernet Switch and 2 SFP Ports 1000M fiber optic transceiver switch – HDV Manufacturer and Supplier | HDV