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Amazon.com: 10Pcs SFP Network Transceiver Module, 1.25 Gigabit Single Mode LC Duplex 1000BASE-LX Dual Fiber SFP 20km 1310nm : Electronics
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Should both Fiber SFP modules show a laser light in one of the two (duplex) receptacles? : r/HomeNetworking
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Amazon.com: TP-LINK Gigabit SFP module, 1000Base-SX Multi-mode Fiber Mini GBIC Module, Plug and Play, LC/UPC interface, Up to 550/220m distance (TL-SM311LM) : Electronics
StarTech.com 1000BASE EX MSA Compliant SFP Module LC Connector Fiber SFP Transceiver Lifetime Warranty 1 Gbps Max. Transfer Distance 40 km 24.8 mi 1000BASE EX fiber transceiver adds reliable 1Gb over fiber
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Amazon.com: 10GBase-SR SFP+ Transceiver, 850nm MMF, up to 300 Meters, Compatible with Cisco SFP-10G-SR, Meraki MA-SFP-10GB-SR, Ubiquiti UniFi UF-MM-10G, Fortinet, Mikrotik, Netgear, TP-Link and More : Electronics
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