HGW-1604SM-PSE - 16x RJ45 + 4x SFP ports Gigabit Ethernet Managed PoE Industrial fiber switch 240W total power, DIN rail mount, -40 to +75 Celsius
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Amazon.com: Mini Industrial 4 Port 10/100/1000Mbps Gigabit Ethernet Switch with SFP Din Rail/Wall-Mount 10/100/1000BASE-T RJ45 + 1 100/1000FX (SFP) Support 12-48V DC 10Gbps Switching Capacity : Electronics
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Amazon.com: Mini Industrial 4 Port 10/100/1000Mbps Gigabit Ethernet Switch with SFP Din Rail/Wall-Mount 10/100/1000BASE-T RJ45 + 1 100/1000FX (SFP) Support 12-48V DC 10Gbps Switching Capacity : Electronics
Cisco SGE2010 48-Port Managed Gigabit Ethernet Switch 4 x SFP Small Business | eBay