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YuanLey 48 Port Gigabit PoE Switch Unmanaged with 2 1000Mbps SFP Uplink, 50 Port 802.3af/at 800W High Power PoE+ Network Switch, Metal Rackmount Power Over Ethernet Switch: Amazon.co.uk: Computers & Accessories
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48 Port Switches: Gigabit, PoE, & More | NETGEAR
Ubiquiti UniFi 48 Port PoE Pro Switch (USW-Pro-48-POE)