TP-LINK 48-Port Gigabit Unmanaged PoE Switch 4-Port SFP Fiber Up 396W Each Port 30W (TL-SG1452P) - AliExpress
TP LINK TL SF1048 48 Port 10100Mbps Fast Ethernet Switch Limited Lifetime Warranty Plug and Play Rackmount Sturdy Metal w Shielded Ports Fanless Unmanaged - Office Depot