TP-LINK 48-Port Gigabit Unmanaged PoE Switch 4-Port SFP Fiber Up 396W Each Port 30W (TL-SG1452P) - AliExpress
TP LINK TL SG1048 48 Port Gigabit Ethernet Switch Plug and Play Sturdy Metal w Shielded Ports Rackmount Fanless Traffic Optimization Unmanaged Black - Office Depot
TP-Link 48 Port Gigabit Ethernet Switch | Plug and Play | Sturdy Metal w/ Shielded Ports | Rackmount | Fanless | Lifetime Protection | Traffic Optimization | Unmanaged (TL-SG1048) - Newegg.com
TP-Link 48 Port Gigabit Ethernet Switch 1000M Network Hub Internet Splitter Plug and Play Rack Mounted Auto MDI/MDIX TL-SG1048