Amazon.com: NETGEAR 48-Port Gigabit Ethernet Smart Switch (GS748T) - Managed, with 2 x 1G SFP and 2 x 1G Combo, Desktop or Rackmount, and Limited Lifetime Protection : Electronics
Ubiquiti+Networks+%28USW-PRO-48-POE%29+48+Port+Rack+Mountable+Switch for sale online | eBay
48 ports POE Ethernet Switch with 48 POE ports power to camera, wireless ap, with 48 10/100M 2 port 1000M 2 port SFP COMBO - 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