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
Cisco CBS350 48P Managed Switch 48 Port GE PoE 4x1G SFP CBS350 48P 4G – Stack Link