A quick look inside a 48 port Netgear Prosafe GS748T v5 - YouTube
NetGear ProSafe GS748T V5 Gigabit Ethernet 48 Port Switch – St. John's Institute (Hua Ming)
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
Hub USB Netgear Smart GS748T - V5 - commutateur - L3 Lite - Géré - 48 x 10/100/1000 + 2 x Gigabit SFP + 2 x SFP Gigabit combiné - de bureau, Montable sur rack | Darty