3Com - 3C16476BS Baseline Switch 2250 Plus. 48 ports 10/100 BASE-T and 2 dual-purpose ports For Gigabit copper or SFP slots For 1000Base-SX or 1000Base-LX fiber Auto MDI/MDIX on all ports. 255
3CRS42G-48-91 3Com 4210G-48 Gigabit Stackable Ethernet Switch 48-Ports Manageable 48 x RJ-45 Stack Port 6 x Expansion Slots 10/100/1000Base-T
3CR17762-91 3Com 4500G-48-Ports Stackable Ethernet Switch 4 x SFP (mini-GBIC), 2 x
3Com 3C17172-91 Superstack 4 Switch 5500-EI PWR 52 Port
Amazon.com: 3Com - 3C16476BS Baseline Switch 2250 Plus. 48 ports 10/100 BASE-T and 2 dual-purpose ports For Gigabit copper or SFP slots For 1000Base-SX or 1000Base-LX fiber Auto MDI/MDIX on all ports.