3COM network switch with 48 10/100/1000Gb ports, has 4 x SFP ports (normally used for 1Gb fiber connections). Also have 2 x SFP 1Gb fiber GBIC modules (3CSFP91), 850nm 1000BASE-SX Fully working, removed due to upgrade to PoE+, says 2 fans are failing (although they all are running), shows as red fault light - 3COM SuperStack 3 Switch 3870 - 3CR17451-91 - 1U rack mount (with mounting ears) - Has original box (with correct serial number) - Used in a smoke free environment, owned from new - 6 x 20 x 22 (15lbs / 7kg)