24+4G Rackmount Managed Ethernet Ring Switch 

• 24-port 10/100-TX and 4-port Gigabit RJ-45/SFP combo ports (10/100/1000 Base-TX, 1000Base-X)
• Non-Blocking Switching Performance, no collision or delay when wire-speed transmission
• Supports Jumbo Frame up to 9,216 byte
• RSTP and Multiple Super Ring (Rapid Super Ring, Rapid Dual Homing, MultiRing, TrunkRing)
• Maximum 12 x 100M Rings plus 2 Gigabit Rings aggregation capability
• VLAN, LACP, GVRP, QoS, IGMP Snooping, Rate Control, Online Multi Port mirroring
• Link Layer Discovery Protocol (LLDP), SNMP V1/V2c/V3, RMON and JetView Discovering and Management
• Advanced Security supports IP/Port Security, 802.1x and Access Control List
• Event Notification by E-mail, SNMP Trap, Syslog and Relay Output
• 90-264VAC or Dual 12-48VDC power input