:.. 52 PoE Ethernet Ports. - 48 PoE 10/100 Mbps BASE-T Ports. - 4 SFP Ports LED Indicators:. - Per Device: Power. - Per Device: Fan. - Per Port: Link/Activity/Speed Number of Ports: 52 Switching Capacity: 104 Gb/s Ram Buffer: 3.0 MB Max. Forwarding Rate: 77.4 Mpps MTBF: 481,624 Hours Web Smart Switch IEEE 802.3x Flow Control D-Link Green 3.0 Technology. - Power Saving Mode. - Smart Fans. - Reduced Heat Dissipation. - Cable Length Detection Auto or Configurable MDI/MDIX Store-&-Forward Switching Scheme Auto Surveillance VLAN Bandwidth Control Quality of Service (QoS)