52-Port 10/100/1000Mbps Gigabit Smart Switch with 4 x Combo SFP ports - 52 x 10/100/1000Mbps Auto-Negotiating Ports - 4 x Combo SFP ports - Switching Capacity 104 Gbps - Advance power saving features – Max power consumption 43.50 Watts - Fanless design - Half-/Full-Duplex, auto-negotiation, Auto MDI/MDIX - IEEE 802.3x Flow Control - 802.3ad Link Aggregation - Asymmetric VLAN, Auto Voice VLAN - 802.1p priority queues - MAC/IP filtering - MAC/IP-based ACL 450 rules - 802.1X port-base Access Control, Port Security - LLDP, LLDP-MED, Smart Binding, Traffic Segmentation - IPv6 configurations - D-Link Safequare Engine - Smart Console Utility, web based management, compact CLI - D-View 6.0 support - 19" Rackmount Installation - IEEE 802.3az EEE - 440mm x 250mm x 44mm 4.1 Kg