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Features:• 20-port managed gigabit switch with 16-port PoE.• Transmits data at a high speed through USB 3.0.• Layer 2 network management PoE switch.• Supports web, and network management software based on SNMP.• Network redundancy: STP/RSTP.• Supports PD alive mode.• The red ports support t IEEE802.3af, IEEE802.3at, IEEE802.3bt and the Hi-PoE standards, max 90W.• Intelligent PoE controls over power consumption and offers real-time monitoring.• Non-blocking video transmission due to large buffer memory.• Supports desktop-mount installation.• Supports IEEE 802.3, IEEE 802.3u, IEEE 802.3x, IEEE 802.3ab, IEEE 802.3z, IEEE 802.3ad standards.• Conforms to IEEE802.3af and IEEE802.3at power supply standard.Technical Specifications:• Model S4220-16GT-190.• Ethernet Port: 18x 10/100/1000Mbps, SFP 2x 1000Mbps; PoE ports: 16x 10/100/1000Mbps.• Ports 1-16: RJ45 10/100/1000 Mbps(PoE); Ports 17-18: RJ45 10/100/1000 Mbps; Ports 19-20: SFP 1000 Mbps.• PoE Power consumption: Full load = 190W, Idling: