Features:• 20-port managed gigabit switch with 16-port PoE• Transmits data at a high speed through USB 30• 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 IEEE8023af, IEEE8023at, IEEE8023bt 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 8023, IEEE 8023u, IEEE 8023x, IEEE 8023ab, IEEE 8023z, IEEE 8023ad standards• Conforms to IEEE8023af and IEEE8023at power supply standardTechnical 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: <20W; Port 1-2 = 90 W, Port 3-16 = 30 W• Power consumption management: yes• PoE PIN Assignment: 1, 2, 4, 5 (V+), 3, 6, 7, 8 (V-)• Communication standards: IEEE 8023, IEEE 8023u, IEEE 8023x, IEEE 8023ab, IEEE 8023z, IEEE 8023ad• PoE protocol: IEEE8023af (PoE); IEEE8023at (PoE+); Hi-PoE; IEEE8023bt (PoE++)• Switching capacity: 56 Gbps• Packet forwarding rate: 2976 Mpps• Packet buffer memory: 41 Mbit• MAC Table size: 8K• Jumbo Frame: 10K Byte• VLAN Number: 4K• VLAN Interface: 10• Dynamic ARP: 512• MTBF: 46712573 hours• Long distance PoE: 250 m long distance PoE transmission• Spanning Tree Protocol: STP; RSTP• Link Aggregation: Static link aggregation; LACP• Multicast: IGMP Snooping• DHCP Function: DHCP client; DHCP-Server; DHCP-Snooping• Security: IEEE 8021x ACL• Equipment Management: WEB(http and https); Telnet; SNMP V1/V2C/V3• Application humidity: 5%~95%• Power supply: 48V – 57V DC• Lightning Protection Common Mode: 4 kV• Differential mode: 2 kV• ESD Protection Air discharge: 8 kV• Contact discharge: 6 kV• Working temperature: -10°C~55°C• Weight: 3405 kg• Dimensions(W×D×H): 440 mm × 300 mm × 44 mmTransmission Performance:Switch power supply voltage 53VCAT5E/CAT6 Max DC resistance < 10ohm/100mCable(m) – Load Capacity(W) – Bandwidth(Mbps)IEEE8023bt 90W:100m Cable; 713W Load Capacity; 1000Mbps Bandwidth150m Cable; 62W Load Capacity; 10Mbps Bandwidth200m Cable; 51W Load Capacity; 10Mbps Bandwidth250m Cable; 40W Load Capacity; 10Mbps BandwidthHi-PoE 60W:100m Cable; 53W Load Capacity; 1000Mbps Bandwidth150m Cable; 50W Load Capacity; 10Mbps Bandwidth200m Cable; 47W Load Capacity; 10Mbps Bandwidth250m Cable; 37W Load Capacity; 10Mbps BandwidthIEEE8023at 30W:100m Cable; 255W Load Capacity; 1000Mbps Bandwidth150m Cable; 255WLoad Capacity; 10Mbps Bandwidth200m Cable; 255WLoad Capacity; 10Mbps Bandwidth250m Cable; 255WLoad Capacity; 10Mbps BandwidthNote: The actual transmission distance may vary due to power consumption of connected devices or the cable type and status