The HS4420-16GT-190 from Dahua is a 20-port Hardened network switch with 16 PoE ports + 4 SFPs 1000 Mbps. IEEE802.3af power supply; IEEE802.3at; Hi-PoE; IEEE802.3bt. IEEE802.3 communication standard; IEEE802.3u; IEEE802.3x; IEEE802.3ab. Transmissions up to 250 meters - MAC Table Size 8K, PoE power on/off, Supports Intelligent PoE.
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NETWORK SWITCH 20 HARDENED PORTS - 16 POE PORTS + 4 SFP PORTS 1000 Mbps - DAHUA

Product details
- PoE Network Switch - Dahua
 - 16 PoE Ports + 4 SFP 1000 Mbps
 - PoE protocol: IEEE802.3af; IEEE802.3at; Hi-PoE; IEEE802.3bt
 - 190W PoE Power
 - Supported standards: IEEE802.3; IEEE802.3u; IEEE802.3x; IEEE802.3ab
 - 8K MAC address list capacity
 - Designed to resist high temperatures
 - Dimensions: 171mm × 123.4mm × 64.8mm
 
Data sheet
| Basic | |
| Switching Capacity | 40Gbps | 
| Packet Forwarding Rate | 29.76 Mpps | 
| Description of Function Slots | Port 1-16: 16 × RJ-45 10/100/1000 Mbps (PoE) Port 17-20: 4 × SFP 1000Mbps (uplink)  | 
| PoE Power | Port 1-2 ≤ 90W, Port 3-16 ≤ 30W, total ≤ 190W | 
| Layers | Layer 2 | 
| Management Type | Yes | 
| Operating Temperature | –30 °C to +65 °C (-22 °F to +149 °F) | 
| Operating Humidity | 5%–95% (RH), non-condensing | 
| Power Consumption | Idling: ≤5W ; Full load: 212W | 
| Power Supply | External power supply: 53 VDC, 3.77 A | 
| Statics Protection | Air discharge: 8 kV; Contact discharge: 6 kV | 
| Lighting Protection | Common mode: 4 kV; Differential mode: 2 kV | 
| Net Weight | 0.99kg (2.18lb) | 
| Product Dimensions | 171 mm × 123.4 mm × 64.8 mm (6.73" × 4.86" × 2.55") (L × W × H) | 
| Hardware | |
| Included Power Adapter | Yes | 
| PoE | Yes | 
| Ethernet Port | 16 | 
| Ethernet Port Speed | 10/100/1000Mbps | 
| Optical Port Uplink Speed | 1Gbps | 
| Reset Button | 1 | 
| Storage Temperatures | –40 °C to +70 °C (–40 °F to +158 °F) | 
| Storage Humidity | 5%–95% (RH), non-condensing | 
| Performance | |
| Packet Buffer Size | 4 Mbit | 
| Jumbo Frames | 15K Bytes | 
| MAC Table Size | 8K | 
| VLAN Number | 32 | 
| Communication Standards | IEEE802.3; IEEE802.3u; IEEE802.3x; IEEE802.3ab | 
| Features | |
| PoE Protocol | IEEE802.3af; IEEE802.3at; Hi-PoE; IEEE802.3bt | 
| PoE Power Consumption Management | Yes | 
| PoE Pin Assignment | 1,2,4,5 (V+),3,6,7,8 (V-) | 
| Long Distance PoE Transmission | Yes | 
| Spanning Tree Protocol | STP/RSTP | 
| VLAN Function | Port-based VLAN | 
| IEEE 802.3x Flow Control | Yes | 
| DHCP Function | DHCP Client | 
| Equipment Management | Web management | 
| General | |
| Gross Weight | 2.1 kg (4.62 lb) | 
| Packaging Dimensions | 311.5 mm × 251.5 mm × 128.5 mm (12.26" × 9.90" × 5.06") (L × W × H) | 
| Casing Material | Sheet metal | 
| Installation | Desktop mount; DIN-Rail mount | 
                                                        

        
                  
                  
                  