Device Type: 20-Port Cloud Managed Desktop/Rack Mount Gigabit PoE Switch (Layer 2)
Model / SKU: DH-CS4220-16GT-135 (also listed as CS4220-16GT-135)
Brand: Dahua
Port Configuration:- PoE Ports: 16 × RJ-45 10/100/1000 Mbps (Ports 1–16)
- Uplink Ports: 2 × RJ-45 Gigabit (Ports 17–18); 2 × SFP Gigabit (Ports 19–20)
- Total Ports: 20 (16 PoE + 2 RJ45 Uplink + 2 SFP Uplink)
PoE Specifications:- Total PoE Budget: 135 W
- PoE Protocol: IEEE 802.3af / IEEE 802.3at / Hi-PoE / IEEE 802.3bt
- PoE Power per Port: Ports 1–2: ≤90 W (802.3bt); Ports 3–16: ≤30 W
- PoE Pin Assignment: Ports 1–2: 1,2,4,5 (V+), 3,6,7,8 (V−); Ports 3–16: 1,2 (V+), 3,6 (V−)
- PoE Management: PoE Power Consumption Management; PoE Power On/Off; Auto Power-Off on Overload Detection
- Long Distance PoE: Yes — Up to 250 m at 10 Mbps (Extend Mode, Ports 1–16, when Managed Mode is Off)
- PoE Watchdog: Yes — Monitors Ports 1–16 and auto-restarts the PoE port if no traffic for 2 minutes (when Managed Mode is Off)
Performance:- Switching Capacity: 40 Gbps
- Packet Forwarding Rate: 29.76 Mpps
- Packet Buffer Size: 4 Mbit
- Jumbo Frame: 15,360 Bytes
- MAC Table Size: 8K
- VLAN Number: 32
Management & Features:- Layer: Layer 2
- Management Type: Cloud Managed (WEB-managed + Centralized Cloud Management via DoLynk App)
- Switch Type: Smart Managed
- VLAN: Port-based VLAN
- Spanning Tree: STP / RSTP
- Link Aggregation: Yes
- DHCP: DHCP Client
- Flow Control: IEEE 802.3x
DIP Switch Modes:- Managed Mode: On by default for both local web and cloud management; Off for Unmanaged Mode
- PoE Watchdog: Auto-restarts PoE port on traffic loss
- Extend Mode: Long Distance PoE up to 250 m (when Managed Mode is Off)
Physical:- Form Factor: Desktop Mount / Rack Mount
- Dimensions (L×W×H): 440 × 228.81 × 43.65 mm (17.32" × 9.01" × 1.72")
- Net Weight: 2.4 kg (5.29 lb)
- Casing Material: Sheet Metal (Fully Enclosed, Dust-Proof)
- Power Supply: Built-in 100–240 VAC, 47–63 Hz, Max 3 A
- Power Consumption: Idling: 7.9 W; Full Load: 145.1 W
- Certifications: CE
Environmental:- Operating Temperature: –10 °C to +55 °C (+14 °F to +131 °F)
- Operating Humidity: 10%–90% (RH), Non-Condensing
- Storage Temperature: –40 °C to +75 °C (–40 °F to +167 °F)
- Storage Humidity: 5%–95% (RH), Non-Condensing
Protection:- Statics Protection: Air Discharge: 8 kV; Contact Discharge: 6 kV
- Lightning Protection: Common Mode: 6 kV; Differential Mode: 1 kV
- MTBF: 1,092,753 Hours
Key Specs: Dahua DH-CS4220-16GT-135 20-Port Cloud Managed Gigabit PoE Switch, 16× Gigabit PoE Ports (802.3af/at/bt/Hi-PoE), 2× RJ45 Uplink, 2× SFP Uplink, 135W Total PoE Budget, 40 Gbps Switching Capacity, 29.76 Mpps Forwarding Rate, Layer 2 Management, Cloud Managed via DoLynk App, VLAN/STP/RSTP/Link Aggregation, DIP Switch for Managed/Unmanaged/Watchdog/Extend Modes, Long Distance PoE up to 250m, Desktop/Rack Mount, Metal Casing, CE Certified
Usage: IP Surveillance Systems (IP Cameras, PTZ Cameras), Small to Medium Business Networks, Retail & Commercial Security Deployments, Office Networking, Wireless Access Point PoE Power, and Cloud-Managed Network Infrastructure
