Product SKU: DH-CS4220-16GT-240
Product Overview
The Dahua DH-CS4220-16GT-240 is a 20-port cloud-managed Gigabit PoE switch designed for surveillance systems, offices, retail sites, hospitality venues and small-to-medium business networks. It provides sixteen 10/100/1000Mbps PoE ports, two Gigabit RJ-45 uplinks and two Gigabit SFP uplinks for flexible copper and fibre connections. Ports 1 and 2 support up to 90W each for compatible high-power equipment, while the shared PoE budget is limited to 240W across all powered ports. DoLynk Care cloud management, local web administration, LLDP topology visualisation, PoE Watchdog, loop protection and STP/RSTP support remote maintenance and network resilience. Long-distance PoE can extend supported connections to 250 metres with bandwidth reduced to 10Mbps. The sheet-metal chassis supports desktop or rack installation and includes a built-in 100-240V AC power supply. No outdoor IP rating is specified, so the switch requires a protected installation environment.
Key Capabilities
Sixteen Gigabit PoE Ports
All sixteen device ports support Gigabit Ethernet and PoE, allowing compatible cameras and network devices to receive data and power through one cable. This suits higher-resolution surveillance systems where Fast Ethernet access ports could become a bandwidth limitation.
Four Dedicated Gigabit Uplinks
Two Gigabit RJ-45 ports support conventional copper uplinks, while two Gigabit SFP ports allow compatible optical links. This provides flexibility for recorder, core-switch, server-room and longer-distance fibre connections without consuming PoE device ports.
90W High-Power PoE Ports
Ports 1 and 2 support IEEE 802.3bt and Hi-PoE with output up to 90W each. These ports suit compatible PTZ cameras and other equipment requiring more power than standard PoE or PoE+ can provide.
DoLynk Care Cloud Management
The DoLynk Care app supports remote device monitoring, status checks, fault alarms and notifications. Local web management is also available for configuration, giving installers and operators more control than an unmanaged PoE switch.
Topology and Network Protection
LLDP topology visualisation helps identify connected front-end, transmission and storage devices. STP/RSTP, loop protection and port-based VLAN functions support a more organised and resilient Layer 2 network.
PoE Watchdog and 250m Transmission
PoE Watchdog can restart a failed camera port to help recover connectivity. Long-distance mode extends supported PoE links to 250 metres, although the affected port bandwidth is reduced to 10Mbps.
Best For
- Commercial CCTV Systems: Powers and connects up to sixteen compatible IP cameras with Gigabit access ports and four uplink options.
- High-Power PTZ Deployments: Uses ports 1 and 2 for compatible equipment requiring up to 90W.
- Retail and Hospitality Sites: Supports centralised monitoring across supermarkets, restaurants, cafés and hotels.
- Offices and Factories: Provides VLAN, spanning-tree and topology functions for more structured surveillance networks.
- Fibre-Linked Installations: Uses two SFP uplinks where distance or electrical interference makes optical networking preferable.
Why Choose the DH-CS4220-16GT-240
The DH-CS4220-16GT-240 provides more management and uplink flexibility than a basic sixteen-port unmanaged PoE switch. Every powered device port supports Gigabit Ethernet, while two copper and two SFP uplinks allow the network to connect to recorders, core switches or fibre infrastructure without consuming camera ports. DoLynk Care monitoring, topology visualisation, PoE Watchdog, STP/RSTP and loop protection also make fault finding and maintenance more practical. Available through Security Wholesalers, this model is best selected after calculating the complete PoE load and confirming the uplink design. The total PoE budget is 240W, so the two 90W ports and fourteen 30W ports cannot all operate at their individual maximum output simultaneously.
Buyer Decision Tips
PoE Budget Tip: Add the maximum wattage of every connected device before ordering. Ports 1-2 support up to 90W and ports 3-16 support up to 30W, but the combined load must remain within 240W.
Fibre and Installation Tip: The SFP ports require compatible transceivers and matching fibre equipment. The switch supports desktop or rack mounting but has no specified outdoor IP rating, so direct weather exposure should be avoided.
Key Features & Technical Specifications
| Product Type |
20-port cloud-managed Layer 2 Gigabit PoE switch. |
| PoE Device Ports |
Sixteen RJ-45 10/100/1000Mbps PoE ports. |
| Copper Uplinks |
Two RJ-45 10/100/1000Mbps uplink ports. |
| Optical Uplinks |
Two 1000Mbps SFP uplink ports. |
| PoE Standards |
IEEE 802.3af, IEEE 802.3at, IEEE 802.3bt and Hi-PoE. |
| PoE Output |
Ports 1-2 up to 90W each; ports 3-16 up to 30W each. |
| Total PoE Budget |
Up to 240W across all sixteen powered ports. |
| Long-Distance PoE |
Up to 250m with affected port bandwidth reduced to 10Mbps. |
| Management |
Local web management and DoLynk Care app management. |
| Network Maintenance |
LLDP topology visualisation, PoE Watchdog, loop protection and STP/RSTP. |
| VLAN and DHCP |
Port-based VLAN with 32 VLANs and DHCP client support. |
| Switching Performance |
40Gbps switching capacity and 29.76Mpps packet forwarding rate. |
| Buffer and Jumbo Frames |
4Mbit packet buffer and 15K-byte jumbo-frame support. |
| MAC Address Table |
8K entries. |
| Flow Control |
IEEE 802.3x flow control supported. |
| Power Supply |
Built-in 100-240V AC, 47-63Hz power supply, maximum 4A. |
| Power Consumption |
Up to 8.3W when idling and 265W at full load. |
| Electrical Protection |
8kV air and 6kV contact ESD; 4kV common-mode and 2kV differential-mode lightning protection. |
| Operating Conditions |
-10°C to +55°C at 5%-95% non-condensing relative humidity. |
| Construction and Dimensions |
Sheet-metal desktop or rack-mount chassis; 440 × 220 × 44mm; net weight 2.37kg. |
Ideal Use Cases
Commercial CCTV Racks
Power up to sixteen cameras and connect the system through dedicated copper or fibre uplinks.
High-Power PTZ Systems
Use ports 1 or 2 for compatible cameras requiring up to 90W.
Retail and Hospitality Networks
Monitor cameras and network status remotely across shops, restaurants, cafés and hotels.
Factories and Offices
Use VLAN, topology and spanning-tree functions for a more organised Layer 2 deployment.
Fibre-Connected Buildings
Use compatible SFP modules where distance or electrical interference favours optical links.
Choosing the Right Model
- Choose this model if: The project needs sixteen Gigabit PoE ports, four dedicated uplinks, cloud management and a 240W budget.
- Choose a higher-budget switch if: The combined maximum PoE requirement exceeds 240W.
- Choose an unmanaged switch if: Cloud monitoring, VLANs, topology, STP/RSTP and PoE maintenance functions are unnecessary.
- Choose a weather-rated switch if: The equipment must be installed directly outdoors without a protected cabinet.
- Confirm the fibre design if: SFP module speed, fibre type, connector, wavelength or transmission distance has not been specified.
FAQs
- What is the DH-CS4220-16GT-240 designed to do?
The DH-CS4220-16GT-240 is a cloud-managed Layer 2 Gigabit PoE switch for powering and connecting up to sixteen compatible network devices. It provides sixteen Gigabit PoE ports, two Gigabit RJ-45 uplinks and two Gigabit SFP uplinks. Web and DoLynk Care app management, topology visualisation and PoE maintenance functions make it suitable for surveillance and small-to-medium business networks requiring more control than an unmanaged switch.
- How are the four uplink ports arranged?
The switch provides four dedicated uplinks. Ports 17-18 are 10/100/1000Mbps RJ-45 copper ports, while ports 19-20 are 1000Mbps SFP optical ports. The copper uplinks suit standard Ethernet cabling, and the SFP ports require compatible transceivers and fibre. The selected module, fibre type, connector, wavelength and transmission distance must match the equipment installed at both ends of the optical link.
- How is the 240W PoE budget distributed?
The total PoE budget is limited to 240W across ports 1-16. Ports 1-2 support up to 90W each, while ports 3-16 support up to 30W each. These individual limits cannot all be used simultaneously because the combined load must remain within 240W. Add the maximum power requirement of every connected camera or device before finalising the switch and network design.
- Which PoE standards and high-power devices are supported?
The DH-CS4220-16GT-240 supports IEEE 802.3af, IEEE 802.3at, IEEE 802.3bt and Dahua Hi-PoE. Ports 1-2 can supply up to 90W for compatible high-power equipment, while ports 3-16 support up to 30W each. Compatibility should still be checked against each device’s PoE standard, voltage requirements and maximum power draw before connection.
- What cloud and local management functions are available?
The switch supports local web management and cloud management through the DoLynk Care app. The platform can display device status, monitor the network in real time, issue fault alarms and send notifications. LLDP-based topology visualisation helps identify front-end, transmission and storage devices. Cloud access and notifications depend on correct account setup, internet connectivity and continued availability of the supported platform.
- What do PoE Watchdog, loop protection and STP/RSTP do?
PoE Watchdog can detect an abnormal camera connection and restart the affected PoE port to help restore service. Loop protection identifies network loops and activates an elimination mechanism to reduce broadcast-storm risk. STP and RSTP calculate a loop-free Layer 2 path while providing path redundancy. These functions improve resilience, but they still require correct network design and configuration.
- Can the switch transmit PoE over 250 metres?
Yes. Long-distance PoE transmission is supported for distances up to 250 metres, but the affected port bandwidth is reduced to 10Mbps. This mode can suit remote cameras with modest bandwidth requirements, but it is not equivalent to standard Gigabit performance. Cable quality, terminations, device power demand and site conditions should be checked before relying on the maximum distance.
- What should I confirm before ordering the DH-CS4220-16GT-240?
Confirm the number of connected devices, individual PoE requirements, total 240W budget, need for 90W ports, copper or fibre uplink design, compatible SFP modules, VLAN and spanning-tree requirements, rack space and mains power. The switch has no confirmed outdoor IP rating and should be protected from direct weather exposure. Security Wholesalers can review the proposed cameras and network layout to identify likely PoE, uplink or management limitations before installation.
Additional Information
Dahua DH-CS4220-16GT-240 Datasheet
