20 GbE & 4 GbE combo (SFP or RJ45) managed switch


  • High performance, managed L2 Ethernet with 20x 10/100/1000Base-T ports and 4x Gigabit Ethernet combo (10/100/1000Base-T or 1000Base-X) ports
  • Supports remote management by SNMP, HTTP(HTTPS) and Telnet(SSH) interfaces along with local management by console interface
  • Supports many L2 switch management functions, including 802.1Q VLAN, 802.1x Port Security, Rate Control, Port Configuration, Port Mirroring, Port Statistics, QoS functions, Spanning tree and more.
  • 4x Dual Speed SFP sockets, shared with TX ports of Port 21~24
  • Auto-detect TX/SFP connection
  • Port-based VLAN, 802.1Q VLAN, Voice VLAN and Q-in-Q (double tagging) function
  • Protected Port and Loop Detection function
  • IEEE 802.1x security function, and VLAN assignment, Guest VLAN functions
  • IEEE802.1D & 802.1w & 802.1s (spanning tree)
  • IP Multicast with IGMP snooping / query / fast leave / filtering /group limited /MVR
  • ACL function for L2 ~ L4 packet control, Ingress/Egress rate control on port
  • SFP Transceiver DDMI function / Dual Speed SFP Ports (100/1000Mbps)
  • IEEE 802.3az power management / FANless / Green Ethernet


Item Description
10/100/1000 Base-T


100M/1G SFP Slot

4 UTP/SFP Combo ( Port 21~24 )

Packet buffer


MAC Table size


Max Packet size

9600 Bytes

Filter & Forward rate

14880pps at 10Mbps, 148800pps at 100Mbps, 1488000pps at 1Gbps

Switching Fabric capacity


Packet Forwarding capacity


FAN Design

FAN less

Console port

D-Sub 9

19” Rack-Mount

Yes, with kits




330 x 204 x 44 mm (W x D x H)

Operating Temperature

0 ~ 50°C

Storage Temperature

-25 ~ 70°C


10% ~ 90% (non-condensing)

LED Display

Per Port : Link/Act (Green: Gigabit, Yellow:10/100M)
Per Device : Power and System

Power Consumption

18 Watt Max.

Power Input

AC Power input (100V~240V)

Port Control

Port speed, duplex mode, and flow control
Port frame size (jumbo frames), Maximum ingress frame size (9600 bytes)
Port state (administrative status)
Port status (link monitoring)
Port statistics (MIB counters)
Port VeriPHY (cable diagnostics), Power Control

Ordering Information

Order Code Description
CT-GSW-3424M1-AC 20x 10/100/1000Base-T + 4x GbE Combo with AC power supply
CT-GSW-3424M1-DC48 20x 10/100/1000Base-T + 4x GbE Combo with DC 48V power supply

More Information