Specifications
xStack® DGS-3420 Series Layer 2+ Managed Stackable Gigabit Switch Hardware Installation Reference Guide 
8 
Chapter 1   Introduction 
Switch Description  
Features 
Ports 
Front-Panel Components 
LED Indicators 
Rear Panel Components 
Side Panel Components 
Switch Description 
D-Link's DGS-3420 Series is a high performance member of the D-Link xStack® family. Ranging from 10/100/1000 Mbps 
edge switches to core gigabit switches, the xStack® switch family has been future-proof designed to provide fault 
tolerance, flexibility, port density, robust security and maximum throughput with a user-friendly management interface for 
the networking professional. 
The Series features the following list of switches: 
•  DGS-3420-28SC: Twenty SFP ports (100/1000Mbps), Four Combo Copper/SFP ports (10/100/1000Mbps and 
100/1000Mbps), Four SFP+ ports (10GE), Layer 2+ Stackable Managed Switch. 
•  DGS-3420-28TC: Twenty Copper ports (10/100/1000Mbps), Four Combo Copper/SFP ports (10/100/1000Mbps 
and 100/1000Mbps), Four SFP+ ports (10GE), Layer 2+ Stackable Managed Switch. 
•  DGS-3420-26SC: Twenty SFP ports (100/1000Mbps), Four Combo Copper/SFP ports (10/100/1000Mbps and 
100/1000Mbps), Two SFP+ ports (10GE), Layer 2+ Stackable Managed Switch. 
•  DGS-3420-28PC: Twenty Copper PoE ports (10/100/1000Mbps), Four Combo Copper/SFP ports 
(10/100/1000Mbps and 100/1000Mbps), Four SFP+ ports (10GE), Layer 2+ Stackable Managed Switch. 
•  DGS-3420-52T: Fourty-eight Copper ports (10/100/1000Mbps), Four SFP+ ports (10GE), Layer 2+ Stackable 
Managed Switch. 
•  DGS-3420-52P: Fourty-eight Copper PoE ports (10/100/1000Mbps), Four SFP+ ports (10GE), Layer 2+ 
Stackable Managed Switch. 
This cost effective Gigabit Switch provides an affordable solution for administrators to upgrade their networks to high 
speed Gigabit connections. The dedicated stacking ports offer up to 40G bi-directional bandwidth, which makes the DGS-
3420 Series also suitable as a backbone solution for SMBs. The advanced ACL and user authentication functions on the 
Switch extend the network security coverage from core to the edge. A unique D-Link Safeguard Engine protects the DGS-
3420 Series from the threat of worms and viruses, thereby increasing overall reliability, serviceability, and availability 
The Switch has a combination of 1000BASE-T ports and SFP ports that may be used in uplinking various network devices 
to the Switch, including PCs, hubs and other switches to provide a gigabit Ethernet uplink in full-duplex mode. The SFP 
(Small Form Factor Portable) combo ports are used with fiber-optical transceiver cabling in order to uplink various other 
networking devices for a gigabit link that may span great distances.  










