20G SFP + 4G Combo Full SFP Gigabit L2+ Managed Switch with NMS

DMS-20F-4C L2+ Managed Switch is a next-generation Fiber Switch offering full suite of L2 features including advanced L3 features such as Static Route that delivers the better cost performance and lower total cost of ownership in Enterprise networks or backbone via fiber or copper connections.

DMS-20F-4C delivers 20 GbE SFP ports, 4 Combo GbE RJ45/SFP ports and DB9 Console port with built-in AC and DC dual power supply. DMS-20F-4C provides front access to all data and management ports, and a compact form factor that facilitates desktop, wall-mount, or rack-mount installations.

DMS-20F-4C is ideal to deliver management simplicity, better user experience, and lowest total cost of ownership. The free embedded Device Managed System is designed to be extremely easy-to-use/manage/install IP Phone, IP Cam, or Wifi-AP for Enterprise Applications.

Key Features

  • L2+ Managed features provide easier manageability, robust security and QoS.
  • Built in Device Management System (DMS)
  • AC/DC Dual Power Supply
  • DHCP Server
  • IPv4/IPv6 L3 static route
  • IEEE 802.3az EEE Energy Efficient Ethernet standard for green Ethernet application

Feature-rich Ethernet Switch for Enterprise-class

The switch delivers advanced functionality in L2+ managed switch including Layer 3 static route, DHCP server, IPv6 support, LLDP, etc. It also has comprehensive security features such as IP source guard, Access Control List guard your network from unauthorized access.

It helps users to build on the market-leading price/performance with L2+ Managed GbE fiber switch, and provide secure, reliable and ease of use for enterprise and SMB deployments.

Easy to Install, Configure and Troubleshoot by Device Management System

The DMS provides embedded functions to facilitate devices management at anytime and anywhere. Its user-friendly interface helps users to manage devices intuitively.

Layer 2 Switching
Spanning Tree Protocol (STP) Standard Spanning Tree 802.1d Rapid Spanning Tree (RSTP) 802.1w Multiple Spanning Tree (MSTP) 802.1s
Trunking Link Aggregation Control Protocol (LACP) IEEE 802.3ad
Up to 26 groups Up to 4 ports per group
VLAN Supports up to 4K VLANs simultaneously (out of 4096 VLAN IDs)
Port-based VLAN 802.1Q tag-based VLAN MAC-based VLAN Management VLAN Private VLAN Edge (PVE) Q-in-Q (double tag) VLAN Voice VLAN GARP VLAN Registration Protocol (GVRP)
DHCP Relay Relay of DHCP traffic to DHCP server in different VLAN. Works with DHCP Option 82
IGMP v1/v2/v3 Snooping IGMP limits bandwidth-intensive multicast traffic to only the requesters. Supports 1024 multicast groups
IGMP Querier IGMP querier is used to support a Layer 2 multicast domain of snooping switches in the absence of a multicast router
IGMP Proxy IGMP snooping with proxy reporting or report suppression actively filters IGMP packets in order to reduce load on the multicast router
MLD v1/v2 Snooping Delivers IPv6 multicast packets only to the required receivers
Device Management System (DMS)
Graphical Monitoring Topology view: Support intuitive way to configure and manage switches and devices with visual relations Floor view: It's easy to drag and drop PoE devices and help you to build smart workforces Map view: Enhance efficiency to drag and drop devices and monitor surroundings on google map
Find my Switch Search your real switches quickly and manage directly.
Traffic Monitoring Display visual chart of network traffic of all devices and monitor every port at any time from switches
Trouble Shooting Network diagnostic between master switch and devices Support protection mechanism, such as rate-limiting to protect your devices from brute-force downloading
Layer 3 Switching
IPv4 Static Routing IPv4 Unicast: Static routing
IPv6 Static Routing IPv6 Unicast: Static routing
Secure Shell (SSH) SSH secures Telnet traffic in or out of the switch, SSH v1 and v2 are supported
Secure Sockets Layer (SSL) SSL encrypts the http traffic, allowing advanced secure access to the browser-based management GUI in the switch
IEEE 802.1X IEEE802.1X: RADIUS authentication, authorization and accounting, MD5 hash, guest VLAN, single/multiple host mode and single/multiple sessions Supports IGMP-RADIUS based 802.1X Dynamic VLAN assignment
Layer 2 Isolation Private VLAN Edge PVE (also known as protected ports) provides L2 isolation between clients in the same VLAN. Supports multiple uplinks
Port Security Locks MAC addresses to ports, and limits the number of learned MAC address
IP Source Guard Prevents illegal IP address from accessing to specific port in the switch
RADIUS/ TACACS+ Supports RADIUS and TACACS+ authentication. Switch as a client
Storm Control Prevents traffic on a LAN from being disrupted by a broadcast, multicast, or unicast storm on a port
DHCP Snooping A feature acts as a firewall between untrusted hosts and trusted DHCP servers
ACLs Supports up to 512 entries. Drop or rate limitation based on: Source and destination MAC, VLAN ID or IP address, protocol, port, Differentiated services code point (DSCP) / IP precedence TCP/ UDP source and destination ports 802.1p priority Ethernet type Internet Control Message Protocol (ICMP) packets TCP flag
Quality of Service
Hardware Queue Supports 8 hardware queues
Scheduling Strict priority and weighted round-robin (WRR) Queue assignment based on DSCP and class of service
Classification Port based 802.1p VLAN priority based IPv4/IPv6 precedence / DSCP based Differentiated Services (DiffServ) Classification and re-marking ACLs
Rate Limiting Ingress policer Egress shaping and rate control Per port
DHCP Server Support DHCP server to assign IP to DHCP clients
Zero Touch Upgrade Upgrade single switch automatically when you get notification
Remote Monitoring (RMON) Embedded RMON agent supports RMON groups 1,2,3,9 (history, statistics, alarms, and events) for enhanced traffic management, monitoring and analysis
Port Mirroring Traffic on a port can be mirrored to another port for analysis with a network analyzer or RMON probe. Up to N-1 (N is Switch's Ports) ports can be mirrored to single destination port. A single session is supported.
UPnP The Universal Plug and Play Forum, an industry group of companies working to enable device-to-device interoperability by promoting Universal Plug and Play
s-Flow The industry standard for monitoring high speed switched networks. It gives complete visibility into the use of networks enabling performance optimization, accounting/billing for usage, and defense against security threats
IEEE 802.1ab (LLDP) Used by network devices for advertising their identities, capabilities, and neighbors on an IEEE 802ab local area network Support LLDP-MED extensions
Web GUI Interface Built-in switch configuration utility for browser-based device configuration
CLI For users to configure/manage switches in command line modes
Dual Image Independent primary and secondary images for backup while upgrading
SNMP SNMP version1, 2c and 3 with support for traps, and SNMP version 3 user-based security model (USM)
Firmware Upgrade Web browser upgrade (HTTP/ HTTPs) and TFTP Upgrade through console port as well
NTP Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched
Other Management HTTP/HTTPs; SSH DHCP Client/ DHCPv6 Client Cable Diagnostics Ping Syslog Telnet Client IPv6 Management
Product Discription 20 + 4 Full SFP Gigabit L2+ Managed Switch
Model Name DMS-20F-4C
Product Family Diana
Warranty 5 Year Warranty Pack
Port Configuration
10M/100M/1G RJ45 Port --
100M/1G/2.5G RJ45 Port --
100M/1G/10G RJ45 Port --
100M/1G/2.5G/5G/10G RJ45 Port --
100M/1G SFP Port 20
GbE RJ45/SFP Combo Port 4
1G/2.5G SFP Port --
1G/10G SFP+ Port --
Console Port DB9
Total Ports 24
HW Performance
Switching Bandwidth 48Gbps
Forwarding Performance 35.7Mpps
MAC Address 32K
Jumbo Frames 10056 Bytes
Environmental Specification
Operating Temperature -20°C to 60°C
Operating Humidity 5 to 90% RH
Storage Temperature -25°C to 70°C
Storage Humidity 5 to 90% RH
Mechanical Specification
Dimensions (H) x (W) x (D) mm 44 x 442 x 211
Weight 3.1 Kg
FAN Less --
Power Source
AC Input 100V-240V
DC Input 24V ~ 48V DC
Dual Input AC/DC
Certifications CE/FCC Class A Others by Request
EN61000-4-5 (for RJ45 Port, Surge 6KV) --
L2 Switching
Spanning Tree --
IEEE802.1D (STP) Y
802.1Q VLAN Y
Port-Based Y
VLAN Entries 4K
Private VLAN Y
Voice VLAN Y
Guest VLAN Y
Q-in-Q Y
802.1v Protocol VLAN Y
IP Subnet-Based VLAN Y
Dynamic Trunk Y
Static Trunk Y
IGMP Snooping Y
MLD Snooping Y
Multicast VLAN Registration (MVR) Y
L3 Features
Static Route Y
DHCP Server Y
QoS Features
Class of Service Y
Port Based Y
802.1p Y
Rate Limiting Y
Ingress Y
Egress Y
Priority Queue Scheduling Y
Stri Priority Y
Hardware Queues 8
L2/L3/L4 Y
IPv6 Support Y
Port Security (MAC-based) Y
IP Source Guard Y
Storm Control Y
RADIUS Authentication 802.1x Y
TACACS+ Authentication Y
HTTPs and SSL (Secured Web) Y
BPDU Guard Y
STP Root Guard Y
DHCP Snooping Y
Loop Protection Y
Client Y
Relay Y
Option 66 Y
Option 67 Y
Option 82 Y
Event/Error Log Y
Syslog Y
Management Access Filtering Y
Web UI Y
Telnet Y
PoE Management
Scheduling --
Auto-Checking --
Power Delay --
SNMP (v1, v2c, v3) Y
RMON (1,2,3 & 9 Groups) Y
Software Upgrade Y
Configuration Export/Import Y
Port Mirroring Y
CDP Aware Y
sFlow Y
IPv6 Management Y
Device Management System
Device Management Y
Topology View Y
Floor View Y
Map View Y
Dashboard Y
Traffic Monitoring Y
Cable Diagnostics Y
Switch2go Y
iOS Devices Y
Android Devices Y
Find my Switch Y
Tech Support Online Y
Power Backup with Battery Charge Option(12~15V)
OOB MGMT Port --
DC Power Socket --
*All specifications are subject to change without notice.
*All specifications are subject to change without notice.