28G + 4SFP Combo Uplink L2 Lite Gigabit Managed Switch

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Diana DMS-28G-4C is a full layer 2 Gigabit network management switch designed and developed solely for the purpose of building high-performance gigabit network requirements. With 24 Gigabit RJ45 ports, 4 Gigabit SFP (Mini GBIC) Combo ports and 4 Gigabit RJ45 uplink ports this switch provides a high-performance network with a comprehensive security protection system, reliable QoS strategy, and rich VLAN function. Management and maintenance of switch are simple and can be applied to small and medium enterprises as well as the core layer of community and schools.


  • 28*10/100/1000M RJ454* Gigabit SFPmini GBICCombo uplink ports

  • A comprehensive security protection system to ensure long-term stable operation of the network

  • Rich QoS strategy and ACL access control function, multi-service, efficient integration operation

  • Port convergence and spanning tree protocol improve the ability of link redundancy backup

  • Support secure, flexible ways of providing Web, network management, CLI command line, SNMP, etc.

  • Support network diagnosis, cable inspection, system logs, and other functions, simple maintenance


Full Gigabit access

Provides 24* 10/100/1000M adaptive RJ45 ports, all the ports have the line speed forwarding capacity; 4 independent Gigabit SFP (Mini GBIC) Combo ports and 4 Gigabit RJ45 uplink ports for convenient and flexible deployments and to fully protect user investment.

A comprehensive safety protection system

Simple operation, simplifying the management of the network; a combination of ARP attack protection function, completely solve the network ARP spoofing attacks; support port security, can limit the number of port MAC address, MAC address effective defense attack; support DoS attack protection, effectively guarantee the network security.


Multilevel access control policy

Powerful hardware ACL capacity, support L2~L4 data stream classification; easy network monitoring, traffic regulation, priority weight markers, and data forwarding control; support time-based ACL control, easy to realize the time accurate access control needs; support port and MAC 802.1x based authentication based on user access, easy setup.


Powerful VLAN capabilities

IEEE, 802.1Q, VLAN, meet the needs of different users, make the network more convenient, efficient and safe.


Reliability design

STP/RSTP/MSTP two-layer link protection technology, greatly improve the ability of fault tolerance, redundancy link, to ensure stable operation of the network; provide static convergence and dynamic aggregation of two kinds of convergence pattern, effectively increase the link bandwidth, improve link reliability, while achieving load balancing, link backup; support multicast management, through the IGMP Snooping technology, effective inhibition of multicast overload caused by network congestion.


Rich QoS strategy

3 priority modes based on port, IEEE802.1p and DSCP to guarantee the priority processing of key business data; support traffic control function, and can reasonably allocate bandwidth.


Secure network management and maintenance

CLI command line (Console, Telnet), Web network, SNMP (V1/V2c/V3, SSH (V1/V2) and other management methods, to achieve fast and convenient network management; support user identity classification, filtering and other functions, enhanced security configuration; support port data monitoring, real-time monitoring of network status, to easily achieve the global unified management of the network, convenient flexible.

Advanced watchdog Technology

System integration against a false halt system, when the system resources exhausted or the system suspended tasks and other unexpected circumstances, the system will automatically restart, to ensure the reliable operation of the network.


Product Description 28G + 4G SFP Combo Uplink L2 Fully Managed Switch
Model Name DMS-28G-4C
Product Family  
Warranty 5 Year Warranty Pack
Port Configuration  
10M/100M/1G RJ45 Port 28
100M/1G/2.5G RJ45 Port
100M/1G/10G RJ45 Port
100M/1G/2.5G/5G/10G RJ45 Port
100M/1G SFP Port
GbE RJ45/SFP Combo Port 4
1G/2.5G SFP Port
1G/10G SFP+ Port
Console Port RJ45
Total Ports 32
HW Performance  
Switching Bandwidth 56Gbps
Forwarding Performance 40.32Mpps
MAC Address 16K
Jumbo Frames 9216 Bytes
Environmental Specification  
Operating Temperature 0°C to 50°C
Operating humidity 10%~90% Non condensing
Storage Temperature -40℃~70℃
Storage humidity 5%~95% Non condensing
Mechanical Specification  
Product size 440(L)*200(W)*45(H)mm
Packing size 497(L)*313(W)*97(H)mm
Weight 2.6 Kg
FAN Less Y
Power Source  
AC Input AC 100~240V 50~60Hz
DC Input
Dual Input
Total PoE Budget
Max PoE Power Per Port
PoE Standard
EN60950 (Surge 3KV, 8/20us) Y
Certifications CE/LVD/FCC Class B
L2 Switching  
IEEE 802.3x Y
IEEE 802.3、IEEE 802.3u、IEEE 802.3ab、IEEE 802.3z Y
IEEE 802.3ad Y
IEEE 802.3q 、IEEE 802.3q/p Y
IEEE 802.1w、IEEE 802.1d 、EEE 802.1S Y
MAC Address 16K
MAC address learning and aging Y
Port-based VLANs Y
802.1Q VLAN Y
Spanning Tree  
STP(Spanning Tree Protocol) Y
RSTP/MSTP(Rapid Spanning Tree Protocol) Y
ERPS ring network protocol Y
EAPS ring network protocol Y
802.1x argumentation agreement Y
Link Aggregation Max 8 aggregation groups, each supports 8 ports
Static aggregation Y
Dynamic aggregation Y
Port Mirror Y (Many-to-one)
Loop Guard  
Loop protection function Y
Real-time detection Y
Rapid alarm Y
Accurate positioning Y
Intelligent blocking Y
Automatic recovery Y
Port isolation Y
Port flow control  
Half-duplex based back pressure control Y
Full-duplex based on PAUSE frames Y
Port-based input/output bandwidth management Y
IGMP Snooping  
IGMPv1/2/3 MLDv1/2 Snooping Y
GMRP protocol registration Y
Multicast address management Y
Multicast VLAN Y
Multicast routing ports Y
Static multicast addresses Y
DHCP Snooping Y
Storm suppression  
Unknown unicast, multicast Y
Unknown multicast Y
Storm suppression of broadcast type Y
Storm suppression based on bandwidth tuning Y
Storm filtering Y
User port+IP address+MAC Y
ACL based on IP and MAC Y
Security properties of port-based MAC address quantities Y
802.1p port queue priority algorithm Y
Cos/Tos,QOS sign Y
WRR (Weighted Round Robin) Y
Weighted priority rotation algorithm Y
WRR、SP、WFQ,3 priority scheduling models Y
DSCP classification Y
Port Auto-MDIX; Auto-negotiation
System maintenance  
Upgrade package upload Y
System log view Y
Web restore and factory configuration restore Y
Management and maintenance  
WEB Interface Y
Remote configuration and maintenance using Telnet Y
CLI Telnet Y

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