D-Link DGS-3120-48TC – 48-Port Gigabit xStack Layer 2 Managed Stackable Switch with 4 Combo SFP Ports & 40G Stacking
Overview:
• The D-Link DGS-3120-48TC is an xStack Layer 2 Managed Stackable Gigabit Switch designed for SMB, enterprise, campus, Metro Ethernet, triple-play, CCTV/IP surveillance backbone, and professional access layer deployments.
• It provides 44 × 10/100/1000BASE-T Gigabit RJ45 ports and 4 × combo 10/100/1000BASE-T/SFP Gigabit ports for flexible copper and fiber uplink connectivity.
• The switch includes 2 × 10G CX4 stacking ports, supporting physical stacking up to 6 units and up to 40Gbps stacking bandwidth.
• It supports virtual stacking up to 32 units using D-Link Single IP Management, allowing centralized management of multiple switches through one IP address.
• The DGS-3120-48TC supports Standard Image and Enhanced Image software options, including advanced QoS, traffic shaping, L2 multicast, VLAN, ACL, security, OAM, IPv6 management, ERPS, Static Route, IMPB, sFlow, and Q-in-Q features.
• It delivers 136Gbps switching capacity, 101.19Mpps packet forwarding rate, 2MB packet buffer memory, 32MB flash memory, and jumbo frame support up to 13K bytes.
Key Features:
• 48-Port Gigabit Layer 2 Managed Stackable Switch
• 44 × 10/100/1000BASE-T Gigabit RJ45 Ports
• 4 × Combo 10/100/1000BASE-T/SFP Ports
• 2 × 10G CX4 Stacking Ports
• 136Gbps Switching Capacity
• 101.19Mpps Packet Forwarding Rate
• 2MB Packet Buffer Memory
• 32MB Flash Memory
• Jumbo Frame up to 13K Bytes
• Physical Stacking up to 6 Units
• Up to 40Gbps Full-Duplex Stacking Bandwidth
• Virtual Stacking up to 32 Units
• D-Link Single IP Management
• Optional Redundant Power Supply Support via DPS-500
• RJ-45 Console Port
• SD Card Slot
• STP, RSTP, MSTP, BPDU Filtering, and Root Restriction
• 802.3ad Link Aggregation
• IGMP Snooping and MLD Snooping
• VLAN, 802.1Q, GVRP, Voice VLAN, MAC-Based VLAN, ISM VLAN, Private VLAN, and VLAN Trunking
• Advanced QoS with 8 Queues per Port
• ACL with up to 1.5K Ingress Access Rules
• SSH v2, SSL, Port Security, Storm Control, and D-Link Safeguard Engine
• 802.1X, Web-Based Access Control, MAC-Based Access Control, Guest VLAN, RADIUS, TACACS, and Microsoft NAP
• D-Link Green Power Saving by Link Status and Cable Length
• Web GUI, CLI, Telnet, SNMP, RMON, LLDP, DHCP Relay, Multiple Images, and Multiple Configurations
• Enhanced Image Support for ERPS, Q-in-Q, Static Route, IMPB, OAM, IPv6 Management, and sFlow
• IPv6 Ready Logo Phase 2
• 19-Inch Rack-Mount, 1U Design
• 2 Smart Fans
Technical Specifications:
• Product Type: Gigabit Layer 2 Managed Stackable Switch
• Brand: D-Link
• Model: DGS-3120-48TC
• Series: DGS-3120 Series
• Port Configuration: 44 × 10/100/1000BASE-T + 4 × Combo 10/100/1000BASE-T/SFP + 2 × 10G CX4
• Gigabit RJ45 Ports: 44 Ports
• Combo RJ45/SFP Ports: 4 Ports
• 10G CX4 Stacking Ports: 2 Ports
• PoE Support: Not Supported
• Optional Redundant Power Supply: DPS-500
• Console Port: RJ-45
• Stacking Ports: 2
• SD Card Slot: 1
• Switching Capacity: 136Gbps
• 64-Byte Packet Forwarding Rate: 101.19Mpps
• Packet Buffer Memory: 2MB
• Flash Memory: 32MB
• Jumbo Frame: Up to 13K Bytes
• MTBF: 292,201 Hours
• Acoustic Level: Max 45.2dB / Min 35.7dB
• Heat Dissipation: 228.8BTU/hr
• Power Input: 100 to 240V AC, 50 to 60Hz Internal Universal Power Supply
• Maximum Power Consumption: 67.1W
• Dimensions: 440 × 310 × 44mm
• Weight: 4.615kg
• Ventilation: 2 Smart Fans, High Speed above 40°C, Low Speed below 35°C
• Operating Temperature: 0°C to 50°C
• Storage Temperature: -40°C to 70°C
• Operating Humidity: 10% to 90% RH
• Storage Humidity: 5% to 90% RH
• EMI Standards: FCC Class A, CE Class A, VCCI Class A, IC, C-Tick
• Safety Standards: CB, cUL, LVD
• Certification: IPv6 Ready Logo Phase 2
• Stackability: Physical Stacking up to 6 Units, Virtual Stacking up to 32 Units, up to 40Gbps Stacking Bandwidth
• Layer 2 Features: 16K MAC Address Table, 802.3x Flow Control, HOL Blocking Prevention, Jumbo Frame up to 13K Bytes, STP, RSTP, MSTP, BPDU Filtering, Root Restriction, Loopback Detection, 802.3ad Link Aggregation, Port Mirroring, Flow-Based Mirroring, and RSPAN Mirroring
• Link Aggregation: Up to 32 Groups per Device, 8 Gigabit Ports per Group
• L2 Multicasting: IGMP Snooping v1/v2/v3, 1024 IGMP Groups, Host-Based IGMP Snooping Fast Leave, IGMP Snooping Querier, Limited IP Multicast, IGMP Filtering Profiles, MLD Snooping v1/v2, 1024 MLD Groups, MLD Snooping Querier, and Host-Based MLD Snooping Fast Leave
• VLAN Features: Up to 4K VLAN Groups, GVRP, up to 255 Dynamic VLAN Groups, 802.1Q Tagged VLAN, Port-Based VLAN, 802.1v Protocol VLAN, Voice VLAN, MAC-Based VLAN, ISM VLAN, Asymmetric VLAN, Private VLAN, and VLAN Trunking
• QoS Features: 802.1p, 8 Queues per Port, Strict Priority, WRR, Strict + WRR, CoS Based on Switch Port, VLAN ID, 802.1p Priority, MAC Address, IPv4 Address, DSCP, Protocol Type, TCP/UDP Port, User-Defined Packet Content, IPv6 Address, IPv6 Traffic Class, IPv6 Flow Label, Remarking, and Bandwidth Control
• Bandwidth Control: Port-Based and Flow-Based Ingress/Egress Bandwidth Control with 64Kbps Minimum Granularity
• ACL Features: Up to 1.5K Ingress Access Rules, ACL Based on 802.1p Priority, VLAN ID, MAC Address, EtherType, IPv4 Address, DSCP, Protocol Type, TCP/UDP Port Number, User-Defined Packet Content, IPv6 Address, IPv6 Flow Label, IPv6 Traffic Class, Time-Based ACL, and CPU Interface Filtering
• Security Features: SSH v2, SSL v1/v2/v3, Port Security up to 64 MAC Addresses per Port/VLAN, Broadcast/Multicast/Unicast Storm Control, Traffic Segmentation, D-Link Safeguard Engine, NetBIOS/NetBEUI Filtering, DHCP Server Screening, ARP Spoofing Prevention, and BPDU Attack Protection
• AAA Features: 802.1X Port-Based Access Control, Host-Based Access Control, Identity-Driven Policy Assignment, Authentication Database Failover, Web-Based Access Control, MAC-Based Access Control, Japan Web-Based Access Control, Guest VLAN, Microsoft NAP, RADIUS Accounting, RADIUS and TACACS Authentication, and 4-Level User Account
• Green Features: RoHS Compliance, Power Saving by Link Status, and Power Saving by Cable Length
• OAM Features: Cable Diagnostics, 802.3ah Ethernet Link OAM, D-Link Unidirectional Link Detection, 802.1ag Connectivity Fault Management, and ITU-T Y.1731 with Enhanced Image
• Management Features: Web GUI IPv4, CLI, Telnet Server/Client IPv4, SSH Server, TFTP Client, ZModem, SNMP v1/v2c/v3, SNMP Traps, System Log, RMON v1/v2, LLDP, BootP/DHCP Client, DHCP Auto-Configuration, DHCP Relay Option 12/82, Flash File System, Multiple Images, Multiple Configurations, CPU Monitoring, Debug Command, SNTP, Password Recovery, Password Encryption, Trusted Host, and Microsoft NLB Support
• Enhanced Image Features: ERPS, Double VLAN Q-in-Q, Static Route, up to 16 IP Interfaces, ARP Proxy, IPv6 Neighbor Discovery, IP-MAC-Port Binding, ARP Packet Inspection, IP Packet Inspection, DHCP Snooping, IPv6 ND Snooping, Compound Authentication, Ethernet OAM, SNMP over IPv6, Web GUI IPv6, Telnet IPv6, TFTP IPv6, ICMPv6, sFlow, and PPPoE Circuit ID
• Optional Management Software: D-View Network Management Software
• Optional Stacking Cables: 50cm and 100cm Stacking Cables
• Optional RPS: DPS-500 / DPS-500DC
• Optional SFP Transceivers: 1000BASE-LX, 1000BASE-SX, 1000BASE-LHX, 1000BASE-ZX, 100BASE-FX
• Optional WDM SFP Transceivers: 1000BASE-BX and 100BASE-BX WDM SFP Transceivers
• Ordering Options: DGS-3120-48TC/SI and DGS-3120-48TC/EI
Applications:
• SMB and enterprise access networks
• Campus network access layer
• Metro Ethernet access networks
• CCTV and IP surveillance backbone networks
• VoIP and IPTV networks
• Triple-play services for voice, video, and data
• Distribution cabinets and network racks
• High-density managed Gigabit access deployments
• Networks requiring physical stacking and centralized management
• Networks requiring VLAN, QoS, ACL, IPv6 management, OAM, and secure authentication
Connect Gates Recommendation:
• Connect Gates recommends the D-Link DGS-3120-48TC for projects that require high-density Gigabit Layer 2 managed switching with stacking capability and flexible SFP uplinks.
• It is a strong choice for enterprise, campus, SMB, CCTV backbone, Metro Ethernet, and triple-play networks where 48-port Gigabit access and reliable centralized management are required.
• The 44 Gigabit RJ45 ports, 4 combo SFP ports, 2 dedicated 10G CX4 stacking ports, 136Gbps switching capacity, 40Gbps stacking bandwidth, VLAN, QoS, ACL, OAM, IPv6 support, and D-Link Single IP Management make it suitable for professional managed network deployments.
• For best performance, Connect Gates recommends reserving the combo SFP ports for fiber uplinks or inter-cabinet connections and using the dedicated stacking ports when building scalable access-layer stacks.