• 24 x 10/100/1000BASE-T ports
  • 4 x 10G SFP+ ports
  • Lite L3 Static Routing
  • Advanced security features, IMPB, 802.1X Authentication
  • Dual Image & Configuration
  • Supports STP/RSTP/MSTP
  • Full CLI
  • QoS Enablement
  • 11 Web Languages

Specification

Model Information

  • Model Number: DGS-1250-28X
  • Hardware Version: A1

General

  • Interfaces:
    • 24 x 10/100/1000BASE-T ports
    • 4 x 10G SFP+ ports

Port Standards & Functions

  • Supported Standards:
    • IEEE 802.3: 10BASE-T Ethernet (twisted-pair copper)
    • IEEE 802.3u: 100BASE-TX Fast Ethernet (twisted-pair copper)
    • IEEE 802.3u: 100BASE-FX 100 Mbps over fiber optic
    • IEEE 802.3ab: 1000BASE-T Gigabit Ethernet (twisted-pair copper)
    • IEEE 802.3z: 1000BASE-X 1 Gbps over fiber optic
    • IEEE 802.3az: Energy-Efficient Ethernet (EEE)
    • IEEE 802.3x: Flow Control
    • IEEE 802.3ae: 10 Gigabit Ethernet
    • IEEE 802.3af/at: Power over Ethernet (PoE)
  • Network Cables: UTP Cat. 5, Cat. 5e (maximum distance: 100 m)

Duplex Mode

  • 10/100 Mbps: Full/Half-duplex
  • 1000 Mbps: Full-duplex only

Media Interface Exchange

  • Auto MDI/MDIX: Automatic adjustment for all twisted-pair ports

Performance

  • Switching Capacity: 128 Gbps
  • Transmission Method: Store-and-forward
  • MAC Address Table: 16K entries
  • Static MAC Addresses: 256 entries
  • Maximum Forwarding Rate: 95.24 Mpps (million packets per second)
  • Packet Buffer Memory: 12 Mbits
  • CPU Memory: 2 GB DDR3
  • Flash Memory: 64 MB

Power

  • Power Input: 100 to 240 V AC, 50/60 Hz (internal universal power supply)
  • Maximum Power Consumption:
    • 30.6 W at 100 V
    • 29.6 W at 240 V
  • Standby Power Consumption:
    • 8.7 W at 100 V
    • 9.3 W at 240 V

Acoustics

  • Maximum Noise Level: 47.6 dB(A)
  • Minimum Noise Level: 33.2 dB(A)
  • Heat Dissipation:
    • 104.346 BTU/hr (100 V)
    • 100.936 BTU/hr (240 V)

Environmental Specifications

  • Operating Temperature: -5 to 50 °C (23 to 122 °F)
  • Storage Temperature: -20 to 70 °C (-4 to 158 °F)
  • Operating Humidity: 0% to 95% relative humidity
  • Storage Humidity: 0% to 95% relative humidity

Dimensions

  • Size: 440 mm x 140 mm x 44 mm (17.32 x 5.51 x 1.73 in)
  • Weight: 1.75 kg (3.86 lbs)

Safety & EMI Certifications

  • Safety Certifications: CB, UL, BSMI, CCC
  • EMI Certifications: CE Class A, VCCI Class A, FCC Class A, IC, BSMI

Software Features (Layer 2)

  • L2 Features:
    • MAC Address Table: 16K entries (32K for DGS-1250-52X/52XMP)
    • IGMP Snooping: v1/v2/v3 with support for 256 IGMP groups
    • Static Multicast Addresses: Supports at least 64
    • IGMP per VLAN and IGMP Snooping Querier
    • Loopback Detection
    • 802.3ad Link Aggregation: Up to 8 groups per device and 8 ports per group
    • LLDP and LLDP-MED support
    • Jumbo Frame Support: Up to 12,000 bytes
    • Spanning Tree Protocol: 802.1D STP, 802.1W RSTP, 802.1s MSTP
    • Flow Control: 802.3x Flow Control with HOL Blocking Prevention
    • Port Mirroring: One-to-One, Many-to-One, with Tx/Rx/Both options
    • Multicast Filtering: Forwards registered groups, filters unregistered
    • Configurable MDI/MDIX
    • MLD Snooping v1/v2 awareness (256 groups)
    • PD-Alive