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XFP 10GBASE-SR Multi-mode Fibre Transceiver


  • 850nm Multi-Mode Tranceiver
  • 300m Max Distance, Duplex LC Connector

Designed to support distances up to 300 meters, the DEM-421XT is a high performance 850nm Multi-Mode XFP transceiver. Supporting Full-duplex, 10Gigabit speeds on Multi-Mode fiber cables. The DEM-421XT is 802.3ae 10GBASE-SR compliant and supports Full-duplex 802.3x Flow control. The DEM-421XT provides the necessary signal amplification for data to be transmitted to the network cable from the port, and vice versa.

The DEM-421XT is hot swappable. You can remove or replace the transceiver with the system powered on. This permits modules and transceivers to be added or swapped without interrupting network systems.



  • 10G Multi-Mode 300m XFP
  • Compliant with 802.3ae 10GBASE-SR
  • LC Port Types
  • Full Duplex 802.3x Flow Control
  • Wave Length: 850nm
  • Power Support: 3.3V / 5V


  • L = 2.8 inches (71.1mm)
  • W = .72 inches (18.35mm)
  • H =.49 inches (12.5mm)

Physical Environment    

  • Operation Temperature 0-70° C (32-158°F)
  • Storage Temperature –45-85°C (-49-185°F)
  • Humidity 0~85%
  • EMI: FCC Class B – EN 55022 Class B
  • 15kV air discharge and 8 kV contact discharge to the faceplate
  • RFI: EN 61000-4-3
  • This device also Complies with FDA 21 CFR 1040.10 and 1040.11 and IEC 825-1
  • This device meets the fire resistance requirements of Telcordia GR-63 Section 4.2.
  • Safety: fire resistance requirements of Telcordia GR-63 Section 4.2

Cabling Specifications

Product Code                   

  • 850          

Cable Type

  • MMF

Core Size (microns)

  • 62.5
  • 62.5
  • 50 .0
  • 50 .0
  • 50 .0     

Modal Bandwidth (MHz/km)

  • 160
  • 200
  • 400
  • 500
  • 2000     

Cable Distance

  • 26 meters
  • 33 meters
  • 66 meters
  • 82 meters
  • 300 meters

Emission (EMI) & Safety Certification


  • Laser Eye Safety
  • Laser Eye Safety
  • Electrical Eye Safety
  • Electrical Eye Safety


  • CDRH
  • TUV
  • TUV
  • UL

Standard Certificate

  • Safety: fire resistance requirements of Telcordia GR-63 Section 4.2.
  • Bauart cert# R72041496pg0001 for EN60950: 2000 and EN60825- 1:1994+A1+A2, CB US-TUV-R-1995;
  • 04SC04015, 0111378-30, 04SC04015
  • Class1 Laser safety:(CDRH, UL, TUV

Ordering Information


  • 10GBASE-SR Multi-mode XFP up to 300m
Description Type
Download PDF

Business Benefits

"We’re on the air and on the Internet because of D-Link switches. We’re very comfortable with the hardware, it’s been flawless."
Steven Bothwick
Director of Information Management Systems New Hampshire Public Radio

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XFP 10GBASE-SR Multi-mode Fibre Transceiver

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How to get the

Hardware revisions
Downloads can vary across product revisions.
How can I find my hardware version?
The Hardware version is located on the product information sticker on the bottom of the box and on the bottom of the product. It is marked with H/W.
Ex. H/W Ver: A1

Contact Details

D-Link Canada
2525 Meadowvale Blvd.
L5N 5S2

General: 800.354.6522
Fax: 905-828-5669