D-Link 1000Base-SX Gigabit Multi-Mode Fiber SFP Transceiver

The D-Link DEM-311GT is a Small Form Factor Pluggable transceiver that gives any switch or router with an open SFP slot a fast, fiber-based Gigabit Ethernet uplink. Built for the 1000Base-SX standard, it delivers a full 1 Gbps in each direction over multi-mode fiber, so you can move large files, back up servers, or stream high-bandwidth applications without congestion.

This module uses an LC connector and supports distances up to 220 meters on 62.5 micron fiber or up to 550 meters on 50 micron fiber. A metal housing shields the optics from electromagnetic interference and adds physical durability, while full-duplex operation keeps data flowing smoothly in both directions.

Because the DEM-311GT is hot-pluggable, network administrators can add or replace it without shutting down equipment. That convenience is ideal for environments that demand continuous uptime, such as campus networks, small business server rooms, and branch offices that need a simple way to extend fiber links between closets or racks.

D-Link backs the transceiver with a two-year warranty and free technical support, giving you extra confidence when upgrading or expanding your fiber infrastructure.

• 1000Base-SX SFP transceiver for Gigabit Ethernet
• Sustains 1 Gbps full-duplex over multi-mode fiber
• Supports up to 550 m on 50 micron fiber and 220 m on 62.5 micron fiber
• LC fiber connector for simple, widely compatible cabling
• Hot-pluggable design allows installation without downtime
• Metal housing helps reduce electromagnetic interference
• Includes two-year warranty and access to D-Link technical support