Dlink DEM-311GT 1-port SFP SX MM Fiber Transceiver 550m
Product Overview
The D-Link DEM-311GT (Model: DEM-311GT) is an enterprise-grade 1-port 1000BASE-SX Multi-Mode Fiber (MMF) Small Form-factor Pluggable (SFP / mini-GBIC) optical transceiver module designed for short-reach Gigabit backbones, intra-building server links, and data center connectivity. Operating over multi-mode optical fiber cabling at an 850 nm wavelength, it delivers full-duplex Gigabit data transmission speeds up to 1.25 Gbps over distances up to 550 meters (using 50/125 µm MMF) or 220 meters (using 62.5/125 µm MMF).
Built with a durable metal enclosure that minimizes Electromagnetic Interference (EMI), the D-Link DEM-311GT features a standard duplex LC optical interface, hot-pluggable architecture for seamless live-swapping without switch downtime, and complete IEEE 802.3z compliance. It integrates natively with D-Link managed and smart switches (including the DGS-1210, DGS-1250, and DGS-1510 series).
D-Link DEM-311GT Product Features
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D-Link DEM-311GT delivers 1.25 Gbps full-duplex Gigabit optical transmission performance complying with IEEE 802.3z 1000BASE-SX standards.
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D-Link DEM-311GT supports multi-mode optical fiber cabling (MMF) up to 550 meters on 50/125 µm OM2/OM3 fiber or 220 meters on 62.5/125 µm OM1 fiber.
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D-Link DEM-311GT operates at an 850 nm center wavelength with a duplex LC connector interface for optical patch cord connections.
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D-Link DEM-311GT features a hot-pluggable SFP form factor allowing effortless port installation or replacement without rebooting network switches.
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D-Link DEM-311GT is housed in an EMI-resistant metal casing that minimizes electrical interference and improves thermal dissipation.
D-Link DEM-311GT Product Condition
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D-Link DEM-311GT is sold as Brand New Sealed in original individual factory packaging with manufacturer anti-static protection intact.
Specifications
| Parameter | Technical Specification Details |
| Model / SKU | DEM-311GT |
| Transceiver Type | SFP (Small Form-factor Pluggable / Mini-GBIC) |
| Network Standard | IEEE 802.3z 1000BASE-SX |
| Media Support | Multi-Mode Fiber (MMF $50/125\,\mu\text{m}$ or $62.5/125\,\mu\text{m}$) |
| Max Transfer Speed | 1.25 Gbps Full Duplex |
| Wavelength | 850 nm |
| Max Transmission Distance | Up to 550m (50/125 µm) / Up to 220m (62.5/125 µm) |
| Connector Interface | Duplex LC Connector |
| Power Supply Voltage | 3.3V DC Operational Voltage |
| Safety Certifications | Class 1 Laser Safety (EN 60825-1, FDA 21 CFR 1040.10) |
| Enclosure Material | EMI-Resistant Metal Housing |
| Warranty Coverage | 1-Year Limited Manufacturer Hardware Warranty |
D-Link DEM-311GT Pros & Benefits
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Cost-Effective Short-Reach Fiber: Provides high-speed optical links within server closets or between floor cabinets at a lower cost than long-range single-mode modules.
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Hot-Swappable Convenience: Can be plugged into or extracted from live switch ports without interrupting overall network operations.
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Low Signal Degradation: 850 nm VCSEL laser technology ensures low noise and reliable performance across intra-building optical backbones.
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Universal D-Link Switch Integration: Fully tested and approved for D-Link smart and managed switches with SFP or SFP+ uplink ports.
D-Link DEM-311GT Variation Price Table
| Model Variant | Type / Standard | Wavelength | Fiber / Distance | Price Range (KES) |
| D-Link DEM-311GT | 1000BASE-SX SFP | 850 nm | Multi-Mode (Up to 550m) | KSh 3,200 – KSh 4,800 |
| D-Link DEM-310GT | 1000BASE-LX SFP | 1310 nm | Single-Mode (Up to 10km) | KSh 4,500 – KSh 6,500 |
| D-Link DEM-330T | 1000BASE-BX-D (BiDi SFP) | TX 1550nm / RX 1310nm | Single-Mode Single-Strand (10km) | KSh 6,500 – KSh 8,500 |
| D-Link DEM-431XT | 10GBASE-SR SFP+ | 850 nm | Multi-Mode (Up to 300m) | KSh 14,000 – KSh 18,500 |
D-Link DEM-311GT Suitable Application Areas
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Intra-Building Server Closets: Interconnects core switches and distribution switches situated on different floors within the same building.
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Data Center Rack Patching: Connects high-density server racks directly to core Gigabit switches over multi-mode optical fiber patch cords.
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Short-Distance Enterprise Backbones: Links network switches across large corporate floors or adjacent rooms without copper distance limits or electrical interference.
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Noise-Immune Industrial Links: Delivers optical data isolation in environments subject to electromagnetic interference.
User Guide & Support Manuals Link
For datasheets, switch compatibility guides, and installation documentation, visit official manufacturer resources:
Online Purchase & Countrywide Delivery:
D-Link DEM-311GT is in stock and available at Potent.it Store with fast Countrywide Delivery across Kenya, servicing Nairobi, Mombasa, Kisumu, Nakuru, Eldoret, and all major commercial centers.
D-Link DEM-311GT What is in the Box
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D-Link DEM-311GT 1-Port SFP 1000BASE-SX Transceiver Module
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Protective Rubber Optical Port Dust Cap
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Quick Installation Guide & Warranty Information
D-Link DEM-311GT Frequently Asked Questions (FAQs)
Q1: What fiber cable type is required for the D-Link DEM-311GT transceiver?
A: It requires Multi-Mode Fiber (MMF) optical cable ($50/125\,\mu\text{m}$ or $62.5/125\,\mu\text{m}$) equipped with duplex LC connectors.
Q2: How far can the D-Link DEM-311GT transmit data?
A: It supports distances up to 550 meters using $50/125\,\mu\text{m}$ multi-mode fiber (OM2/OM3) or up to 220 meters using legacy $62.5/125\,\mu\text{m}$ multi-mode fiber (OM1).
Q3: Can the D-Link DEM-311GT be hot-swapped while the switch is powered on?
A: Yes, it is hot-pluggable, allowing you to insert or remove the transceiver module without powering down the switch.
Q4: Is Countrywide Delivery available when purchasing from Potent.it Store?
A: Yes, Potent.it Store provides fast door-to-door countrywide shipping across Kenya for all D-Link transceivers, switches, patch panels, and networking accessories.
D-Link DEM-311GT Creativity Summary
The D-Link DEM-311GT provides a 1-port 1000BASE-SX Multi-Mode SFP optical transceiver module featuring 1.25 Gbps data rates, an 850 nm wavelength, duplex LC connectivity, and transmission up to 550 meters. Housed in an EMI-shielded metal enclosure with hot-pluggable architecture and IEEE 802.3z compliance, it equips network administrators, system integrators, and IT managers across Kenya with an efficient short-reach optical uplink solution for enterprise switches and local fiber networks.





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