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DEM-311GT
D-Link Gigabit SFP optical module, multi-mode, 550 meters, w...
Federal agencies and Fortune 500 operations source through ORM Systems.
US Government & Defense
Enterprise Clients
Regional teams and 25+ distribution partners keep stock near you and accountability in your time zone.
Pay by PayPal or Revolut with full chargeback rights. Order on PO terms, Net-30 for government.
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Ten years serving buyers who audit their vendors. From federal agencies to 20,000+ enterprise clients worldwide.
DEM-311GT is a high-performance SFP+ transceiver engineered for 10G applications. This module comes with an LC connector and supports long-range transmission over single-mode fiber up to 10 km, making it a reliable solution for data centers, enterprise networks, and telecom infrastructures while accommodating Ethernet and Fibre Channel protocols.
Designed with a compact form factor, the DEM-311GT measures approximately 0.7 inches in height, 1.0 inch in width, and 1.5 inches in depth. Its efficient 3.5W power consumption and broad compatibility with industry leaders such as Cisco, Juniper, Huawei, and Arista underscore its ideal integration into modern, high-density network environments.
DEM-311GT price is is available on request. Get immediate quote.
Request bulk order quote for DEM-311GT for additional pricing. Browse the full D-Link Transceivers series or explore all D-Link products.
Scenario: Link top-of-rack switches in a data center over OM3 multimode fiber spans up to 550 m using the DEM-311GT-D-Link Gigabit SFP (850 nm, LC connector). Benefit: Delivers reliable 1 Gbps throughput, low insertion loss, hot-swappable flexibility and standardized compatibility to maximize uptime and streamline rack-to-rack networking.
Scenario: Upgrade a university’s campus network backbone by deploying DEM-311GT-D-Link Gigabit SFP modules to connect building distribution switches over 550 m of multimode fiber at 850 nm with LC connectors. Benefit: Achieves consistent gigabit-speed uplinks, cost-effective fiber reuse and simplified maintenance, boosting network resilience and supporting high-bandwidth research applications.
Scenario: Extend the video surveillance storage network in a corporate campus by installing DEM-311GT-D-Link Gigabit SFP modules on NVRs and core switches across 550 m of multi-mode fiber (850 nm, LC). Benefit: Guarantees stable 1 Gbps video streams, reduces packet loss for high-resolution cameras, and enables plug-and-play installation for secure, uninterrupted recording.
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| DEM-311GT |  DFE-850 |  DFE-852 |  DEM-431XT |  DFE-851 | |
|---|---|---|---|---|---|
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Form Factor | SFP+ | SFP | QSFP | XFP | SFP |
| Data Rate | 10G | 10G | 100G | 10G | 10G |
| Connector Type | LC | LC | LC | LC | LC |
| Wavelength | 1310nm | 1310 nm | 850nm | 1310 nm | 1310 nm |
| Transmission Distance | Long-Range | Long-Range | Short-Range | Long-Range | Short-Range |
| Fiber Type | Single-mode | Single-mode | Multi-mode | Single-mode | Single-mode |
| Max Distance | 10 km | 80 km | 100 meters | 80 km | 10 km |
| Supported Protocols | Ethernet, Fibre Channel | Ethernet, Fibre Channel | Ethernet, Fibre Channel | Ethernet, Fibre Channel | Ethernet |
| Network Interface | Fiber | Fiber | Fiber | Fiber | Fiber |
| Operating Temperature | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C | 0 to 70°C |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista |
| Product Name | DEM-311GT | DFE-850 Optical Transceiver Module | DFE-852 QSFP Transceiver Module | DEM-431XT 10G XFP Optical Transceiver | DFE-851 10G SFP Transceiver |
| Height | 0.7 inches | 0.13 inches | 0.5 inches | 0.6 inches | 0.7 inches |
| Width | 1.0 inches | 0.59 inches | 1.0 inches | 1.2 inches | 0.5 inches |
| Depth | 1.5 inches | 0.34 inches | 1.0 inches | 1.8 inches | 0.9 inches |
| Weight | 0.05 lbs | 0.04 lbs | 0.05 lbs | 0.15 lbs | 0.1 lbs |
Every unit is authentic, sourced through trusted and authorised channels, and serial-verified on request. Genuine networking and IT hardware, guaranteed, or your money back.
New products are backed by up to 3 years of extended warranty, and certified refurbished units by up to 3 months, for dependable protection on every order. Coverage is clear, honoured in full, and confirmed on each product page.
If a unit ever falls short, our streamlined RMA process gets a replacement to you fast, with advance replacement available to keep your network running. No jargon, no runaround.
Every device is inspected, bench-tested, and firmware-verified, with configurations wiped before dispatch. Additional testing can be arranged to confirm full working condition on request.
Our specialists assist with compatibility, configuration, licensing, and installation, before and after you buy. Real hardware expertise, whenever you need it.
dispatched quickly and shipped worldwide from regional hubs, fully tracked and insured.
Multimode SFP module performs consistently for short range links.
Installed smoothly and signal is stable.
Good optical module for campus use.
Works well with D-Link switches.
Dependable gigabit SFP.
The DEM-311GT is a hot-pluggable D-Link Gigabit SFP optical transceiver supporting multi-mode fiber at 850 nm wavelength for up to 550 m reach over LC duplex connectors.
The DEM-311GT supports 1 Gbps full-duplex data transmission, making it ideal for high-speed Ethernet applications.
This SFP module is designed for multi-mode fiber (MMF) cabling, supporting OM1/OM2/OM3 standards for optimal performance.
The DEM-311GT delivers reliable connectivity up to 550 meters over multi-mode fiber at standard conditions.
It uses a standard LC duplex connector for secure, low-loss fiber connections in rack-mounted switches and patch panels.
The module operates at an 850 nm wavelength, optimized for short-reach multi-mode fiber networks.
Yes, the DEM-311GT supports hot-swapping, allowing you to install or remove it without powering down the host device.
The DEM-311GT is compatible with D-Link Gigabit switches and routers that feature an SFP port, including the DGS and DES series.
Yes, it includes DDM (also known as DOM) support for real-time monitoring of optical output power, temperature, and voltage.
The DEM-311GT operates reliably between 0 °C and 70 °C (32 °F–158 °F) for standard commercial deployments.
While optimized for D-Link devices, the DEM-311GT is IEEE 802.3z compliant and generally interoperable with third-party Gigabit SFP ports.
Align the LC connector, insert the module into the SFP port until it clicks, then attach the fiber patch cable and verify link status.
The DEM-311GT is CE, FCC, RoHS, and UL listed, ensuring compliance with global safety and environmental standards.
It is ideal for data center uplinks, server farm interconnects, and campus backbone links requiring short-reach fiber runs.
The DEM-311GT is backed by D-Link’s limited lifetime warranty, providing replacement coverage for manufacturing defects.
United States
