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Multimode SFP module performs consistently for short range links.
DEM-311GT
D-Link Gigabit SFP optical module, multi-mode, 550 meters, w...
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DEM-311GT
D-Link Gigabit SFP optical module, multi-mode, 550 meters, w...
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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.
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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.
To get the detailed certification, please go to the Compliance Center.
 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 |
| Power Consumption | 3.5W | N/A | 5W | 3.5W | 3.5W |
| 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 |
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.