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DEM-311GT
- Description:
- D-Link Gigabit SFP optical module, multi-mode, 550 meters, wavelength 850nm, LC connector
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DEM-311GT Overview
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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Explore more options from Transceivers or explore other D-Link products.
DEM-311GT Specifications
| Product Type | Transceiver |
| Form Factor | SFP+ |
| Data Rate | 10G |
| Connector Type | LC |
| Wavelength | 1310nm |
| Transmission Distance | Long-Range |
| Fiber Type | Single-mode |
| Max Distance | 10 km |
| Supported Protocols | Ethernet, Fibre Channel |
| Network Interface | Fiber |
| Power Consumption | 3.5W |
| Operating Temperature | 0 to 70°C |
| Storage Temperature | -40 to 85°C |
| Input Voltage | 3.3V |
| Compatibility | Cisco / Juniper / Huawei / Arista |
| Product Name | DEM-311GT |
| Height | 0.7 inches |
| Width | 1.0 inches |
| Depth | 1.5 inches |
| Weight | 0.05 lbs |
DEM-311GT Use Case
High-Density Data Center Switch Interconnect with DEM-311GT-D-Link Gigabit SFP
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.
Campus LAN Backbone Uplink Deployment
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.
IP Video Surveillance Storage Network Extension
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.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table
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|---|---|---|---|---|---|
| Compatibility | Cisco / Juniper / Huawei / Arista | Cisco, Juniper, Huawei, Arista | Cisco, Juniper, Huawei, Arista | Cisco, Juniper, Huawei, Arista | Cisco / Juniper / Huawei / Arista |
| Connector Type | LC | LC | LC | LC | LC |
| Data Rate | 10G | 100G | 10G | 10G | 10G |
| Depth | 1.8 inches | 1.0 inches | 0.9 inches | 0.34 inches | 1.5 inches |
| Fiber Type | Single-mode | Multi-mode | Single-mode | Single-mode | Single-mode |
| Form Factor | XFP | QSFP | SFP | SFP | SFP+ |
| Height | 0.6 inches | 0.5 inches | 0.7 inches | 0.13 inches | 0.7 inches |
| Input Voltage | 3.3V | 3.3V | 3.3V | 3.3V | 3.3V |
| Max Distance | 80 km | 100 meters | 10 km | 80 km | 10 km |
| 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 |
| Power Consumption | 3.5W | 5W | 3.5W | N/A | 3.5W |
| Product Name | DEM-431XT 10G XFP Optical Transceiver | DFE-852 QSFP Transceiver Module | DFE-851 10G SFP Transceiver | DFE-850 Optical Transceiver Module | DEM-311GT |
| Product Type | Transceiver | Transceiver | Transceiver | Transceiver | Transceiver |
| Storage Temperature | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C | -40 to 85°C |
| Supported Protocols | Ethernet, Fibre Channel | Ethernet, Fibre Channel | Ethernet | Ethernet, Fibre Channel | Ethernet, Fibre Channel |
| Transmission Distance | Long-Range | Short-Range | Short-Range | Long-Range | Long-Range |
| Wavelength | 1310 nm | 850nm | 1310 nm | 1310 nm | 1310nm |
| Weight | 0.15 lbs | 0.05 lbs | 0.1 lbs | 0.04 lbs | 0.05 lbs |
| Width | 1.2 inches | 1.0 inches | 0.5 inches | 0.59 inches | 1.0 inches |
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Questions & Answers
Q
What is the D-Link DEM-311GT Gigabit SFP optical module?
A
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.
Q
What data rate does the DEM-311GT support?
A
The DEM-311GT supports 1 Gbps full-duplex data transmission, making it ideal for high-speed Ethernet applications.
Q
Which fiber type is compatible with the DEM-311GT?
A
This SFP module is designed for multi-mode fiber (MMF) cabling, supporting OM1/OM2/OM3 standards for optimal performance.
Q
How far can the DEM-311GT transmit data?
A
The DEM-311GT delivers reliable connectivity up to 550 meters over multi-mode fiber at standard conditions.
Q
What connector type does the DEM-311GT use?
A
It uses a standard LC duplex connector for secure, low-loss fiber connections in rack-mounted switches and patch panels.
Q
What is the operating wavelength of the DEM-311GT?
A
The module operates at an 850 nm wavelength, optimized for short-reach multi-mode fiber networks.
Q
Is the DEM-311GT hot-swappable?
A
Yes, the DEM-311GT supports hot-swapping, allowing you to install or remove it without powering down the host device.
Q
Which D-Link devices are compatible with the DEM-311GT?
A
The DEM-311GT is compatible with D-Link Gigabit switches and routers that feature an SFP port, including the DGS and DES series.
Q
Does the DEM-311GT support digital diagnostics monitoring (DDM)?
A
Yes, it includes DDM (also known as DOM) support for real-time monitoring of optical output power, temperature, and voltage.
Q
What are the operating temperature specifications of the DEM-311GT?
A
The DEM-311GT operates reliably between 0 °C and 70 °C (32 °F–158 °F) for standard commercial deployments.
Q
Can the DEM-311GT work with third-party network equipment?
A
While optimized for D-Link devices, the DEM-311GT is IEEE 802.3z compliant and generally interoperable with third-party Gigabit SFP ports.
Q
How do I install the DEM-311GT in my switch?
A
Align the LC connector, insert the module into the SFP port until it clicks, then attach the fiber patch cable and verify link status.
Q
What certifications does the DEM-311GT hold?
A
The DEM-311GT is CE, FCC, RoHS, and UL listed, ensuring compliance with global safety and environmental standards.
Q
What use cases are ideal for the DEM-311GT?
A
It is ideal for data center uplinks, server farm interconnects, and campus backbone links requiring short-reach fiber runs.
Q
What warranty covers the DEM-311GT?
A
The DEM-311GT is backed by D-Link’s limited lifetime warranty, providing replacement coverage for manufacturing defects.
