D-Link 10 Gigabit Ethernet Optical Transceiver SFP+ - 10GBASE-SR

In this review the D-Link DEM-431XT is judged as a straightforward way to add short-range fiber connectivity to switches that accept SFP+ modules. It is best for network administrators and small data centers that need reliable 10 Gbps links over multimode fiber without replacing existing switches. The bottom line: the DEM-431XT delivers industry-standard 10GBASE-SR performance in a compact, hot-pluggable package, making it a sensible pay-as-you-grow option when expanding fiber ports.

Key Features

• 10G Ethernet: Certified for 10GBASE-SR to provide up to 10 Gbps short-range multimode fiber links for high-throughput segments.
• 300 m reach: Supports multimode fiber connections up to 300 metres, sufficient for typical rack-to-rack and campus closet links.
• Hot pluggable: The SFP+ form factor allows modules to be swapped while the switch remains powered, reducing maintenance downtime.
• Duplex LC connector: Uses standard Duplex LC connectors for broad compatibility with existing multimode fiber cabling.
• MSA compliant: Multiple Source Agreement compliance increases the chance it will interoperate with other vendors equipment.
• RoHS compliant: Built to meet hazardous substance restrictions for safer sourcing and disposal.

Who It's For

The DEM-431XT is aimed at network engineers, IT managers, and small to medium sized deployments that already have SFP+ capable switches and want to enable fiber links selectively. It is particularly useful when adding 10 Gbps trunking between closets or linking servers in short-distance topologies.

It is not for users who need single-mode long-haul optics or integrated transceivers for non-SFP+ ports; organizations requiring exotic wavelength tuning, extended temperature models, or vendor-locked proprietary modules should consider other options.

Pros & Cons

Pros

• Provides certified 10GBASE-SR performance for short-range multimode fiber at up to 300 m.
• Hot-pluggable SFP+ design makes upgrades and maintenance simple without powering down equipment.
• MSA compliance improves compatibility across different manufacturers equipment.
• Compact Duplex LC connector fits common fiber patching standards used in data centers.

Cons

• Designed only for multimode short-range links, so it is not suitable for single-mode or long-distance runs.
• Does not include detailed environmental ratings or extended temperature options for harsh sites.

Specifications

Product	D-Link DEM-431XT SFP+
Form factor	Enhanced Small Form-Pluggable (SFP+)
Standard	10GBASE-SR (IEEE certified)
Maximum speed	10 Gbps
Maximum reach	Up to 300 metres on multimode fiber
Connector type	Duplex LC
Compliance	MSA compliant, RoHS compliant

Our Verdict

The D-Link DEM-431XT is a pragmatic choice for teams that need to add short-range 10 Gbps fiber ports without replacing switches. Its compliance with 10GBASE-SR and MSA standards, combined with hot-pluggable convenience, makes it good value for typical rack and campus links; those needing long-distance single-mode optics or ruggedized modules should look elsewhere.

Frequently Asked Questions

Will this module work in non-D-Link switches?
Yes, the DEM-431XT is MSA compliant and generally interoperable with other vendors equipment that accept standard SFP+ modules, though compatibility checks are recommended.

What fiber connector does it use?
The module uses a standard Duplex LC connector for multimode fiber patching.

How far can the link run?
It supports multimode fiber runs up to 300 metres for 10GBASE-SR links.