D-Link DEM-314GT Gigabit Single-Mode 50 km SFP Transceiver

Extend a Managed Network Over the Right Fibre The DEM-314GT is a 1000BASE-LHX SFP transceiver for a compatible Gigabit switch or network interface. It connects over single-mode fibre with an LC optical connection. Its compact hot-pluggable design makes the optical connection replaceable without treating the whole switch as a fixed fibre interface. The rated maximum reach is 50 km, subject to compatible optics, fibre quality and the complete optical link budget. Highlights Optical Connection 1000BASE-LHX for Gigabit Ethernet over single-mode fibre. LC; confirm supplied optical configuration. Matching host and remote optical interfaces are required. Distance and Fibre 50 km. 9/125 µm single-mode fibre. Calculate optical loss and receiver limits before installation. Installation Hot-pluggable SFP form factor. 3.3 V power supplied by a compatible host slot. Check host support, firmware and operating limits. Key Features Choose the Optical Link for the Site 1000BASE-LHX connects a suitable Gigabit interface to single-mode fibre. The connector, wavelength, speed and fibre type must all match the complete link. A mechanically fitting module is not proof that a switch or network card supports its optical mode. Use the Rated Reach as a Design Limit The 50 km rating is a maximum design reach, not a guarantee for any cable of that length. Connector loss, splices, patching, fibre condition and the remote receiver affect the result. Measure and test the commissioned link rather than relying on distance alone. Match the Remote End Use a remote optical interface with the corresponding speed, fibre type and compatible wavelength. Confirm the supplied module’s exact wavelength and LC arrangement before matching it to existing equipment. Check the manufacturer’s host support information for each end. Keep Maintenance Modular The hot-pluggable SFP design allows replacement at the supported host port without restarting the entire switch. Removing the module still interrupts the traffic on that link. Follow the host’s installation procedure, handle the unit with appropriate ESD precautions and protect the optical connector from dust. Respect Optical and Environmental Limits Confirm the host and module operating conditions before installation. Long-reach optics may require attenuation on a short or low-loss link to avoid exceeding the receiver’s maximum input. Use an optical power meter and the documented transmit/receive limits to validate the installation. Complete the Link With the Correct Equipment This offer is one SFP transceiver. The host, fibre cable, patch panels and remote optical interface are separate. Select those parts as one link design, retaining a record of the installed module identity and optical measurements for future maintenance. Summary The DEM-314GT provides a replaceable Gigabit fibre connection when its optical mode, cabling and supported host are selected together. Plan the remote end and optical budget before ordering, then verify the completed link so the installation has a clear, maintainable specification. Frequently Asked Questions Will It Work in Any SFP Slot?ExpandCollapse No. The host must explicitly support this module, its SFP form factor, Ethernet speed and optical mode. An SFP-shaped socket or the same brand name alone does not establish compatibility. Which Fibre Cable Does It Need?ExpandCollapse Use 9/125 µm single-mode fibre, with the exact LC arrangement and remote optical configuration confirmed before ordering. Is the Maximum Distance Guaranteed?ExpandCollapse No. The documented reach is 50 km. It depends on the complete optical path, fibre type and condition, connector/splice losses and receiver limits. Validate the installed link. Do I Need a Different Module at the Other End?ExpandCollapse The remote interface must match the optical mode, speed, fibre and wavelength. It can be a supported matching transceiver or another explicitly compatible interface; confirm both ends of the link. Can a Long-Reach Module Be Used on a Short Cable?ExpandCollapse Only if the resulting optical power is within the receiver’s permitted range. Some short links require an appropriate attenuator. Check the exact transmit/receive specifications and measure the link before use. What Is Included?ExpandCollapse One DEM-314GT transceiver. The host switch or interface, fibre cable, remote module and any required attenuation are separate. Keep the supplied module identification and host compatibility information with the installation record. Read more