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1G Duplex SFP

1.25G SFP Duplex 1550nm 120km

Rate1GReach120kmWavelength1550InterfaceDUPLEX LC
Fiberland part number
FLD-SG-SMD-120
Unit price44.00USD / piece
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At a glance

Key Specifications

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Form TypeSFP

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Model data

Technical Specifications

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14 specifications shown
Fiberland Part NumberFLD-SG-SMD-120Vendor NameFIBERLAND
Data Rate1GWavelength1550
Reach120kmForm TypeSFP
Optical InterfaceDUPLEX LCDDM SupportYES
Commercial Temp.0~70℃Industrial Temp.-40~85℃
Compatible BrandsCisco,Huawei,Nvidia...200+ brandsComplianceCE,FCC,ROHS,REACH
Warranty3 YearsModeSM
Compatible model reference

Product Compatibility Mapping

Cross-reference the original manufacturer part number with the corresponding Fiberland part number before confirming the target device and firmware.

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Verified cross-references2 manufacturer part numbersAcross 2 brands
Showing 2 of 2 verified matches

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Original part numberBrandFiberland part numberProduct description
MGB-L120PLANETFLD-SG-SMD-120PLANET 1000BASE-LX SFP transceiver, 1550 nm, 120 km over single-mode fiber, dual LC/UPC, with DDM.
AT-SPZX120/IALLIED TELESISFLD-SG-SMD-120Allied Telesis industrial 1000ZX SFP transceiver, 1550 nm, 120 km over single-mode fiber, LC connector, with DDM.

A part-number cross-reference is a model-selection starting point, not a blanket device guarantee. Final fit depends on the exact device, firmware or OS, target port and requested coding profile.

Link and application reference

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Application planning

Optical Transceiver Application and Link Map

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Optical transceiver application diagram covering data center, DCI, campus, server and metro networks
Testing and quality reference

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Testing and quality

Quality Control and Test Flow

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Quality control flow covering material, firmware, optical, temperature, compatibility and final QA checks
Product FAQ

Frequently Asked Questions

Answers to common compatibility, installation and troubleshooting questions.

Can compatible transceivers be reprogrammed?

Absolutely! All of our transceivers can be easily reprogrammed using our standalone offline coding kit. To get started, please share the part number, description, and serial number of your current transceivers, as well as the brands you need them to work with. Our team will generate the corresponding .bin file and send it over with clear instructions so you can update your transceivers immediately.

Will compatible transceivers work after a switch firmware upgrade?

They often do, but firmware changes can modify transceiver validation behavior. Compatibility should therefore be verified when deploying modules on newly updated network operating systems.

Why does my switch detect the transceiver but not establish a link?

Possible causes include incorrect fiber type, wavelength mismatch, polarity, dirty connectors, excessive optical loss, incompatible link partners, FEC settings, port configuration, or compatibility issues.

What does an “unsupported transceiver” message mean?

It usually means the host device does not recognize or approve the identification information stored in the module. It does not necessarily indicate an optical failure.

What happens if a transceiver has the wrong compatibility coding?

The device may reject the module, display an unsupported-transceiver warning, fail to establish a link, or provide incomplete monitoring information.

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