1G SFP Transceivers

1.25G Compact SFP Transceiver

Rate1.25GbpsCommon selectable lengths20km / 25km / 30km / 40kmWavelength1310/1490NMInterfaceLC
Fiberland part number
FLD-GCSFP-20

Key Specifications

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Form TypeCompact BIDI SFP

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Technical Specifications

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14 specifications shown
Vendor NameFiberlandForm TypeCompact BIDI SFP
Data Rate1.25GbpsWavelength1310/1490NM
Common selectable lengths20km / 25km / 30km / 40kmOptical InterfaceLC
Media TypeSMDDM SupportOptional
Commercial Temp.0~70℃Industrial Temp.-40~85℃
Compatible BrandsCisco,HP,Huawei,etc...CertificatesCE,FCC,ROHS,REACH
HS Code8517706000Warranty3 Years

Product Compatibility Mapping

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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.

See Where This Product Fits in the Network

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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

Review the Quality-Control and Test Flow

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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

Frequently Asked Questions

Answers to common compatibility, installation and troubleshooting questions.

What is the difference between equipment compatibility and optical compatibility?

Equipment compatibility determines whether the host device recognizes and operates with the module. Optical compatibility determines whether the two ends of the fiber link can communicate correctly. A successful deployment requires both.

Can compatible transceivers be used for 100G, 400G, and 800G networks?

Yes. Compatible modules are available across many high-speed interfaces, although compatibility requirements become increasingly platform-specific at higher data rates.

Why is EEPROM programming important for compatibility?

Network equipment may inspect the module's EEPROM information before allowing normal operation. Correct programming helps the host identify and manage the transceiver properly.

How is a transceiver made compatible with a specific switch brand?

Compatibility is typically achieved through EEPROM programming, identification parameters, interface compliance, and platform-specific coding so that the host device can correctly recognize and communicate with the transceiver.

Why does my compatible transceiver keep losing and restoring the link?

Intermittent links can be caused by marginal optical power, dirty connectors, unstable fiber connections, FEC mismatches, port configuration, temperature, or compatibility issues. Check both the optical link and host-side configuration.

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Engineering resources

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