Fiberland
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40G QSFP+ TRANSCEIVER

40G QSFP+ 1310nm 40km

Rate40GReach40kmWavelength1310InterfaceLC
Fiberland part number
FLD-QSFP+ER4
Unit price300.00USD / piece
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At a glance

Key Specifications

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Form TypeQSFP+

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Model data

Technical Specifications

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14 specifications shown
Fiberland Part NumberFLD-QSFP+ER4Vendor NameFIBERLAND
Data Rate40GWavelength1310
Reach40kmForm TypeQSFP+
Optical InterfaceLCDDM 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-references17 manufacturer part numbersAcross 10 brands
Showing 8 of 17 verified matches

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Original part numberBrandFiberland part numberProduct description
QSFP-40G-ER4CISCOFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.
QSFP-40G-ER4ARISTAFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.
JNP-QSFP-40GE-ER4JUNIPERFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.
740-066424JUNIPERFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.
QSFPP-40GBASE-ER4JUNIPERFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.
740-059185JUNIPERFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.
40G-QSFP-ER4BROCADEFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.
57-1000327-01BROCADEFLD-QSFP+ER440GBASE-ER4 QSFP+ transceiver, 1310 nm CWDM band, 40 km over SMF, duplex LC, with digital diagnostics.

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

Review the Quality-Control and Test Flow

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Testing and quality

Quality Control and Test Flow

Review the sequence from material verification and firmware programming through optical, temperature, compatibility and final QA inspection.

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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.

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 is the transceiver recognized but DDM/DOM information is missing?

The module may be recognized while diagnostic monitoring is not fully supported by the host platform or compatibility profile. Check whether both the transceiver and network device support DDM/DOM for that interface.

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 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.

Why does replacing an OEM transceiver with a compatible transceiver result in no link?

First verify that the compatible replacement matches the OEM module's form factor, data rate, wavelength, reach, fiber type, connector, and interface standard. Then confirm that it has the correct compatibility coding for the host platform.

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