Select a specification to see how it affects model selection.
Check this recorded value against the target device and project requirements before quotation approval.
Filter the product record by the information needed for engineering or purchasing review.
| Fiberland Part Number | FLD-QSFP+LR4-20 | Vendor Name | FIBERLAND |
|---|---|---|---|
| Data Rate | 40G | Wavelength | 1310 |
| Reach | 20km | Form Type | QSFP+ |
| Optical Interface | LC | DDM Support | YES |
| Commercial Temp. | 0~70℃ | Industrial Temp. | -40~85℃ |
| Compatible Brands | Cisco,Huawei,Nvidia...200+ brands | Compliance | CE,FCC,ROHS,REACH |
| Warranty | 3 Years | Mode | SM |
Cross-reference the original manufacturer part number with the corresponding Fiberland part number before confirming the target device and firmware.
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| Original part number | Brand | Fiberland part number | Product description |
|---|---|---|---|
| SO-QSFP-LR4-20 | SMARTOPTICS | FLD-QSFP+LR4-20 | 40G LR4 QSFP+ transceiver, 1271/1291/1311/1331 nm, 20 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.
Review common data-center, DCI, campus, server and metro-network connections before confirming speed, reach, fiber type and connector.
Compare representative network topologies and link paths to identify the appropriate product family for the intended deployment.
Follow the checkpoints used to verify materials, firmware, optical performance, temperature stability, compatibility and final inspection.
Review the sequence from material verification and firmware programming through optical, temperature, compatibility and final QA inspection.
Answers to common compatibility, installation and troubleshooting questions.
No. Each transceiver generally needs to be compatible with the equipment in which it is installed. For example, one end may be coded for one switch brand and the other end for another.
Network equipment may inspect the module's EEPROM information before allowing normal operation. Correct programming helps the host identify and manage the transceiver properly.
Yes. The same optical hardware may support multiple equipment brands when it is programmed with the appropriate compatibility profile. Multi-vendor coding options may also be available for certain applications.
Reinserting a module forces the host to redetect and reinitialize the transceiver. If this repeatedly resolves the issue, inspect the port, module contacts, firmware behavior, and compatibility profile rather than assuming the optical link itself is faulty.
Each transceiver must be compatible with its own host device. In a mixed-vendor link, one end may be correctly coded while the transceiver at the opposite end is not fully compatible with its switch or router.
Move from model selection to internal approval with the documents, compatibility checks and verification paths buyers use most.
01Technical filesFind model-level specifications, drawings and selection documents before internal review.
Find datasheets
02Device fitReview device, firmware and coding fit before specifying a module for your network.
Check compatibility
03VerificationSee optical, functional and pre-shipment checks used to verify product performance.
Review testing
04Project approvalReview certification routes and request supporting documents for project approval.
View documents