Product
155M BiDi SFP Fiber Optic Transceiver Module TX1310/RX1550nm 40km Simplex LC/SC SMF DDM
155M SFP BiDi TX1310/RX1550nm 40km- Model reference
- S155-SML-40
- Data rate
- 155M
- Wavelength
- 1310/1550
- Reach
- 40KM
- Form factor
- BIDI SFP
Key specifications
Original part-number references
These references compare optical specifications. Confirm the host device, firmware and coding profile before deployment.
| Brand | Original part number | Model reference | Optical specification reference | Next step |
|---|---|---|---|---|
| ALCATEL-LUCENT | 622-131T155R-I1 | S155-SML-40 | Nokia/Alcatel-Lucent industrial bidirectional SFP, TX 1310 nm/RX 1550 nm, 40 km over single-mode fiber, LC connector. 1850 Transport Service Switch 5 Transceiver SpecificationsReviewed 2026-08-17 | Specification matchCheck host compatibility |
| PLANET | MFB-TFA40 | S155-SML-40 | PLANET industrial 100BASE-BX-U SFP transceiver, TX 1310 nm/RX 1550 nm, 40 km over single-mode fiber, WDM LC connector. MFB Series Fast Ethernet Transceiver Data SheetReviewed 2026-08-17 | Specification matchCheck host compatibility |
| TRANSITION NETWORKS | TN-SFP-OC3SB41 | S155-SML-40 | Transition Networks bidirectional 100BASE-FX/OC-3 SFP, TX 1310 nm/RX 1550 nm, 40 km over single-mode fiber, LC connector, with DMI. TN-SFP-OC3SB Series Data SheetReviewed 2026-08-17 | Specification matchCheck host compatibility |
Compatibility matching
Compatible with a wide range of major network brands.
Send the host device brand, model and link requirements so we can match an appropriate option.Applications
Review where this product fits the link design.
Confirm the host port, fibre or cable path, distance and operating environment before selecting the final variant.
- Endpoint fitHost device, port role and remote-end interface
- Link fitRate, reach, wavelength, fibre and connector
- Project fitEnvironment, quantity and document requirements
Testing evidence
Request evidence against the exact product scope.
Available evidence depends on the model and agreed review scope. Ask for the checks needed by engineering or procurement before approving a sample or rollout.
- Product identityModel, label, connector and wavelength details
- Host contextCoding or recognition evidence where applicable
- Output evidenceOptical, diagnostic or link information where available
Product datasheets
Review the document for the exact model.
Review the document for the exact model and reach before approving a sample or rollout.
Download S155-SML-40 specification (PDF)Related questions
Five answers for this product path.
Product selectionHow are BiDi transceivers selected as a pair?
BiDi modules use complementary transmit and receive wavelengths. Confirm the A- and B-side wavelength pair, data rate, reach, connector and host requirements rather than ordering two identical ends.
Browse productsCompatibility & codingWill DOM or DDM readings be available on the host?
They are available only when the module, interface and host software support the diagnostic functions and expose them correctly. Confirm the required readings as part of the device review.
Start a model reviewOptical link designDo both ends need the same wavelength?
Duplex links normally use matching interface wavelengths at both ends. BiDi and wavelength-division links use planned complementary or channel-specific wavelengths, so the exact link architecture matters.
Use the selection guideHigh-speed deploymentHow should I compare QSFP-DD and OSFP for 400G?
Start with the host port and supported interface list. The form factors have different mechanical and thermal characteristics and should not be treated as direct substitutes without device support.
Plan a technical reviewDocuments & procurementHow do I make sure a document applies to my exact model?
Compare the model reference, interface, reach and variant with your product shortlist. If the document is not published or the revision is unclear, send the model and required document type through the document request form before using it for approval.
Request a document pack