100G QSFP28 Transceiver
100GBASE-LR4 QSFP28 10km Optical Transceiver
A 100GbE LR4 module for duplex LC links over OS2 single-mode fiber, with project-based review for coding, host equipment, and deployment requirements.
Specifications
- Warranty
- 5-Years
- Customization
- Free OEM labeling
- Delivery Time
- 48 hours dispatch
- Confirm the basic link conditions first.
It avoids the most common wrong-order situations.

100G QSFP28 port
Duplex LC single-mode fiber
Reach up to 10km
Confirm the host has a 100GbE QSFP28 interface before selecting LR4.
LR4 is intended for OS2 single-mode fiber with an LC duplex connection.
Check actual fiber route, patching, and optical loss against the project path.

- Know the module. Then check the project.
The specification is the starting point. The review inputs help confirm the right option before ordering.
Ethernet standard | IEEE 802.3ba 100GBASE-LR4 |
|---|---|
Data rate | 100GbE |
Form factor | QSFP28 |
Maximum reach | Up to 10 km |
Fiber type | OS2 single-mode fiber |
Connector | Duplex LC/UPC |
Wavelength / optical design | 4 LAN-WDM lanes around 1310 nm |
DDM / DOM | Supported |
Operating temperature | Commercial; industrial option by review |
Power consumption | Typical low-power QSFP28 LR4 option; final value depends on selected module |

- Typical 100G LR4 deployment scenarios
Use these as starting points, then send your actual equipment model or BOM for review.

- 100G switch to 100G switch
Simple duplex OS2 fiber link between two 100G QSFP28 ports.
Check before order: host model, OEM coding, port configuration, and actual fiber path.
- 100G switch to router / NIC/uplink
100G LR4 link from an aggregation switch to a router, NIC, server uplink, or transport-facing interface.


- Quality & Certifications
Every module undergoes rigorous testing in our ISO-certified facility. We validate electrical performance, optical power, temperature cycling, and compatibility across multiple switch platforms before shipment.

- Comprehensive Testing
Every module is qualified on advanced test benches to verify optical power, eye diagram, BER and long‑term reliability before shipment.

Typical validation equipment used before shipment.
Nearby 100G options to compare before ordering
The speed may be the same, but the fiber design, reach, and deployment trade-offs are not.
100G option | Typical Reach | Fiber/connector | Best Fit | Checking before ordering |
|---|---|---|---|---|
100GBASE-LR4 | 10 km | OS2 SMF / duplex LC | Standard 10 km duplex single-mode links | Host coding, link budget, and fiber route |
100G LR1 | 10 km | OS2 SMF / duplex LC | Single-lambda architecture where supported | Host support and equipment requirement |
100G CWDM4 | 2 km | SMF / duplex LC | Shorter-reach data center or campus links | Reach limit and interoperability expectation |
100G PSM4 | 500 m | Parallel SMF / MPO | Parallel-fiber links with existing MPO plant | Fiber plant and connector availability |
100G ER4 | 40 km | OS2 SMF / duplex LC | Longer metro or remote links | Optical budget, dispersion, and cost |
Frequently Asked Questions
i. What fiber is required for 100G LR4?
100G LR4 uses OS2 single-mode fiber with duplex LC connectors and supports links up to 10km.
ii. What is the difference between 100G LR4 and 100G CWDM4?
100G LR4 supports up to 10km over duplex SMF, while 100G CWDM4 is typically used for links up to 2km.
iii. Can 100G LR4 work with Cisco switches?
Yes. Compatibility depends on the platform, software version, and coding requirements.
iv. Does 100G LR4 support DDM/DOM?
Yes. Most QSFP28 LR4 modules support digital diagnostics monitoring.
v. When should I choose 100G ER4 instead of LR4?
If the link distance exceeds 10km, 100G ER4 may be a more suitable option.

