100G-LR-QSFP10KM Extreme Compatible QSFP28 Transceiver

100G-LR-QSFP10KM is Extreme Networks' part number for a 100G single-lambda QSFP28 transceiver with 10 km reach over single-mode fiber. EdgeOptic's compatible replacement is built on our 100G-QSFP28-SL10 platform, matching the original optical and electrical specifications. This module uses PAM4 modulation to achieve 100G on a single wavelength, which is a fundamentally different approach from the more common 100GBASE-LR4 design.

Traditional 100GBASE-LR4 uses four 25G NRZ lanes multiplexed onto four LAN WDM wavelengths (1295.56, 1300.05, 1304.58, 1309.14 nm), requiring an internal optical MUX/DEMUX. The 100G-LR-QSFP10KM eliminates that WDM complexity by transmitting the full 100G payload on a single wavelength using PAM4 (4-level pulse amplitude modulation). PAM4 encodes two bits per symbol, allowing 100G throughput at a symbol rate of approximately 53.125 GBaud. The trade-off is that PAM4 requires a DSP (digital signal processor) inside the module for signal conditioning, which increases power consumption and thermal output compared to passive NRZ-based LR4 modules.

Extreme Networks platforms that support the 100G-LR-QSFP10KM include the ExtremeSwitching X690, X695, VSP 7400, and SLX 9740. These switches use ASICs with native PAM4 SerDes on their QSFP28 host interfaces. Older Extreme platforms with NRZ-only 4x25G QSFP28 interfaces (such as the X670-G2) cannot drive a single-lambda PAM4 module, because the host SerDes expects four 25G NRZ lanes rather than a single 53G PAM4 lane. Verifying host-side PAM4 SerDes support in the switch datasheet is essential before deploying this optic.

The transceiver operates over duplex LC/UPC connectors on G.652 single-mode fiber with a maximum reach of 10 km. The QSFP28 form factor follows the QSFP28 MSA mechanical specification. DDM provides optical power, temperature, voltage, and laser bias current monitoring. Power consumption for single-lambda PAM4 modules with integrated DSP is typically higher than equivalent 4x25G LR4 modules; confirm the module's rated power draw against the switch port's power budget before deployment in fully populated line cards. Adequate airflow across the QSFP28 faceplate is important for long-term reliability in high-density chassis configurations.

EdgeOptic's compatible is coded for Extreme platform recognition on X690, X695, VSP 7400, and SLX 9740. For single-lambda 100G deployments, switch compatibility verification, or volume pricing, contact our sales team