100G-ER4LT-QSFP40KM — Module QSFP28 100 Gbps Extreme Networks — 100 Gb ER4 Lite 40 km QSFP28 Module

The 100G-ER4LT-QSFP40KM from Extreme Networks is a QSFP28 transceiver designed for ultra-long-reach 100 Gigabit Ethernet links. Built on ER4 Lite technology, it supports distances up to 40 km over single-mode fiber (SMF) with a duplex LC connector, making it one of the highest-performing QSFP28 modules in the Extreme Networks portfolio for metropolitan and inter-datacenter interconnects.

This transceiver is aimed at telecom operators, cloud service providers, and large enterprises that need to connect remote sites without intermediate amplification. Its 40 km reach sets it clearly apart from LR4 variants limited to 10 km. Genuine Extreme Networks hardware, manufacturer warranty.