QSFP-40G-ER4 — QSFP+ 40 Gbps

The QSFP-40G-ER4 is a Cisco QSFP+ 40 Gbps transceiver compliant with the IEEE 40GBASE-ER4 standard, offering the maximum reach in the Cisco QSFP+ optical range with 40 km over single-mode fiber (SMF). The connection is made via LC UPC duplex and the module operates from 0 to 70 °C, covering the vast majority of datacenter and telecom environments.

This long-reach module is the reference solution for metropolitan or inter-datacenter links spanning several tens of kilometres, with no signal regenerator required. It targets telecom operators, multi-site enterprises, and cloud service providers needing reliable 40 Gbps connectivity over long distances. Genuine Cisco hardware, manufacturer warranty.