740-045627 Juniper Networks 40Gb/s 40GBase-ESR Optical Transceiver

740-045627 Overview

The Juniper Networks 740-045627 40GBase-ESR4 QSFP+ transceiver is designed for short-to-medium range high-speed data transmission in data centers and enterprise networks. Operating at 850nm, it uses parallel 4-lane optical transmission over MPO-12 multi-mode fiber to achieve 40Gbps connectivity with a reach of up to 300 meters. Its extended short reach capability makes it ideal for high-density deployments where distances exceed typical SR4 modules but do not require costly long-range optics. The hot-pluggable QSFP+ form factor ensures easy installation, scalability, and compatibility with Juniper switches and routers, making it a reliable choice for modern data center interconnects and backbone aggregation.