40GBase-CSR4

QSFP-40G-CSR4 Overview

The Cisco QSFP-40G-CSR4 40Gbps 40GBase-CSR4 QSFP+ Transceiver Module is a high-performance optical solution designed for 40 Gigabit Ethernet connectivity in enterprise and data center networks. Operating over multi-mode fiber (MMF) with an 850nm short-wavelength laser, it supports transmission distances of up to 400 meters on OM4 fiber and 300 meters on OM3 fiber, making it ideal for medium-range, high-bandwidth applications. This module uses an MTP/MPO connector and a compact, hot-swappable QSFP+ form factor, enabling quick installation and replacement without service disruption. Engineered to Cisco’s stringent standards.