StarTech QSFP40GSR4ST Cisco Compatible QSFP Transceiver 40GBASE-SR4
Overview
The StarTech QSFP40GSR4ST is a Cisco-compatible fiber optic QSFP+ transceiver module engineered for high-performance 40 Gigabit Ethernet (40GbE) networking. This module is designed to be a direct replacement for the Cisco QSFP-40G-SR4-S or QSFP-40G-SR4, providing reliable 40Gbps connectivity over multimode fiber (MMF) infrastructure. It is an essential component for data center aggregation, high-speed backbone links, and enterprise-level switch-to-switch connections.
Operating at a wavelength of 850nm, this transceiver supports distances of up to 100 meters over OM3 multimode fiber and up to 150 meters over OM4 multimode fiber. It utilizes an MPO/MTP connector, which allows for high-density cabling by transmitting four independent 10Gbps channels simultaneously. The module is fully hot-swappable, allowing for installation or replacement without a network shutdown, ensuring maximum uptime for mission-critical hardware.
The QSFP40GSR4ST features Digital Diagnostic Monitoring (DDM/DOM) support, which provides real-time access to operating parameters such as transceiver temperature, laser bias current, and optical transmit/receive power. Built to meet or exceed OEM specifications and MSA (Multi-Source Agreement) standards, this transceiver ensures seamless integration and reliable performance within Cisco-based networking environments.
Key Features
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100% Cisco compatibility for seamless integration with Catalyst and Nexus switches
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Supports 40Gbps throughput for high-demand data center applications
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850nm LOMMF support for distances up to 150m (OM4) or 100m (OM3)
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Digital Diagnostic Monitoring (DDM) for real-time performance tracking
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Hot-swappable design minimizes downtime during maintenance or upgrades
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