4 Gbps | Single Mode Fiber | LC | 1 km (6.2 mi) | Lifetime Warranty The QSFP4GLR4S is a Cisco QSFP-4G-LR4-S compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco™ brand switches and routers. It delivers dependable 4 GbE connectivity over fiber cable, for 4GBASE-LR4 compliant networks, with a maximum distance of up to 1 km (6.2 mi). Technical Specifications: • Wavelength: 127nm to 133nm • Maximum Data Transfer Rate: 4 Gbps • Type: Single Mode Fiber • Connection Type: LC Connector • Maximum Transfer Distance: 1 km (6.2 mi) • MTBF: 1,489,426 hours • Power Consumption: Less than 2.5 Watts • Digital Diagnostics Monitoring (DDM): Yes This QSFP+ fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions. StarTech.com SFPs All StarTech.com SFP & SFP+ transceiver modules are backed by a lifetime warranty and free lifetime multilingual technical support. StarTech.com offers a wide variety of SFP modules and direct-attach SFP cables, providing the convenience and reliability you need to ensure dependable network performance. The StarTech.com Advantage * 1% CISCO QSFP-4G-LR4-S COMPATIBLE: Works with Cisco switches like Firepower, ASR1, ASR9, C93, C385 and others * TECHNICAL SPECS: 4GBASE-LR4 / 4 Gbps / Single Mode (SMF) / LC Connector / 127nm to 133nm / Digital Diagnostic Monitoring (DDM) / Distances up to 1km (6.2mi) * TESTED FOR OEM HOST COMPATIBILITY: Hot-swappable in Cisco routers and switches * DDM support reports the transceivers status to most SNMP network management tools * WORKS WITH MSA COMPLIANT SWITCHES: Also works with switch models from Ubiquiti, D-Link, Netgear, Supermicro, TP-Link and more that accept uncoded modules * THE IT PRO’S CHOICE: Designed and built for IT Professionals, this SFP module is backed for life (lifetime of module, not network switch), including free lifetime 24/5 multi-lingual technical assistance. https://elecena.pl/product/30596762/startech-com-qsfp40glr4s-startech-com-cisco-qsfp-40g-lr4-s-compatible 2026-08-18 https://elecena.pl/product/30596762/startech-com-qsfp40glr4s-startech-com-cisco-qsfp-40g-lr4-s-compatible 2026-10-28