StarTech.com Cisco QSFP-40G-LR4-S Compatible QSFP+ Module, 40GBASE-LR4, 40GbE SMF Optic Transceiver, 40GE Gigabit Ethernet LC Connector, 10km, 1270nm to 1330nm DDM, Cisco Firepower ASR1000 - Lifetime Warranty (QSFP40GLR4S) - QSFP+ transceiver module (equivalent to: Cisco QSFP-40G-LR4-S) - 40GbE - 40GBase-LR4 - LC single-mode - up to 10 km - 1270-1330 nm

The QSFP40GLR4S is a Cisco QSFP-40G-LR4-S compatible fiber transceiver module that has been designed, programmed and tested to work with Cisco brand switches and routers. It delivers dependable 40 GbE connectivity over fiber cable, for 40GBASE-LR4 compliant networks, with a maximum distance of up to 10 km (6.2 mi). This QSFP+ fiber module is hot-swappable, making upgrades and replacements seamless by minimizing network disruptions. 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.