100% Cisco compatible. Guaranteed. The wsp-q40glr4l-st is a Cisco WSP-Q40GLR4L compatible fiber transceiver module that has been designed, programmed and d to work with Cisco brand compatible switches and routers. It delivers dependable 40 GbE connectivity over fiber cable, for 40GBase-IR4 compliant networks, with a maximum distance of up to 2 km (1.2 mi). technical Specifications: wavelength: 1270nm to 1330nm maximum data transfer rate: 40 Gbps Type: single mode connection Type: LC maximum transfer distance: 2 km (1.2 mi) MTBF: 95, 832, 027 hours power consumption: low power consumption digital Diagnostics Monitoring (DDM): Yes this QSFP+ module is hot-swappable making upgrades and replacements seamless by minimizing network disruptions. Star Tech SFPs all Star Tech SFP & SFP+ transceiver Modules are backed by a star Tech lifetime warranty and free lifetime multilingual technical support. Star Tech offers a wide variety of SFP modules and direct-attach SFP cables, providing the dependability and reliability you need to ensure consistent network performance.