The WSP-Q40GLR4L-ST is a Cisco WSP-Q40GLR4L compatible fiber transceiver module that has been designed, programmed & tested to work with Cisco brand switches & routers. It delivers dependable 10 Gb E connectivity over fiber cable, for 10 G Base-LR4 compliant networks, with a maximum distance of up to 2 km (1.2 mi). This QSFP+ fiber module is hot-swappable, making upgrades & replacements seamless by minimizing network disruptions. Star Tech.com offers a wide variety of SFP modules & direct-attach SFP cables, providing the convenience & reliability you need to ensure dependable network performance.