The GLCTEST is a Cisco GLC-TE compatible copper transceiver module that has been designed, programmed and tested to work with Cisco brand switches and routers for extended temperatures. It delivers dependable 1 GbE connectivity over copper cable, for 1000BASE-T compliant networks, with a maximum distance of up to 100 m (328 ft). This SFP copper 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.