This Cisco GLC-SX-MM compatible SFP transceiver provides 1000Base-LX throughput up to 2km over multi-mode fiber (MMF) at a wavelength of 1310nm using a LC connector. It is also capable of withstanding rugged environments and can operate at temperatures between -40"C to +85"C. It is guaranteed to be 100% compatible with the equivalent Cisco transceiver. This easy to install hot swappable transceiver has been programmed uniquely serialized and data-traffic and application tested to ensure that it will initialize and perform identically. Digital optical monitoring (DOM) support is also present to allow access to real-time operating parameters. All of our transceivers are Trade Agreements Act (TAA) compliant. We stand behind the quality of our products and proudly offer a limited lifetime warranty.