All Cisco compatible ONS XFP transceiver modules are certified for functionality, reliability and performance under rigorous testing parameters. Every ONS XFP is RoHS and MSA compliant and built with Tier 1 grade components and lasers. Each Cisco compatible ONS XFP module is individually tested in it's intended application with identical functionality to the OEM product. All ENET ONS XFP modules are backed by an industry-leading lifetime replacement warranty and technical support.