Add-On's bulk packaged GLC-SX-MM-AO is the perfect choice for larger qty upgrade needs. 10 piece bulk trays allow for easier configuration, over the hassels of individually packaged product. Add-On's industry-standard SFP is a hot-swappable input/output device that plugs into a Gigabit Ethernet slot, linking the port with the fiber-optic network. These transceivers (GBIC, SFP, XFP and XENPAK) are 100% compliant for all of our networking product lines and are factory loaded with OEM specific configuration data required for networking compliance. Add-On's transceivers initialize and perform identically to the OEM transceivers, and can be mixed and deployed with other OEM or 3rd party transceivers for seamless network performance.