This item is 1000Base-SX uplink module for the DELHG-UA. The DELHG-UA extends the functionality of certain DIGITAL Interface modules or standalone devices by providing high-speed uplink capability through Gigabit Ethernet technology. The DELHG-UA uses a short wavelength laser device that connects to 50 or 62.5 micrometer multimode fiber optics.The DELHG-UA is used in MultiSwitch 700.