The NVMSX550U is 1-P 1000Base-SX Mini-GBIC module. Features industry standard small form pluggable (SFP) package, multimode fiber required OM1, OM2, OM3 or OM4, duplex LC receptacle, differential LVPECL inputs and outputs, single power supply 3.3V, TTL signal detect indicator, hot pluggable, class 1 laser compliant to EN 60825-1, compliant 100-MS-S-I/100-M6-SN-I, 802.32 Gigabit Ethernet.