SFPs & GBICs: 1000BASE-SX mini-GBIC Optic, MMF, LC connector, 550m Compatible with CISCO GLC-SX-MM, 3COM 3CSFP91, HP J4858A, EXTREME 10051, NORTEL AA1419013 , AVAYA 4705-150 completely SFPs & GBICs: 1000BASE-SX mini-GBIC Optic, SMF, LC connector, 10km Compatible with CISCO GLC-LX-SM, 3COM 3CSFP92, HP J4859A, EXTREME 10052, NORTEL AA1419015 , AVAYA 4705-150 completely