NETSCOUT SFP-1000SX Gig Fiber SFP Transceiver with DDM Singlemode or multimode fiber (varies by module) 1000BASE-SX Gig Fiber SFP Transceiver with DDM SX Gigabit Fiber Optic SFP transceiver Plug and play capability for easy installation. Mini-GBIC Interface compliant Plug and play capability for easy installation. Single mode or multi-mode fiber (varies by module) Mini-GBIC Interface compliant.