LX Gig Fiber SFP transceiver with DDM (1310 nm, Singlemode) for the NETSCOUT LinkRunner AT Network Auto-Tester. The pluggable transceiver module is a high performance integrated duplex data link for bi-directional communication over singlemode optical fiber. It is compliant with the Small Form factor Pluggable (SFP) Multi- Source Agreement (MSA) transceiver specification. It is specifically designed for high speed data links up to 1.25 GBaud. The Stratos Lightwave SFP transceiver is hot pluggable which allows a suitably designed enclosure to be changed from one type of external interface to another simply by plugging in a SFP having the alternative external interface.