1000BASE-LX Transceiver Module, Compatible with Fortinet Optical Gigabit Ethernet Transceiver Module Single Mode 1310nm LC Duplex Connector DDM 20km /10km; Wide Compatibility 1000BASE Gigabit Ethernet 1000BASE-LX standards (coding asFortinet FN-TRAN-LX Fortinet Compatible ); Protocols MSA Compliant, SFF-8472 and IEEE 802.3 ah-2004 with duplex LC receptacle; Hot Pluggable SFP MSA and RoHS Compliant to Maximize Uptime and Simplify Maintenance