Cisco SFP-10G-LR-S can be used on original Cisco Cisco Nexus 3000 N3K-C31128PQ-10GE; The Cisco 10GBASE-LR Module supports a link length of 10 kilometers on standard single-mode fiber (SMF, G.652)The Cisco SFP-10G-LR-S is a multirate 10GBASE-LR, 10GBASE-LW and OTU2/OTU2e module for extended operating temperature range. It supports a link length of 10 kilometers on standard single-mode fiber (SMF, G.652)