10GBASE-LR
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is a mode of 10GBase-L supporting a link length of 10 kilometers on standard single-mode fiber (SMF) (G.652). 10GBASE-LR media type is designed for use over dark fiber. IEEE Specification: IEEE 802.3ae 10GBase-LW 183 10GBase-LW is a mode of 10GBase-L supporting a link length of 10 kilometers on standard single-mode fiber (SMF) (G.652). 10GBASE-LW media type is designed to connect to SONET equipment. IEEE Specification: IEEE 802.3ae