

GLC-LH-SMD → Model number. 1000BASE-LX/LH → Communication standard (1 Gigabit). SFP Transceiver Module → SFP Transceiver Unit. for SMF → Means designed for Single-Mode Fiber (single-mode fiber). Full name Cisco GLC-LH-SMD 1000BASE-LX/LH SFP Transceiver Module for SMF
