SFP-10G-LR= 10GBASE-LR SFP Module
Module SFP (Mini GBIC) 10 Gigabit for Cisco Catalyst Switch
The Cisco 10GBASE-LR Module supports a link length of 10 kilometers on standard Single-Mode Fiber (SMF, G.652).
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Info Produk : https://www.cisco.com/c/en/us/products/collateral/interfaces-modules/transceiver-modules/data_sheet_c78-455693.html