https://www.dlink.com/middle-east/en/products/dem-311gt
DEM-311GT | SFP 1000Base-SX Multi-mode Fibre Transceiver | Transceivers and modules
multi mode fibredemsfpsxtransceiver
https://www.dlink.com/gr/el/products/dis-s301sx
DIS-S301SX | 1-port Mini-GBIC SFP to 1000BaseSX Multi-Mode 550M Fibre Transceiver
mini gbicdisportsfpmulti