D-Link DEM 311GT - SFP (mini-GBIC) transceiver module

1GbE - 1000Base-SX - LC multi-mode - up to 550 m - 850 nm - for DGS 12XX; DXS 1100, 1210, 3400, 3600; Nuclias Cloud-Managed DBS-2000-10, 2000-28, 2000-52