D-Link DEM 311GT - SFP (mini-GBIC) transceiver module - GigE - 1000Base-SX - LC multi-mode - up to 550 m - 850 nm - for DES 30XX; DGS 3630; DWS 3024; DXS 1100, 1210, 3400, 3600; Web Smart DXS-1210-12
This transceiver uses the industry-standard Small form Pluggable (SFP) package. It slides into the mini-GBIC slot of the Gigabit device. Like all D-Link mini-GBIC transceivers, it is hot-swappable: you can remove or replace the transceiver with the system powered on, which allows modules to be added or swapped without interrupting the network.