4-Port 100Base-FX Multimode MT-RJ Module * Complies with 802.3u 100Base-FX 802.3x flow control * 4 Port * 100Mbps Speed * Multimode MT-RJ * 1300nm multimode 62.5/125 2km max. * 12K MAC address * 5MB RAM Buffer * Link/Activity status Duplex/Collision status for each fiber port