... /MDI-X connection.100BaseFX ports supports single/multi mode, SC/ST connector, optional. Features:1. Advanced Ethernet switch technical2. IEEE802.3/802 ... work mode, and support MDI/MDI-X connectionFiber Port: 100BaseFX ports (SC/ST connector, optional)Single-mode: 20, 40,60, 80, 120Km,optionalMulti-mode: 2,5Km ...