... connection.100BaseFX ports supports single/multi mode, SC/ST connector, optional. Features:1. Advanced Ethernet switch technical2. IEEE802.3 ... Single-mode: 20, 40,60, 80, 120Km,optionalMulti-mode: 2,5Km,optionalWavelength: 850nm, 1310 nm, 1550nmAlarm output interface: One relay alarm output. Support power ... yearsApprovals: FCC,CE, RoHS approvalsUpdate Date:2012-04-24 04:03:17 Industrial Ethernet Switch