... switch ... power ... output warning for power failure and port break alarm6. Redundant 24VDC power ... Single-mode: 20, 40,60, 80, 120Km,optionalMulti-mode: 2,5Km,optionalWavelength: 850nm, 1310 nm, 1550nmAlarm output interface: One relay alarm output. Support power ... , port link and network alarm Indicator: Power ... power input ... dual power ... FCC Part 15, CISPR ...