Signal LEDsLED State StatusOff Bootup(1) White Signal strength: low≥ -28 dBm(2) White Signal strength: good≥ -25 dBm(3) White Signal strength: strong≥ -11 dBm(1) AmberSignal strength: too low< -28 dBmCheck the quality of the fiberconnection, and calculate the totaloptical loss of the optical splitters.(1) Amber(2) WhiteSignal strength: too strong≥ -8 dBmAdd an optical splitter, or adda 5 or 10 dB optical attenuator.(3) AmberNo signalCheck the fiber cables andconnectors, and ensure that the OLTfunctions properly.(Varies)AlternatingBetween(2) Amber(1) WhiteandSignalStrengthNo authorityThe UF-LOCO has not beenauthorized or cannot communicatewith the OLT. Check passwords andOLT settings.