... and adopts the double optical ports, 1+1 protection mode. 2. Technical parameter1).the fiber-optic port Rate:155Mb ... optional) The average optical power:≥-8dBm(single mode, 1310,LED) ≥-18dBm(single mode, 850,LED) ≥-25dBm(multi mode, 1310,LED) Sensitivity:≤-36dBm The ... power: ≥25dB The port type: FC/SC(optional); single mode/multi mode(optional); single fiber/double fiber (optional)2) Voltage: -48V3) The ...