This attribute specifies the optical level used to declare the video OOR low alarm. Valid values are <0096>12 to +6 dBm in 0.1 dB increments, represented as a 2s complement integer (coding -120 to +60, where 0x00 = 0 dBm, 0x88 = -12.0 dBm, etc.). Upon ME instantiation, the ONT sets this attribute to 0xA1 (-9.5 dBm). (R, W) (optional) (1 byte) NOTE <0096> Because the power measurement returned in the optical signal level attribute has a resolution of 1 dB, it is possible that the measured value could appear to be in-range, even though an out-of-range alarm has been declared against a threshold with 0.1 dB resolution.