Desired Line Attenuation Threshold for the 2B/10P PME. This object configures the line attenuation alarm threshold. When the current value of Line Attenuation reaches or exceeds this threshold, a efmCuPmeLineAtnCrossing notification MAY be generated, if enabled by efmCuPmeLineAtnCrossingEnable. This object is writable for the CO subtype PMEs (-O). It is read-only for the CPE subtype (-R). Changing of the Line Attenuation Threshold must be performed when the link is Down. Attempts to change this object MUST be rejected with the error inconsistentValue, if the link is Up or Initializing. If a Clause 45 MDIO Interface to the PME is present, then this object will map to the Loop attenuation threshold bits in the 2B PMD line quality thresholds register