At the CM, this object returns the equalization data for the downstream channel. At the CMTS, this object is not applicable and is not instantiated. Note that previous CMTS implementations may instantiate this object in two ways: - An equalization value indicating an equalization average for the upstream channel. Those values have vendor-dependent interpretations. - Return a zero-length OCTET STRING to indicate that the value is unknown or if there is no equalization data available or defined.