The object for global configuration of Downstream channel lock state of the PHY parameters of the QAM channels in the containment tree of docsIfMCmtsEqamGlobCfgDownPhysicalIndex. A locked PHY parameter is blocked for sets via Management or other means such as DEPI session. Setting a BIT to '1' locks the corresponding PHY parameter for configuration, returning error 'wrongValue' on SET attempts until administratively unlocked. A set to this object is reflected in docsIfMCmtsEqamDownstreamDeviceConfigPhyParamLock of the QAM channels being set. Note that setting a BIT to '0' does not necessarily grant write access to a PHY parameter, because of existing hardware constraints indicated in docsIfMCmtsEqamDownstreamDevicePhyParamLock.