This object specifies the type of stop time to terminate the SOAM DM session. The stop time can be forever (none), relative, or fixed. The value of 'none' indicates that the SOAM DM session never ends once it has started unless the session is disabled. This value is used to select a proactive PM session. The value of 'immediate' is illegal and a write error will be returned if this value is used. The value of 'fixed' stops the SOAM DM session when the osSoamDmFixedStopDateAndTime is less than or equal to the current system date. This value is used to implement an on-demand fixed time PM session. The value of 'relative' stops the SOAM DM session when the time indicated by osSoamDmCfgRelativeStopTime has passed since the session start time as determined by the osSoamDmCfgStartTimeType, osSoamDmCfgFixedStartDateAndTime and osSoamDmCfgRelativeStartTime objects. This value is used to implement an on-demand relative time PM session. This object can only be written at row creation time and cannot be modified once it has been created.