This object specifies the type of stop time to terminate the SOAM LM session. The stop time can be forever (none), relative, or fixed. The value of 'none' indicates that the SOAM LM session never ends once it has started unless it the session is disabled. 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 LM session when the mefSoamLmFixedStopDateAndTime is less than or equal to the current system date and time. This value is used to implement an On-Demand fixed time PM session. The value of 'relative' stops the SOAM LM session when the time indicated by mefSoamLmRelativeStopTime has passed since the session start time as determined by the mefSoamLmCfgStartTimeType, mefSoamLmCfgFixedStartDateAndTime and mefSoamLmCfgRelativeStartTime 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.