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.
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
mefSoamDmFixedStopDateAndTime 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 mefSoamDmRelativeStopTime has passed since the session
start time as determined by the mefSoamDmCfgStartTimeType,
mefSoamDmCfgFixedStartDateAndTime and mefSoamDmCfgRelativeStartTime
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.