Description: tmnxOamPmStsBaseEntry contains the base statistics for one OAM
Performance Monitoring Measurement Interval Data Set.

Rows are created in this table when a test is started (e.g. using
tmnxOamPmCfgDelayDmmAdminStatus and tmnxOamPmCfgDelayDmmOnDmndStatus).
At that time, a row for the current interval (with the index value
tmnxOamPmStsIntvlNum=1) is created for each row with a matching session
name in tmnxOamPmCfgMeasIntvlTable.  In addition, a row is created in
this table for the test's 'miRaw(1)' interval.

After that, the timed creation and destruction of rows in this table is
explained using the following example.

Suppose the configured number of intervals to be retained is as follows
(where index columns are underlined with octothorpes, and 'tmnxOamPm'
is abbreviated as '_'):

_CfgSessName  _CfgMeasIntvlDuration  _CfgMeasIntvlsStored
############  #####################  --------------------
'mySess1'     'mi15Minutes(2)'                          3

Suppose statistics collection started at t = 0 (minutes).

Suppose the following rows exist in tmnxOamPmStsBaseTable at t = 59
(minutes):

_CfgSessName  _StsBaseTestType  _StsIntvlDuration  _StsIntvlNum
############  ################  #################  ############
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              1
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              2
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              3
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              4

The interval numbers are assigned as follows:
1 - the historical interval ended at t = 15 minutes
2 - the historical interval ended at t = 30 minutes
3 - the historical interval ended at t = 45 minutes
4 - the current interval

Then, after the next 15 minute interval ends (e.g. at t = 61 minutes),
the following rows will exist:

_CfgSessName  _StsBaseTestType  _StsIntvlDuration  _StsIntvlNum
############  ################  #################  ############
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              2
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              3
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              4
'mySess1'     'dmm(1)'          'mi15Minutes(2)'              5

The interval numbers are assigned as follows:
2 - the historical interval ended at t = 30 minutes
3 - the historical interval ended at t = 45 minutes
4 - the historical interval ended at t = 60 minutes
5 - the current interval

The row with interval number 1 was destroyed, because
tmnxOamPmCfgMeasIntvlsStored=3 specifies that at most three historical
intervals be retained.

Rows are also destroyed in this table when the corresponding
tmnxOamPmCfgMeasIntvlTable row is destroyed.

When the index value tmnxOamPmStsMeasIntvlDuration is 'miRaw(1)', only
one interval is available (i.e. tmnxOamPmStsIntvlNum = 1).

When a test is running, the measurement interval data set for a test's
'miRaw(1)' measurement interval duration can be cleared using
TIMETRA-CLEAR-MIB::tmnxClearAction and tmnxClearParams.  The change to
the objects in the specified row is as follows.

Object                        Change on Clear Operation
----------------------------  --------------------------------------
tmnxOamPmStsBaseOperStatus    No change
tmnxOamPmStsBaseSuspect       Set to 'true(1)'
tmnxOamPmStsBaseStartTime     Set to UTC time of the clear operation
tmnxOamPmStsBaseElapsedTime   Set to zero
tmnxOamPmStsBaseTestFramesTx  Set to zero
tmnxOamPmStsBaseTestFramesRx  Set to zero

Measurement interval data sets for  measurement interval durations
other than 'miRaw(1)' cannot be cleared.