This table contains the results for history Measurement Intervals in a SOAM EVC Extention (ECE) Measurement session. It provides port statistics for the UNI ports of EVC. Rows of this table object are created automatically by the SNMP Agent when the ECE Measurement session is running and a Measurement Interval is completed. Each row in the table represents the history statistics for a ECE Measurement session availability Measurement Interval for the defined ECE. 32 completed Measurement Intervals are to be supported. If there are at least 32 rows in the table and a new Measurement Interval completes and a new row is to be added to the table, the oldest completed Measurement Interval is deleted (row deletion). The rows and objects in this table are to be persistent upon reboot or restart of a device if tnEthSoamPmSessionCfgStorageMode is enabled for tnEthSoamPmSessionCfgType of 'ece'