The index for the measurement interval within this PM session. Measurement Int indexes are assigned sequentially by the SNMP Agent. The first Measurement Int that occurs after the session is started is assigned index 1. This object applies regardless of the value of osSoamPmDmPrflType. Referential integrity is necessary, i.e., the index needs to be persistent upon a reboot or restart of a device. The index is never reused for other PM sessions on the same Flow while this session is active until it wraps to zero. The index value keeps increasing up to that time. This is to facilitate access control based on a fixed index for an EMS, since the index is not reused.