This attribute specifies the type of start time of the PM Test. The start time can immediate, relative, or fixed. The value of 'immediate' means that Performance Monitor starts immediatly, when osEthServFlowPerfEnabled object is true and osEthServAdminStatus object is enable The value of 'fixed' starts the PM Test when osEthServFlowPerfEnabled object is true and osEthServAdminStatus object is enable and osEthServFlowPerfFixedStartTime is less than or equal to the current system date. The value of 'relative' starts the PM Test when the current system date and time minus the osEthServFlowPerfRelStartTime is greater than or equal to the system date and time when osEthServFlowPerfEnabled object was true and osEthServAdminStatus object was enable. If the written value of the osEthServFlowPerfRelStartTime object is '0' the PM Test starts immediately and the session operates as if it was set to the immediate mode.