tmnxPtpClockStepType 1.3.6.1.4.1.6527.3.1.2.74.3.1.1.3

The value of tmnxPtpClockStepType indicates how the system provides timing information. SROS systems always have a tmnxPtpClockStepType of 'oneStep (1)', and never transmit PTP 'follow up' packets.