The PTP Clock Realtime Time Offset part 1. Every Time Offset value is an Integer32(4-byte). The maximum size of tnPtpClockRealtimeTimeOffset1, tnPtpClockRealtimeTimeOffset2, and tnPtpClockRealtimeTimeOffset3 is 1200-byte, which is 300 Time Offset values. The number of Time Offset is decided by Duration(tnPtpClockRealtimeTimeOffsetDuration) and Interval(tnPtpClockRealtimeTimeOffsetInterval). For example: Duration = 12(minutes), equals to 720 seconds; Interval = 2(seconds). Then the number of Time Offset = Duration / Interval = 720 / 2 = 360 There will be totally 360 Time Offset values in tnPtpClockRealtimeTimeOffset1, tnPtpClockRealtimeTimeOffset2, and tnPtpClockRealtimeTimeOffset3. tnPtpClockRealtimeTimeOffset1 contains the Time Offset value 1 to 300, size will be 300*4=1200 bytes, 300 Integer32 values. tnPtpClockRealtimeTimeOffset2 contains the Time Offset value 301 to 360, size will be 60*4=240 bytes, 60 Integer32 values. tnPtpClockRealtimeTimeOffset3 contains NO Time Offset values, size will be 0 empty. The range of the Time Offset value is 0x80000001(-2147483647) to 0x7FFFFFFF(2147483647). Special Time Offset value 0x80000000 represents that the Realtime Time Offset is Not Available(NA).