TRENDnet TDM-E400 - Manual (Page 171)

Chapter 16. Monitoring System Status and Performing Diagnostics
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The DSL Statistics page reports error data relating to the last 15-
minute interval, the current day, and the previous day.
At the bottom of the page, the Detailed Interval Statistic table
displays links you can click on to display detailed data for each 15-
minute interval in the past 24 hours. For example, when you click on
1-4, data displays for the 16 intervals (15-minutes each) that make
up the previous 4 hours. Figure 78 shows an example.
Figure 78. DSL Interval Statistics Page