
3-4 Operation 2010 CSU
totals for the last 24-hour period (or the last 96 fifteen-
minute intervals).
The remaining lines of this screen show the data for any of
the intervals that contained errors. Interval 1 is the most
recently stored interval and interval 96 is the oldest 24-hour
interval. The real time of the interval beginning is shown in
the first column.
If more than five errored intervals have elapsed, [PAGE-
DN] appears to the left of the performance data. Pressing
<return> on this field displays the next five errored intervals.
[PAGE-UP] appears once [PAGE-DN] is used. Pressing
<return> on [PAGE-UP] displays the previous five errored
intervals. Only intervals that contained errors are displayed,
which eliminates rows of zeroes. If an interval is not dis-
played, no errors were detected during that time period.
NOTE: The parameters shown on the ‘Performance’
screens are updated at 5 second intervals.
Per AT&T Technical Reference TR54016, the ‘Stan-
dard 24 Hour’ performance data consists of Errored Sec-
onds (ES), Bursty Errored Seconds (BES), Severely Errored
Seconds (SES), Unavailable Seconds (UAS), Loss of Frame
Count (LOFC), and Controlled Slip Seconds (CSS).
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