l (380 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Data in Interval 1: 1 Line Code Violations, 2 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins 1 Errored Secs, 1 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Data in Interval 2: 255 Line Code Violations, 255 Path Code Violations 32 Slip Secs, 109 Fr Loss Secs, 34 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 116 Unavail Secs Data in Interval 3: Line Code Violations, 0 Path Code Violations Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Data in Interval 4: 0 Line Code Violations, 0 Path Code Violations Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs The first paragraph shows the combined totals for all the intervals in memory. The maximum amount of time for which the CSU/DSU will record events is 24 hours Configuring T1s (ninety-six 15-minute intervals), at which point the oldest interval's data is discarded. The output is arranged by interval, not by something more obvious like actual time. This is a throwback to the way standalone CSU/DSUs report historical information. The first interval listed is the current interval. The next interval, numbered as Interval 1, is the most recent interval. The intervals increment until they reach 96. When looking at this information, search for patterns. If you see several line code vi- olations, or any other error that shows up in all or most of the intervals, you've got a problem. You will see errors when a T1 bounces for any reason. Interval 2 in the pre- ceding output shows some pretty severe errors, which are the result of me unplugging the T1 cable from the jack. If you're seeing errors incrementing, start troubleshooting, and