4. Monitoring the Unit
8700-A2-GB25-10
February 2001
4-7
The following Network Error Statistics are collected for the selected port:
ES (Errored Seconds): Seconds during which one or more cyclic redundancy
check (CRC) error events occurred. A CRC value is calculated for each
24 frames or 4608 bits of data and is transmitted with the framing information.
The receiving unit calculates a CRC value for the same 24 frames and
compares the values. If the values are unequal a CRC error event is logged.
SES (Severely Errored Seconds): Seconds during which 320 or more CRC
error events occurred.
FEBE (Far-End Block Errors): CRC errors reported by the remote
equipment.
Complete: Whether the interval register contains data for all 900 seconds of
the interval.
Fields on this screen include:
Field . . .
Contains . . .
Current Interval Timer
The number of seconds which have elapsed in the current
15-minute interval. Maximum value is 900 seconds
(15 minutes). This counter is reset every 15 minutes.
When zero, the port is disabled.
Error Events Counter
A running total of CRC errors. Range 0–65535. This counter
resets when the near-end data is cleared. When zero, the port is
disabled.
Current Int
Performance data for the current 15-minute interval.
When blank, the port is disabled.
Interval
xx
Historical performance data for up to 96 15-minute intervals
(24 hours). When blank, the port is disabled.
Worst Interval
The number of the interval with the worst (highest) performance
data for both the near- and far-end statistics. If two or more
intervals are equal, the oldest interval is displayed.
When blank, the port is disabled.
Near and Far Tot
A running total of the near- and far-end performance statistics.
