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4. Monitoring the Unit
4-12
February 2001 8784-A2-GB20-30
BES (Bursty Errored Seconds):
Contains the number of bursty errored
seconds for the current interval. A bursty errored second is any second with
more than one but less than 320 CRC errors.
LOFC (Loss of Frame Count):
Contains the number of times that an LOF is
declared.
Status:
Contains the contents of the status events register. The status events
register maintains a history of specific events that have occurred during an
interval. Values include:
— Y: Remote alarm indication signal (yellow alarm) received at the DSX-1
interface
— L: Loss of signal detected at the DSX-1 interface
— E: Excessive error rate threshold exceeded
— F: Frame synchronization bit error detected
— V: Line code violation detected
— None: No significant events have occurred
Fields on this screen include:
This 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 resets every 15 minutes.
Error Events
Counter
A running total of CRC and OOF events. Total range = 0–65535.
Counter resets when the statistics are cleared.
Current Int Performance data for the current 15-minute interval.
Interval
xx
Historical performance data for up to 96 15-minute intervals
(24 hours) where the value of
xx
is from 01 to 96.
Worst Interval Identifies the interval during which the most error events were
detected.