User guide

Terminal Interface 4-11
4
Event History
This screen allows the user to review and clear the alarm and status history
of the DL3800.
To view the EVENT HISTORY, move the highlight bar to EVENT HISTORY in
the NODE MAIN MENU, and press the Enter key. Use the up and down
cursor keys to move ahead to the next page or back to the previous page of
the EVENT HISTORY MENU.
UAS This is a count of one-second intervals in which the DS1 path has been unavailable. The
DS1 path is determined to be unavailable from the onset of 10 contiguous SESs, or the
onset of the condition leading to a failure.
CSS The Controlled Slip Second is a count of one-second intervals containing one or more
controlled slips.
OOF This is the number of seconds that the signal has been out of frame during the
accumulation period. This counter is suppressed during an LOS condition.
A total of 80 OOFs in a 10 second sliding window (approximately 10-3) will create a
Major Alarm, and 5 OOFs in a 600 second sliding window (approximately 10-6) will
create a Minor Alarm.
BPV Bipolar Violations. This display provides the number of BPVs that have occurred during
the accumulation period. A total of 15430 BPVs in a 10 second sliding window
(approximately 10-3) will create a Major Alarm and 916 BPVs in a 600 second sliding
window (approximately 10-6) will create a Minor Alarm.
FES This display provides a count of the number of seconds containing Framing Bits that have
been in error during the accumulation period.
Table 4-4 Alarm Level
Alarm Parameter Definition
Alarm Level:
Major
Minor
Idled
Status
Service affecting
Needs attention, not yet service affecting
Alarm condition has expired
Non-service-affecting event
Date and Time Date and time of the occurrence or expiration of the alarm/state
Address The address is the physical location
Device The device reporting the status and alarm condition (Unit #), and the type of
device (NET, DTE, or NODE)
Table 4-3 STATISTICS MENU Error Types (Continued)
Parameter Definition