Setting the BPV and ES Thresholds
Two alarm conditions, Bipolar Violations and Errored Seconds, feature user-
settable thresholds. The BPV threshold is specified as a negative exponent of
10 and is monitored over 15-minute intervals. A BPV threshold of 6, for example,
is exceeded when a fifteen-minute period has an average BPV rate exceeding 1
BPV per million bits (i.e., when the BPV rate exceeds 10
-6
).
The Errored Seconds (ES) parameter consists of a user-specified error count
over a user-specified time interval. The number of Errored Seconds can be
between 0 and 399. The interval over which Errored Seconds are counted can
be between 1 and 15 minutes. For example, if
ES ERRORS = 100
and
ES INTERVAL =
6
, Access-T will declare an alarm if it counts 100 Errored Seconds within the
six-minute interval.
To set the BPV and ES thresholds, perform the following steps:
1.
Select
ALARMS
from the Main Menu Line.
2.
Select
THRESHOLD
.
3.
Select
LINE
or
AUX
.
4.
Select
BPV
.
5.
Select the appropriate threshold (5 to 9, for error rates from 10
-5
to
10
-9
). Press the
Enter
key and the
Esc
key.
6.
Select the
ES ERRORS
parameter.
7. Key-in the desired three-digit number. Press the
Enter
key and the
Esc
key.
8.
Select the
ES INTERVAL
parameter.
9.
Key-in the appropriate threshold interval (from 1 to 15 minutes).
10.
Press the
Enter
key.
11.
Press the
Esc
key repeatedly to return to the Main Menu Line.
Chapter 6
ACST-0351-005
Configuration Procedures
June 1996
6-24
