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2. Web Server Interface
E1 CRC4 Mode
Provides line integrity detection to determine if bit errors are present on the line.
Error Status and Alarm Thresholds Table
The unit can be programmed to generate an alarm condition based on a specific
level of performance degradation. The CBR screen presents a table that provides
current error status and alarm threshold information.
Acceptable alarm thresholds are set for periods of 15 minutes (900 seconds) and
sampled every second. The error types listed in the following paragraphs can be
preset to a value between 0 and 900 seconds. Setting a field to 0 (zero) disables
the alarm on that statistic. To effectively disable alarm reporting, set all fields to 0
(zero).
The 15-minute time frame is not based on the TR 54016 or T1.403 interval
boundaries, but is a time window based on the accumulated counts over the
previous fifteen 1-minute intervals. In all cases, if the number of actual network
errored seconds in the previous 15 minutes reaches the preset threshold for the
specified error type, an alarm condition is declared.
The four columns of the status table are as follows:
The table provides error status and alarm threshold information for the following
error parameters:
ES
Sets the Errored Seconds (ES) threshold. An ES is a 1-second period in which at
least one logic error occurred. The default value is 45 seconds.
SES
Sets the Severely Errored Seconds (SES) threshold. An SES is a 1-second period
in which at least 320 CRC errors or one Out-of-Frame (OOF) error occurred. The
default value is 5 seconds.
LOSS
Sets the Loss of Signal Seconds (LOSS) threshold. A LOSS is 1-second period in
which the T1/E1 received signal is interrupted. The default value is 5 seconds.
UAS
Sets the Unavailable Seconds (UAS) threshold. A UAS is a 1-second period in
which consecutive severely errored seconds cause an unavailable state. The
default is 0 seconds (Disabled).
CSS
Sets the Controlled Slip Seconds (CSS) threshold. The default is 0 seconds
(Disabled).
2-16
Values: Disable, Enable
Default: Disable
Status: Displays the current status of the CBR port.
Alarm: Displays the alarm value of the network port. The unit declares an
alarm as soon as the count exceeds the threshold set.
Count: Displays the number of events or occurrences of this statistic that have
been detected.
Threshold: Displays a read/write field that can be set to a desirable threshold.
April 2003
8300-A2-GB20-00
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