4-4 Terminal Operation
PRISM 3021
Alarms Screen
The Alarms screen (Figure 4- 6) allows viewing the current
alarm status of the network and the DTE lines.
NET A
LARMS
These status lines display the selected element’s current net-
work signal alarm state (Table 4-B). Alarms are determined by
the selectable thresholds in Alarm Parameters on page 4-15.
DTE A
LARMS
These status lines display the selected element’s current DTE
signal alarm state (Table 4-C). Alarms are determined by the
selectable thresholds in Alarm Parameters on page 4-15.
Selectable thresholds in the Alarm Parameters screen and
the DTR Alarm may be enabled or disabled for the ports in
the Port Parameters screen.
ALARM
STATUS
The main body of the Alarms screen shows the current
count for parameters that may be used to trigger an alarm.
The Current column displays the consecutive seconds dur-
ing which the error condition has existed.
The Threshold column displays the values set in the Alarm
Configuration screen (page 4-15). Parameters having a current
value equal to or greater than its non-zero threshold generates
an alarm. Any parameter with a threshold value of zero is dis-
abled from generating alarms. An alarm is declared when the
current value of any parameter exceeds its non-zero threshold.
The parameters shown on the Alarms screen are
updated at approximately five-second intervals.
R
ESET
A
LARM
R
EGISTERS
Pressing ENTER on (RESET) zeros the value of all Current
alarm parameters.
Table 4-B NET Alarm Indicators
Alarm
Description
-------
No status is available
None
No alarm threshold has been exceeded, although
errors may exist which do not exceed thresholds.
XCL
The unit has lost its external clock source
ERRS
The Errored Seconds, Severely Errored Seconds, or
Bipolar Errored Seconds threshold is exceeded.
LOSS
The Loss Of Signal Seconds threshold is exceeded.
OOSS
The Out of Service Seconds threshold is exceeded.
OOFS
The Out Of Frame Seconds threshold is exceeded.
3021 DSU 1.00/1.01 P R I S M 3 0 2 1 Date: 03/15/96
No Far End Response Time: 13:51:01
------------------------------------ ALARMS ----------------------------------
NET Alarms: NONE
DTE Alarms: NONE
Current Threshold
Loss of Signal Seconds (LOSS): 0 5
Errored Seconds (ES): 0 45
Severely Errored Seconds (SES): 0 5
Unavailable Seconds (UAS): 0 0
Out of Frame Seconds (OOFS): 0 5
Remote Alarm Seconds (RAS): 0 0
AIS Seconds (AISS): 0 0
BPV Seconds (BPVS): 3 0
DTE LOS/OOF Seconds (LOSS): 0 0
Power Loss Seconds (PLS): 0
Reset Alarm Registers: (RESET)
----------------------------------- Messages ---------------------------------
Figure 4-6 Alarms Screen
Table 4-C DTE Alarm Indicators
Alarm
Description
None
No alarm threshold has been exceeded, although
errors may exist which do not exceed thresholds.
DTR
DTR on DTE interface is false.
