Specifications

Maintenanc
e
5
0003097 Revision A 7
1
Alarms
An alarm is an event that takes place when an anomaly is detected and corrective action is
required.
Alarm Classes: There are three classes of alarms: CRITICAL, MAJOR, and MINOR. Alarm
threshold levels are programmable.
• Critical: A critical alarm is a total loss of service which demands immediate attention. A
critical alarm invokes system fail transfer.
• Major: A major alarm is a fault which affects service to many users. This usually results
in a major degradation in service and needs attention to minimize customer complaints.
• Minor: A minor alarm is any fault which does not fall in either of the above two classes.
Whenever the system is not 100% operational a minor alarm is raised. This normally
requires the attention of a repair person but is not urgent. Examples of a minor alarm
include the loss of a single line or trunk circuit or the loss of one circuit switch link.
Alarm Routing: All attendants are alerted when an alarm is raised. To determine the alarm
status, log on to the Maintenance Terminal and enter the ALARMS command. An alarm
condition is CLEARED when the fault or condition which caused it is corrected, or the threshold
is reprogrammed outside of that which caused the alarm.
Remote Alarms: Each class of alarm has a set of contacts to activate external audible or visual
indicators or for use as control points for remote surveillance systems, data loggers, etc.
Controls and Indicators
The SX-2000 system attempts to detect, isolate, and recover from a fault before the fault
condition affects the user. The system also isolates a fault down to the smallest field-replaceable
module.
The SX-2000 LIGHT Control Panel is located in the control cabinet, above the card slots. The
panel provides faceplate push button switches and LED indicators for
- system reset (Planes A and B)
- activity switch
- activity freeze enable/disable
- alarm indicators (critical, major, and minor)
- remote alarms enable/disable
- panel enable/disable.