Carrier Access Access Navigator user manual Minor Alarm Status LEDs, Alarm Cutoff ACO Status LED

Alarm Clearing

Minor Alarm Status LEDs

Minor Alarm Status LEDs

A minor alarm means that a non-service affecting condition exists, or that a condition exists affecting service to few customer lines (2 to 23) or has the potential to affect traffic, or that a protection switch occurred. Minor faults include:

￿￿IDLC link failure (primary or secondary EOC/TMS fails) if backup is active ￿￿IDLC link out of service because of loopback test

￿￿Standby Controller card removed or failed ￿￿Self-test failure (in redundant system) ￿￿Power input -48V missing or too low

Table 14-13. Minor Alarm Status LEDs

LED State	Description	Troubleshooting
Off	No minor alarms present	Alarms appear only on the active
		Controller.
Yellow	Minor alarm exists	Use the state of the Power LEDs, Active/
		Standby status LEDs, and DS1 status
		LEDs to help locate the source of the
		fault.

Alarm Cutoff (ACO) Status LED

The Alarm Cutoff feature permits the operator to temporarily silence the alarm outputs while testing and repairing the Access Navigator. ACO does not stop DS1 alarm messages.

Pressing the ACO pushbutton switch disables the alarm relays and lights the ACO status LED. This keeps the relay contacts open on the Alarm Output connector. If another alarm occurs, the alarm relays will be enabled again and the ACO status LED will go off.

Alarm Cutoff disables the following signals on the Alarm Output connector:

￿￿Critical alarm ￿￿Major alarm ￿￿Minor alarm

Table 14-14. Alarm Cutoff (ACO) Status LEDs

LED State	Description	Troubleshooting
Off	Alarm(s) active	Normal operation. Any alarms will
		produce relay closures on the Alarm
		Output connector.
Yellow	Alarm(s) suppressed	ACO disables the alarm relays so that all
		contacts remain open on the Alarm
		Output connector.

Access Navigator - Release 1.8 August 2003 14-19