BPX Switch Common Core 3-13
Alarm/Status Monitor Card
Table 3-4 ASM Front Panel Controls and Indicators
No
Controls/
Indicator Function
1 alarms LEDs A red major alarm and a yellow minor alarm indicator to display the status
of the local node. In general, a major alarm is service-affecting whereas a
minor alarm is a non-service affecting failure.
2 dc LEDs Two green LEDs displaying the status of the two dc power busses on the
Stratabus backplane. On–indicates voltage within tolerance. Off–indicates
an out-of-tolerance voltage.
3 ACO/hist LEDs ACO LED (yellow) lights when the front panel ACO pushbutton is
operated. History LED (green) indicates an alarm has been detected by the
ASM at some time in the past but may or may not be clear at present time.
4 ACO switch When operated, releases the audible alarm relay.
5 history clear switch Extinguishes the history LED if the alarm condition has cleared. If the
alarm is still present when the history clear switch is thrown, the history
LED will stay lit.
6 card status LEDs Active (green) indicates card is on-line and clear of alarms. Standby
(yellow) indicates card is off-line. Fault (red) indicates a card failure is
detected by the card self-test diagnostics.
