Specifications

Common Equipment Description 2-19
BNM-T3/E3
BNM LED Indicators
The BNM LED indicators are described in Table2-2. All LEDs are located on the faceplate of the
front card.
Table2-2 BNM LED Indicators
Push Buttons
The BNM has two push-buttons located on the faceplate of the front card.
• Audible Cut-off (ACO) BUTTON
ACO button is a momentary switch and is depressed during a major or minor alarm to deactivate
the audible alarm relays and to turn the ACO LED on. Any new alarm will cause the relays to be
reactivated.
• History Clear (HIST) BUTTON
History Clear button is a momentary switch and is depressed to extinguish the History LED if
there is no active alarm at the time.
Type of LED Color Meaning
ACTIVE (ACT) LED Green On indicates the card set is in active mode.
STANDBY (STBY) LED Yellow On indicates the card set is in standby mode.
FAIL (FAIL) LED Red On indicates the BNM card set has failed or the line module
is missing.
PORT (PORT) LED Green Green indicates the port is active.
Yellow Yellow indicates a remote alarm on the port.
Red Red indicates a local alarm on the port.
Off indicates the port has not been activated (brought up).
MAJOR (MAJ) ALARM LED Red On indicates a major alarm in the node.
MINOR (MIN) ALARM LED Red On indicates a minor alarm in the node.
DC OK A (DC-A) LED Green On indicates “A” power is OK.
Off indicates “A” power module is missing or present but at
0 volts.
DC OK B (DC-B) LED Green On indicates “B” power is OK.
Off indicates “B” power module is missing or present but at
0 volts.
ACO (ACO) LED Yellow On indicates the ACO (audible cut-off) button has been
depressed during a major or minor alarm. This LED is
extinguished when that alarm is cleared
HISTORY (HIST) LED Green ON indicates a major or minor alarm has occurred since the
last time the HIST button was pressed.