ADTRAN MX3216, System Manual

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Section 6, User Interface - Menu Descriptions
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Table 6-47. Environmental Alarm External Inputs
External Input Description
AUX #1 Input This input indicates open or closed relay contacts for AUX #1.
AUX #2 Input This input indicates open or closed relay contacts for AUX #2.
AUX #3 Input This input indicates open or closed relay contacts for AUX #3.
AUX #4 Input This input indicates open or closed relay contacts for AUX #4.
PWR BUS A–B This input generates an alarm signal when one of the power feeds fail.
When both power feeds fail, a critical alarm is not generated. A
complete power failure at the MX3216 is detected by communication
loss at attached devices.
ACO Status This field displays the current status of the ACO inputs. This includes
the front panel ACO switch and any auxiliary inputs configured as
ACO.