Environmental Alarm Inputs - ADTRAN MX2820 System Manual

Adtran mx2820 multiplexer: system manual

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Section 1, System Description - System Connectivity

Environmental Alarm Inputs

Wire-wrap posts provide environmental alarm inputs for ACO, AUX1, AUX2, AUX3A and

AUX3B alarms.

For ACO, AUX1, AUX2, and AUX3A, alarms are activated when the circuit between the

connecting posts is closed (a short appears across the line).

For AUX3B, an alarm is activated by a cadenced input across the input posts; this input can

be used to indicate a fan failure.

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