The Acme Packet 6400 chassis draws cool ambient air through the chassis through intake fans and is exhausted through perforated air outlets located along the rear of the chassis. To avoid overheating the system, do not block the air intake or exhaust ways or otherwise obstruct airflow to the system in any way.

The Acme Packet 6400 automatically adjusts fan speed based on the current operational status and environmental conditions. Fan speed regulation is an automated process that requires no user intervention.

If the Acme Packet 6400 experiences a fan module malfunction and generates an alarm, you must remove the existing fan module and replace it with a fully functioning fan module.

The following figure shows the Acme Packet 6400 fan module.