Avaya 5900 Series Installing page 22

Installation preparation
designed to operate for a brief period of time on a single fan tray, allowing replacement of a
defective fan tray while the switch is operating.
The following figure shows ERS 5900 Series cooling fan trays.
Figure 3: Fan tray and power supply unit
Power supply compatibility with cooling fans
Power supplies support hot-swap and are available in two models to support cooling fan airflow
modes.
If you are using front to back cooling or back to front cooling, ensure that you use compatible power
supplies that match the cooling fan airflow.
The following figure show ERS 5900 Series AC power supply.
February 2016 Installing Avaya ERS 5900 Series
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