Installing The Fan Trays And Power Supply Units - Avaya 5900 Series Installing

Figure 4: AC power supply
Redundant power supply configurations
If you install two power supplies for redundancy, the switch can perform load sharing.
You can hot-swap power supplies for nonstop, uninterrupted switch operation.
Power supply monitoring
For enhanced monitoring, power supplies send information to the switch software about the type
(AC and airflow mode).

Installing the fan trays and power supply units

Your switch supports a combination of field-replaceable power supplies and cooling fan trays. Two
fan trays are included with your switch. You must install the two fan trays and at least one power
supply before using the switch. The switch supports an optional second power supply for
redundancy and load sharing.
To install the fan trays and power supplies to your switch, use the following procedure.
Important:
Supported cooling airflow directions are: front to back or back to front. The airflow direction of
fan trays and power supplies are labelled and fixed. The fan trays and power supplies do not
support the ability to change their airflow direction. The first power supply determines the airflow
direction.
February 2016 Installing Avaya ERS 5900 Series
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Cooling fans and power supplies
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