Figure 4: Installing the fan trays and power supplies
Next steps
After you install the two fan trays and at least one power supply, you can install and connect power
to the switch.
Power specifications
The VSP 7000 Series switches support the following power supply configurations:
• One AC power supply
• One DC power supply
• Two AC power supplies
• Two DC power supplies
• One AC power supply and one DC power supply
When you operate the switch with two power supplies, the switch supports redundancy, load
sharing, and full hot-swap replacement of a power supply for uninterruptible operation. The power
supply is location independent; you can install an AC or DC power supply into either power supply
slot on the switch.
For cooling, the switch supports two airflow patterns: front to back or back to front. The air flow
direction is determined by the main power supply. All power supplies and fan trays must match the
airflow direction. A switch can operate for a brief period with one fan tray, but one fan may not be
able to achieve maximum environmental conditions.
Each switch is shipped with two fan trays and can support up to two power supplies.
Important:
Power supply and fan tray direction must match. If you require front to back cooling, you must
ensure that the power supply is designated for front to back cooling. Or, if you require back to
front cooling, you must ensure that the power supply is designated for back to front cooling.
Cooling fans and power supplies
August 2014 Installing Avaya VSP 7000 Series 19
Comments? infodev@avaya.com
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