Cisco ASR 5000 Manuale di installazione - Pagina 2

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Ventilation Considerations

Airflow within the system is designed per Telcordia recommendations to ensure the proper vertical convection

cooling of the system.

As shown in the figure below, the lower fan tray pulls ambient air inward from the front and side intake vents

located at the bottom of the chassis. The air is pushed upwards through the system and absorbs heat as it

passes over system components.

Total air flow exiting the chassis is approximately:

• 275CFM (7.8 cubic meters/minute) – Low fan speed

• 565CFM (16 cubic meters/minute) – High fan speed

The upper fan tray pulls the heated air up through the chassis. The heated air exits through the side and rear

exhaust vents located at the top of the chassis.

Figure 1: System Airflow and Ventilation

Proper ventilation and cooling must allow the chassis to operate within the temperature and humidity levels

described in the following table.

ASR 5000 Installation Guide

Chassis Installation